So, what does an IMS failure sound like?
09-07-2009, 03:25 PM
#1
Rennlist Member
Thread Starter
So, what does an IMS failure sound like?
went on a 450 mile drive yesterday. Half way through (going through the town of San Luis Obispo), as I'm pulling into the gas station, I hear a horrid noise that sounds suspiciously like rod knock.
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
09-07-2009, 03:58 PM
#3
Rennlist Member
Thread Starter
oh, it's a knock alright
specially when the a/c wasn't even on. It's got bass to it and it's coming from the passenger side, I think. I didn't keep on running the engine. As soon as i heard it, the car was off. Odd, because I was literally pulling up to the gas station.
09-07-2009, 04:51 PM
#4
Drifting
I think it sounds like this: "...cha - CHIIIINNNGGGGGG!
went on a 450 mile drive yesterday. Half way through (going through the town of San Luis Obispo), as I'm pulling into the gas station, I hear a horrid noise that sounds suspiciously like rod knock.
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
09-07-2009, 06:19 PM
#6
Parts Specialist
Rennlist Member
Rennlist Member
mine ticks
there is an air valve that does that, but I am guessing the OP has an issue. Just so you know and AOS going out can make one hell of a loud sound that some have compared to a whale hitting the concrete after being dropped out of an airplane...
I would not run the car - relax until you get the diagnosis.... hopefully it wont be a major deal. I understand your fear though -
Good luck and post the shops findings
there is an air valve that does that, but I am guessing the OP has an issue. Just so you know and AOS going out can make one hell of a loud sound that some have compared to a whale hitting the concrete after being dropped out of an airplane...
I would not run the car - relax until you get the diagnosis.... hopefully it wont be a major deal. I understand your fear though -
Good luck and post the shops findings
09-07-2009, 06:30 PM
#7
Rennlist Member
Thread Starter
mine ticks
there is an air valve that does that, but I am guessing the OP has an issue. Just so you know and AOS going out can make one hell of a loud sound that some have compared to a whale hitting the concrete after being dropped out of an airplane...
I would not run the car - relax until you get the diagnosis.... hopefully it wont be a major deal. I understand your fear though -
Good luck and post the shops findings
there is an air valve that does that, but I am guessing the OP has an issue. Just so you know and AOS going out can make one hell of a loud sound that some have compared to a whale hitting the concrete after being dropped out of an airplane...
I would not run the car - relax until you get the diagnosis.... hopefully it wont be a major deal. I understand your fear though -
Good luck and post the shops findings
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09-07-2009, 06:34 PM
#8
Parts Specialist
Rennlist Member
Rennlist Member
I really dont know, I changed my AOS prior to it making any sounds or CEL's - I would have a sick feeling in my belly if I was in your shoes, BUT there have baan many cases where the dreaded noise of death turned out to be something simple...
here's wishing you the best my friend!!!
here's wishing you the best my friend!!!
09-07-2009, 06:36 PM
#9
Rocky Mountain High
Rennlist Member
Rennlist Member
Good luck. I hope it is something simple and inexpensive...
09-07-2009, 06:52 PM
#10
Race Director
went on a 450 mile drive yesterday. Half way through (going through the town of San Luis Obispo), as I'm pulling into the gas station, I hear a horrid noise that sounds suspiciously like rod knock.
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
What was last service done to car?
If plugs might be a loose plug.
Could be bad serpentine belt.
Sure, could be bad rod or even main bearing.
But could be a broken valve spring.
Could be any number of things.
Worse case is it is something internal to the engine. Main or rod bearing. Or incipient IMS failure.
If internal to engine, almost certainly engine will have to come out of car and cases split. Or if noise confined to head perhaps just a camshaft cover removed.
Upon limited tear down and inspection mechanic might find the problem to be a jumped chain or a bad chain guide, tensioner, or even a bad scavenge pump.
Your options are to replace engine with new one sourced from dealer and installed by dealer. This expensive up front but does provide you with a new engine backed by warranty on parts and labor should new engine go boom in 2 years, 24K miles or whatever warranty period is.
You could have indy install new engine but if engine bad... It is rare but has happened. Read of one instance where indy installed new engine and found new engine bad. Managed to convince dealership new engine bad but it took some time and effort and to his credit this indy took the time and put out the effort, though car's owner might have footed some of the indy's time.
