997 turbo 07 noise
10-10-2010, 05:15 PM
#17
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For reasons of record and benefit of other people searching for such issues, I had the exact same discussion 2 days ago, here in Greece, for a noise exactly like the one the OP is describing. And I got exactly the same answer from someone I consider top notch in their knowledge of the cars.
I hear it when the engine is under soft load 1500 to 2000 rpm, especially when driving in a small sideroad and the engine noise bounces off the parked cars. The explanation is the gear to gear rather than gear to belt issue, that is exactly what he said. Some cars have it louder than others, but its all normal and there is nothing we can do about it, or so I was told. This fits exactly with everything that has been written in this post.
Thanks to the OP for raising the issue, and to Macster for analyzing it so well.
I am glad that I have access to such a pool of info. Thanks everyone....
I hear it when the engine is under soft load 1500 to 2000 rpm, especially when driving in a small sideroad and the engine noise bounces off the parked cars. The explanation is the gear to gear rather than gear to belt issue, that is exactly what he said. Some cars have it louder than others, but its all normal and there is nothing we can do about it, or so I was told. This fits exactly with everything that has been written in this post.
Thanks to the OP for raising the issue, and to Macster for analyzing it so well.
I am glad that I have access to such a pool of info. Thanks everyone....
10-10-2010, 07:35 PM
#18
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The increase in noise can be due to thinner oil. This bit of info raises several guestions. 1) When was the oil last changed? 2) Was the proper oil used?
Too many owners -- and through no fault of their own other than relying upon in my opinion (and I'm not alone in this) much too extended oil/filter service intervals -- leave the engine oil in the engine too long. Now a new engine is particularly prone to the contaminating its oil with unburned gasoline and water. This is natural for a new engine to do and in fact to a lesser extent any engine to do.
The only way to deal with this is to change the engine oil/filter as soon as this level of contamination reaches some unacceptable threshold.
Now one way to know when to change the oil is to run an analysis of the oil.
This has its pluses and minuses, which I won't cover.
Another way is to just pick a reasonable mileage number and change the oil. For a car with a new engine I like an oil/filter change around or even a bit before 1000 miles, and another at 2000 miles (1000 miles later) at the end of "break in".
Then another oil change 3000 miles later, at 5000 miles, and then every 5K miles for as one owns the car.
I followed a schedule similar to the one above with my 02 Boxster and it has over 231K miles on its original engine and the engine runs as good today as it did when I first brought the car home from the dealer.
Anyhow, if it hasn't been changed in a while, say 5K miles, or if the wrong oil was used, it might be worthwhile (very worthwhile in fact required if the wrong oil was used) to change the oil and see if fresh oil reduces the noise.
I will add temperature affects cars in strange ways. Cars are just noiser in colder weather. Sound carries better in a cold car and in cooler air. This is true even if the engine/drivetrain up to operating temperature.
Clearances are funny things too. Heat up a block of metal a block with a hole in it, a relatively small hole in relationship to the size of the block, and the hole's diameter gets smaller before it gets larger.
Components that depend upon the castings or fabrications in which they are assembled for their positional relationships with their mating components can gain some additional clearance between their related components, theoretically.
Transmission and engine castings expand when hot. So of course do heads and camshaft platforms.
In the transmission the various parallel shafts grow apart as the tranmission cases heat up but the gears swell/expand from the heat as they heat up so dimensions between the various mating gear sets stay rather relative.
In the case of the camshafts, as the aluminum in which the camshaft is held and in which it rotates heats up this works to increase the clearance between the cam lobes and the valve lifters. Now the lifters have zero valve lash feature which compensates for this to some extent but these lifters are also fed ever increasingly warmer engine oil which of course heats these components so they grow dimensionally (in all directions) and the same relative clearances are maintained with the bore the lifter resides in and with components (cam lobe mainly) it of course interfaces with.
Generally a noise that worsens when the engine is hot is related to oil supply or oil pressure. But this doesn't mean every noise is. Another source of a noise that can get worse as the engine heats up is an exhaust leak. Another is a loose or even cracked/defective spark plug. There are of course more possible sources of noises. To complicate things, many of these noise sources can be noisy when the engine is cold and can quiet down as the engine heats up.
Sincerely,
Macster.
Too many owners -- and through no fault of their own other than relying upon in my opinion (and I'm not alone in this) much too extended oil/filter service intervals -- leave the engine oil in the engine too long. Now a new engine is particularly prone to the contaminating its oil with unburned gasoline and water. This is natural for a new engine to do and in fact to a lesser extent any engine to do.
The only way to deal with this is to change the engine oil/filter as soon as this level of contamination reaches some unacceptable threshold.
Now one way to know when to change the oil is to run an analysis of the oil.
This has its pluses and minuses, which I won't cover.
Another way is to just pick a reasonable mileage number and change the oil. For a car with a new engine I like an oil/filter change around or even a bit before 1000 miles, and another at 2000 miles (1000 miles later) at the end of "break in".
Then another oil change 3000 miles later, at 5000 miles, and then every 5K miles for as one owns the car.
I followed a schedule similar to the one above with my 02 Boxster and it has over 231K miles on its original engine and the engine runs as good today as it did when I first brought the car home from the dealer.
Anyhow, if it hasn't been changed in a while, say 5K miles, or if the wrong oil was used, it might be worthwhile (very worthwhile in fact required if the wrong oil was used) to change the oil and see if fresh oil reduces the noise.
I will add temperature affects cars in strange ways. Cars are just noiser in colder weather. Sound carries better in a cold car and in cooler air. This is true even if the engine/drivetrain up to operating temperature.
Clearances are funny things too. Heat up a block of metal a block with a hole in it, a relatively small hole in relationship to the size of the block, and the hole's diameter gets smaller before it gets larger.
Components that depend upon the castings or fabrications in which they are assembled for their positional relationships with their mating components can gain some additional clearance between their related components, theoretically.
Transmission and engine castings expand when hot. So of course do heads and camshaft platforms.
In the transmission the various parallel shafts grow apart as the tranmission cases heat up but the gears swell/expand from the heat as they heat up so dimensions between the various mating gear sets stay rather relative.
In the case of the camshafts, as the aluminum in which the camshaft is held and in which it rotates heats up this works to increase the clearance between the cam lobes and the valve lifters. Now the lifters have zero valve lash feature which compensates for this to some extent but these lifters are also fed ever increasingly warmer engine oil which of course heats these components so they grow dimensionally (in all directions) and the same relative clearances are maintained with the bore the lifter resides in and with components (cam lobe mainly) it of course interfaces with.
Generally a noise that worsens when the engine is hot is related to oil supply or oil pressure. But this doesn't mean every noise is. Another source of a noise that can get worse as the engine heats up is an exhaust leak. Another is a loose or even cracked/defective spark plug. There are of course more possible sources of noises. To complicate things, many of these noise sources can be noisy when the engine is cold and can quiet down as the engine heats up.
Sincerely,
Macster.
if you don't put 5k miles on your car in 1yr then what is an acceptable time to change it? also just picked my up with 1600miles and it is an early 07. dealer did the 30k service i have about 2000k on it now. when should i change it next based on break in? i put about 5k a year on my porsches.
10-10-2010, 07:50 PM
#19
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Guys a strong recommendation is to run a 5W40 Mobil 1 Turbo Diesel Truck or M1 5W50. I wouldn't be stretching the oil change over 5K.. I'd be changing the fluids and filter closer to 4K...
10-11-2010, 10:45 PM
#20
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I have an 07 with 16,500 and its made that noise since new. Asked the same questions, got the same answers and it still runs like a top. Its a race car masquerading as a street car so you can here her working under her skirt.
The early 90's P-cars 964 had a shroud under the engine so they could pass Swiss noise emissions...its what they do. You have warranty..put on an exhaust to let her breath and you'll wonder where that noise went
The early 90's P-cars 964 had a shroud under the engine so they could pass Swiss noise emissions...its what they do. You have warranty..put on an exhaust to let her breath and you'll wonder where that noise went
10-16-2010, 01:48 AM
#21
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Hello all. My first post here for some opinions. Appologies for the long post.
I purchased an 07 997 turbo basalt black 14k miles coupe from a main Porsche dealer in the UK. This was 6 weeks ago, the car is under warranty. After a few days I noticed a slight rattling that could be heard when the revs are between 1400 - 2000rpm ie just enough throttle to keep the car moving. When I say slight, if the air conditioning is blowing or the radio on fairly low you cannot really hear it.
You can hear it from outside the car though.
So, phoned up the main Porsche dealer in Hatfield car was looked at by one of their top mechanics. He said, its normal, its a characteristic of the engine, they are a gt1 derived engine and do get a bit of gear noise from the rear of the engine as gear meets gear instead of belts. The sound kinda got under my skin and I ended up with the air con off and radio off just listening to it! a bit obsessive I know.
Again, 1 week later, spoke to Porsche Hatfield who arranged for their master mechanic to take a look. Again, same explanation, said they aren't as quiet as the normally aspirated engines and that the bulk of the engine is fairly primative. Said that when I am slowly accelerating the gears between the IMS and crank thrash a bit. Some are noisier than others, this one is not that noisy he said and is normal.
Still concerned I drove to another Porsche main dealer in the UK unrealated to the Hatfield dealer. They said, dont worry about it, it is normal. When they listened to the sound to start with it took a bit for them to realise what I was actually going on about.
Ok, another few days later. Phoned Hatfield main dealer, moaned saying the noise is irritating they said ok bring it in. Took it back, they gave me a brand new boxster hire car. They said that their engineers are saying there is no problem with the engine whatsoever and that they are sending my car to Porsche Reading, the Porsche UK head office to get another opinion. The car was gone 10 days. The top guys in the UK tested the car fully and reported that the car was normal, everything within tolerances, said if they thought there was a problem they'd repair it under warranty.
You can probably all tell by now I have possibly gone over the top, but I just believe that the car should be quiet.
Still annoyed I met with the Hatfield director and a few from his team. Said I cant believe it should sound like that, didn't hear it in my 997 4s cab. After pushing for 1/2 hr they said if they take the engine appart check everything and put it back together and it still makes the same sound 'as it is a characteristic' will I be happy. I said providing they check yes. They said they would check bearing tolerances etc. So, without my car for another 13 days. They called when they had seperated the gearbox from the engine and said they think they believe the flywheel isn't springing back properly and that the clutch could do with replacing. They said this would likely quiet things down a bit as the flywheel might not be damping properly. Meanwhile, I went out in another turbo and could make out the same sort of sound but not as pronounced.
Got the car back, not really any improvement, Porsche are pretty much saying the car is NORMAL you need to understand it is a race engine etc etc.
So I decided to put my radio back on and forget it. But then I didn't have my radio on one day and I could make out the same noise, not loud, just there.
I took the car to an independent Porsche specialist for an unbiased opinion. The technical director listened to the car and said that they do do that quite often and that its just a bit of play between gears. Dont worry about it the engine is fine. I said If I were to trade the car in to you would that noise effect the value. He said no, its a small noise.
So guys what do you make of all this, am I being OTT?
I purchased an 07 997 turbo basalt black 14k miles coupe from a main Porsche dealer in the UK. This was 6 weeks ago, the car is under warranty. After a few days I noticed a slight rattling that could be heard when the revs are between 1400 - 2000rpm ie just enough throttle to keep the car moving. When I say slight, if the air conditioning is blowing or the radio on fairly low you cannot really hear it.
You can hear it from outside the car though.So, phoned up the main Porsche dealer in Hatfield car was looked at by one of their top mechanics. He said, its normal, its a characteristic of the engine, they are a gt1 derived engine and do get a bit of gear noise from the rear of the engine as gear meets gear instead of belts. The sound kinda got under my skin and I ended up with the air con off and radio off just listening to it! a bit obsessive I know.
Again, 1 week later, spoke to Porsche Hatfield who arranged for their master mechanic to take a look. Again, same explanation, said they aren't as quiet as the normally aspirated engines and that the bulk of the engine is fairly primative. Said that when I am slowly accelerating the gears between the IMS and crank thrash a bit. Some are noisier than others, this one is not that noisy he said and is normal.
Still concerned I drove to another Porsche main dealer in the UK unrealated to the Hatfield dealer. They said, dont worry about it, it is normal. When they listened to the sound to start with it took a bit for them to realise what I was actually going on about.
Ok, another few days later. Phoned Hatfield main dealer, moaned saying the noise is irritating they said ok bring it in. Took it back, they gave me a brand new boxster hire car. They said that their engineers are saying there is no problem with the engine whatsoever and that they are sending my car to Porsche Reading, the Porsche UK head office to get another opinion. The car was gone 10 days. The top guys in the UK tested the car fully and reported that the car was normal, everything within tolerances, said if they thought there was a problem they'd repair it under warranty.
You can probably all tell by now I have possibly gone over the top, but I just believe that the car should be quiet.
Still annoyed I met with the Hatfield director and a few from his team. Said I cant believe it should sound like that, didn't hear it in my 997 4s cab. After pushing for 1/2 hr they said if they take the engine appart check everything and put it back together and it still makes the same sound 'as it is a characteristic' will I be happy. I said providing they check yes. They said they would check bearing tolerances etc. So, without my car for another 13 days. They called when they had seperated the gearbox from the engine and said they think they believe the flywheel isn't springing back properly and that the clutch could do with replacing. They said this would likely quiet things down a bit as the flywheel might not be damping properly. Meanwhile, I went out in another turbo and could make out the same sort of sound but not as pronounced.
Got the car back, not really any improvement, Porsche are pretty much saying the car is NORMAL you need to understand it is a race engine etc etc.
So I decided to put my radio back on and forget it. But then I didn't have my radio on one day and I could make out the same noise, not loud, just there.
I took the car to an independent Porsche specialist for an unbiased opinion. The technical director listened to the car and said that they do do that quite often and that its just a bit of play between gears. Dont worry about it the engine is fine. I said If I were to trade the car in to you would that noise effect the value. He said no, its a small noise.
So guys what do you make of all this, am I being OTT?
10-19-2010, 02:13 AM
#22
I have a 2007 997 TT that also has that rattling marble noise at idle. I noticed it at 15k miles and it got worse at around 22k. After bringing it to the dealer several times I got the "its normal" answer. Some cars are just noisier than others. Mine only occurs at idle when the car is warm (not cold). I do all my own oil changes every 4-5k miles and I notice it get louder right after the oil change (mobile 0w-40) After doing a lot of research i decided to take Kevins advise and put in oil with a thicker viscosity. I could not find 5w-40 mobile 1 so I went with 5w-50 Castrol Syntec. The noise is still there but has gotten quieter. I would say 30-40% quieter. I am keeping my fingers crossed that it will stay that way. So far so good.
02-08-2011, 04:05 AM
#24
Glad to see this thorough discussion and to hear more reports that this is normal. Mine is a 07 GT3 with the same rattle at ~2k rpm and was told that it's normal after visiting 2 different dealers in the area. They had the belt off and compared it with another GT3 which had the same noise. Perhaps this is a noise specific to the GT1-derived engine. Wonder if anyone knows if other 997 has a similar rattle.
02-09-2011, 06:29 AM
#25
Kevin I have a quick question. I switched to Castrol 5w-50 from mobil 1 0w-40 and it seemed to help with this "noise issue". Weired how the noise is more prevalent right after an oil change ( Which I do myself every 4-5k miles). Since I cant get Mobil 1 5w-50 here in CA. is there another brand you can reccomend and how thick (viscosity) can I get away with? is Castrol 5w-50 thick enough or should I look for something else? Appreciate any advise you can give me.
Anyone else have this issue and have resolved or help quiet things up? I know its normal but it is still annoying.
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02-09-2011, 02:26 PM
#26
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Gradyex, I don't like Castrol> I see to much "coke" being built up with Castrol in turbo applications.
If you did in past Rennlist oil threads you will see a major commercial Mobil supplier that stocks the 5W50 in your neck of the woods. You will NOT get the oil in a retail stock.
Do you pull your fuse to your fuel pumps? So you can pre-prime your oil system prior to startup? If you have noise run 5W40 TDT > there is a metal conditioning additive that will reduce your engine noise.
Thre is a long thread on the 996TT side..
If you did in past Rennlist oil threads you will see a major commercial Mobil supplier that stocks the 5W50 in your neck of the woods. You will NOT get the oil in a retail stock.
Do you pull your fuse to your fuel pumps? So you can pre-prime your oil system prior to startup? If you have noise run 5W40 TDT > there is a metal conditioning additive that will reduce your engine noise.
Thre is a long thread on the 996TT side..
02-10-2011, 12:10 AM
#27
Race Director
Kevin I have a quick question. I switched to Castrol 5w-50 from mobil 1 0w-40 and it seemed to help with this "noise issue". Weired how the noise is more prevalent right after an oil change ( Which I do myself every 4-5k miles). Since I cant get Mobil 1 5w-50 here in CA. is there another brand you can reccomend and how thick (viscosity) can I get away with? is Castrol 5w-50 thick enough or should I look for something else? Appreciate any advise you can give me.
Anyone else have this issue and have resolved or help quiet things up? I know its normal but it is still annoying.
Anyone else have this issue and have resolved or help quiet things up? I know its normal but it is still annoying.
Oh, 510 732-5926 is the phone number.
Sincerely,
Macster.
03-22-2011, 01:59 AM
#28
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I have to say, I feel a whole lot better after reading this post (no pun intended). Sorry, I am not an active person on the forum but I have been on and off since 2006 (and I think some of you may recall my little dilemma dealing with Beverly Hill Porsche for my poor experience with my GT3 purchase - which is a completely true but sad story). I got an 07 TT Tip brand new but due to my work commitment and travel, I have not had the pleasure to enjoy the car to the fullest until the past 6-9 months ago. To-date, I have just managed to clock 10k miles.
For a long time, I never really paid attention to the noise issue. The reason is because I thought it was the PCCB's pad grinding against the rotor, or that maybe the car is just not warmed up properly when I drove it off. However, it wasn't until recently that my friend and his wife sat in my car and told me about the noise. Since then, I got very paranoid and I drove it a lot more to diagnose what's going on. I have bought in to the dealership several times and every time the guys would tell me it is "normal". The weird thing is that the noise is most noticeable between 1500 to 2000rpm. So yesterday, I brought the car in once again just because the grinding noise is so awful. So finally this time they had the master mechanic rode with me and later called me back several hours later and said after extensive diagnostic on the situation, the noise is basically something that they cannot fix. I can't remember the exact detail but I remembered he said it has to do with the fact that the engine block is handmade and one of the gears for the drive shaft is not (they used to for the 930 days but stopped since 993). He also added that the noise situation varies from car to car. Mine so happened to be louder than the average. He assured me that the car is in perfect working order and I should have nothing to worry about.
For a long time, I never really paid attention to the noise issue. The reason is because I thought it was the PCCB's pad grinding against the rotor, or that maybe the car is just not warmed up properly when I drove it off. However, it wasn't until recently that my friend and his wife sat in my car and told me about the noise. Since then, I got very paranoid and I drove it a lot more to diagnose what's going on. I have bought in to the dealership several times and every time the guys would tell me it is "normal". The weird thing is that the noise is most noticeable between 1500 to 2000rpm. So yesterday, I brought the car in once again just because the grinding noise is so awful. So finally this time they had the master mechanic rode with me and later called me back several hours later and said after extensive diagnostic on the situation, the noise is basically something that they cannot fix. I can't remember the exact detail but I remembered he said it has to do with the fact that the engine block is handmade and one of the gears for the drive shaft is not (they used to for the 930 days but stopped since 993). He also added that the noise situation varies from car to car. Mine so happened to be louder than the average. He assured me that the car is in perfect working order and I should have nothing to worry about.
Hello all. My first post here for some opinions. Appologies for the long post.
I purchased an 07 997 turbo basalt black 14k miles coupe from a main Porsche dealer in the UK. This was 6 weeks ago, the car is under warranty. After a few days I noticed a slight rattling that could be heard when the revs are between 1400 - 2000rpm ie just enough throttle to keep the car moving. When I say slight, if the air conditioning is blowing or the radio on fairly low you cannot really hear it. You can hear it from outside the car though.
So, phoned up the main Porsche dealer in Hatfield car was looked at by one of their top mechanics. He said, its normal, its a characteristic of the engine, they are a gt1 derived engine and do get a bit of gear noise from the rear of the engine as gear meets gear instead of belts. The sound kinda got under my skin and I ended up with the air con off and radio off just listening to it! a bit obsessive I know.
Again, 1 week later, spoke to Porsche Hatfield who arranged for their master mechanic to take a look. Again, same explanation, said they aren't as quiet as the normally aspirated engines and that the bulk of the engine is fairly primative. Said that when I am slowly accelerating the gears between the IMS and crank thrash a bit. Some are noisier than others, this one is not that noisy he said and is normal.
Still concerned I drove to another Porsche main dealer in the UK unrealated to the Hatfield dealer. They said, dont worry about it, it is normal. When they listened to the sound to start with it took a bit for them to realise what I was actually going on about.
Ok, another few days later. Phoned Hatfield main dealer, moaned saying the noise is irritating they said ok bring it in. Took it back, they gave me a brand new boxster hire car. They said that their engineers are saying there is no problem with the engine whatsoever and that they are sending my car to Porsche Reading, the Porsche UK head office to get another opinion. The car was gone 10 days. The top guys in the UK tested the car fully and reported that the car was normal, everything within tolerances, said if they thought there was a problem they'd repair it under warranty.
You can probably all tell by now I have possibly gone over the top, but I just believe that the car should be quiet.
Still annoyed I met with the Hatfield director and a few from his team. Said I cant believe it should sound like that, didn't hear it in my 997 4s cab. After pushing for 1/2 hr they said if they take the engine appart check everything and put it back together and it still makes the same sound 'as it is a characteristic' will I be happy. I said providing they check yes. They said they would check bearing tolerances etc. So, without my car for another 13 days. They called when they had seperated the gearbox from the engine and said they think they believe the flywheel isn't springing back properly and that the clutch could do with replacing. They said this would likely quiet things down a bit as the flywheel might not be damping properly. Meanwhile, I went out in another turbo and could make out the same sort of sound but not as pronounced.
Got the car back, not really any improvement, Porsche are pretty much saying the car is NORMAL you need to understand it is a race engine etc etc.
So I decided to put my radio back on and forget it. But then I didn't have my radio on one day and I could make out the same noise, not loud, just there.
I took the car to an independent Porsche specialist for an unbiased opinion. The technical director listened to the car and said that they do do that quite often and that its just a bit of play between gears. Dont worry about it the engine is fine. I said If I were to trade the car in to you would that noise effect the value. He said no, its a small noise.
So now that I have read your post, I guess it is a normal thing and that I can move on and just enjoy driving it.
So guys what do you make of all this, am I being OTT?
I purchased an 07 997 turbo basalt black 14k miles coupe from a main Porsche dealer in the UK. This was 6 weeks ago, the car is under warranty. After a few days I noticed a slight rattling that could be heard when the revs are between 1400 - 2000rpm ie just enough throttle to keep the car moving. When I say slight, if the air conditioning is blowing or the radio on fairly low you cannot really hear it.
You can hear it from outside the car though.So, phoned up the main Porsche dealer in Hatfield car was looked at by one of their top mechanics. He said, its normal, its a characteristic of the engine, they are a gt1 derived engine and do get a bit of gear noise from the rear of the engine as gear meets gear instead of belts. The sound kinda got under my skin and I ended up with the air con off and radio off just listening to it! a bit obsessive I know.
Again, 1 week later, spoke to Porsche Hatfield who arranged for their master mechanic to take a look. Again, same explanation, said they aren't as quiet as the normally aspirated engines and that the bulk of the engine is fairly primative. Said that when I am slowly accelerating the gears between the IMS and crank thrash a bit. Some are noisier than others, this one is not that noisy he said and is normal.
Still concerned I drove to another Porsche main dealer in the UK unrealated to the Hatfield dealer. They said, dont worry about it, it is normal. When they listened to the sound to start with it took a bit for them to realise what I was actually going on about.
Ok, another few days later. Phoned Hatfield main dealer, moaned saying the noise is irritating they said ok bring it in. Took it back, they gave me a brand new boxster hire car. They said that their engineers are saying there is no problem with the engine whatsoever and that they are sending my car to Porsche Reading, the Porsche UK head office to get another opinion. The car was gone 10 days. The top guys in the UK tested the car fully and reported that the car was normal, everything within tolerances, said if they thought there was a problem they'd repair it under warranty.
You can probably all tell by now I have possibly gone over the top, but I just believe that the car should be quiet.
Still annoyed I met with the Hatfield director and a few from his team. Said I cant believe it should sound like that, didn't hear it in my 997 4s cab. After pushing for 1/2 hr they said if they take the engine appart check everything and put it back together and it still makes the same sound 'as it is a characteristic' will I be happy. I said providing they check yes. They said they would check bearing tolerances etc. So, without my car for another 13 days. They called when they had seperated the gearbox from the engine and said they think they believe the flywheel isn't springing back properly and that the clutch could do with replacing. They said this would likely quiet things down a bit as the flywheel might not be damping properly. Meanwhile, I went out in another turbo and could make out the same sort of sound but not as pronounced.
Got the car back, not really any improvement, Porsche are pretty much saying the car is NORMAL you need to understand it is a race engine etc etc.
So I decided to put my radio back on and forget it. But then I didn't have my radio on one day and I could make out the same noise, not loud, just there.
I took the car to an independent Porsche specialist for an unbiased opinion. The technical director listened to the car and said that they do do that quite often and that its just a bit of play between gears. Dont worry about it the engine is fine. I said If I were to trade the car in to you would that noise effect the value. He said no, its a small noise.
So now that I have read your post, I guess it is a normal thing and that I can move on and just enjoy driving it.
So guys what do you make of all this, am I being OTT?
03-22-2011, 02:26 PM
#29
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Yes! Turbos need a squirt of lube. Not sure which model years are effected, but my usa-sold 2007 got the turbos lubed last time I took it in.
I wish I were more resourceful and could provide a link to you.
Nevertheless, I'm sure it's easy to learn about somewhere in these forums.
I wish I were more resourceful and could provide a link to you.
Nevertheless, I'm sure it's easy to learn about somewhere in these forums.
https://rennlist.com/forums/997-turb...ease-read.html
I think Mike had some on it at:
http://www.awe-tuning.com/media/pdf/...e%20action.pdf
03-22-2011, 05:10 PM
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Check your oil filters and IF you have noise > modify your oil change schedule.. 5000 miles or sooner is my recommendation. Changing to Mobil 1 5W40 TDT will reduce your IMS noise.
Check your oil filters and IF you have noise > modify your oil change schedule.. 5000 miles or sooner is my recommendation. Changing to Mobil 1 5W40 TDT will reduce your IMS noise.