Or have qualified indy source engine from a Porsche focused salvage yard or business. (PartsHeaven in Hayward CA sources engines salvaged from cars and there are others: Oklahoma Foreign, some place near Mami Fl. PCA magazine or Excellence carry ads for some these places.) Risky cause you don't know what you're getting but good indy should be good at inspecting/checking out engine, go to location prepared to perform a compression test provided engine in condition to be started and run.
But if engine comes from a ways away... You and your indy at mercy of the reputation of the provider of the engine and how well it stands behind its engines.
Almost equally risky is to have original engine torn down and fixed. Unless shop top notch Porsche engine rebuild shop...And a good one is going to be expensive.
Sincerely,
Macster.
09-07-2009, 06:58 PM
#11
Race Director
went on a 450 mile drive yesterday. Half way through (going through the town of San Luis Obispo), as I'm pulling into the gas station, I hear a horrid noise that sounds suspiciously like rod knock.
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
Yes, a slight amount of throttle, the sound changes, so I know it's not a loose exhaust banging away.
To those in the know, what could be this be? A quick call to my indy mechanic and he says it can be anything from camshaft failure to IMS, to bottom end.
But I guess the silver lining is that the gas station was less than a 100 yards away from SGS Porsche shop, which apparently is the top dog in central coast when it comes to all things Porsche.
I pushed the car in their driveway, and left my keys and envelope. They open tomorrow so we'll know.
I'm not really all that prepared for such a huge expense on a 90K mile car.
What are my options if it's the worse case scenario?
"Experience w/ core charge and Porsche?"
Has some new/used engine replacement info and pricing you might find interesting.
Sincerely,
Macster.
09-07-2009, 07:12 PM
#12
Rennlist Member
Thread Starter
Could be something less than catastrophic.
What was last service done to car?
If plugs might be a loose plug.
Could be bad serpentine belt.
Sure, could be bad rod or even main bearing.
But could be a broken valve spring.
Could be any number of things.
Worse case is it is something internal to the engine. Main or rod bearing. Or incipient IMS failure.
If internal to engine, almost certainly engine will have to come out of car and cases split. Or if noise confined to head perhaps just a camshaft cover removed.
Upon limited tear down and inspection mechanic might find the problem to be a jumped chain or a bad chain guide, tensioner, or even a bad scavenge pump.
Your options are to replace engine with new one sourced from dealer and installed by dealer. This expensive up front but does provide you with a new engine backed by warranty on parts and labor should new engine go boom in 2 years, 24K miles or whatever warranty period is.
You could have indy install new engine but if engine bad... It is rare but has happened. Read of one instance where indy installed new engine and found new engine bad. Managed to convince dealership new engine bad but it took some time and effort and to his credit this indy took the time and put out the effort, though car's owner might have footed some of the indy's time.
Or have qualified indy source engine from a Porsche focused salvage yard or business. (PartsHeaven in Hayward CA sources engines salvaged from cars and there are others: Oklahoma Foreign, some place near Mami Fl. PCA magazine or Excellence carry ads for some these places.) Risky cause you don't know what you're getting but good indy should be good at inspecting/checking out engine, go to location prepared to perform a compression test provided engine in condition to be started and run.
But if engine comes from a ways away... You and your indy at mercy of the reputation of the provider of the engine and how well it stands behind its engines.
Almost equally risky is to have original engine torn down and fixed. Unless shop top notch Porsche engine rebuild shop...And a good one is going to be expensive.
Sincerely,
Macster.
What was last service done to car?
If plugs might be a loose plug.
Could be bad serpentine belt.
Sure, could be bad rod or even main bearing.
But could be a broken valve spring.
Could be any number of things.
Worse case is it is something internal to the engine. Main or rod bearing. Or incipient IMS failure.
If internal to engine, almost certainly engine will have to come out of car and cases split. Or if noise confined to head perhaps just a camshaft cover removed.
Upon limited tear down and inspection mechanic might find the problem to be a jumped chain or a bad chain guide, tensioner, or even a bad scavenge pump.
Your options are to replace engine with new one sourced from dealer and installed by dealer. This expensive up front but does provide you with a new engine backed by warranty on parts and labor should new engine go boom in 2 years, 24K miles or whatever warranty period is.
You could have indy install new engine but if engine bad... It is rare but has happened. Read of one instance where indy installed new engine and found new engine bad. Managed to convince dealership new engine bad but it took some time and effort and to his credit this indy took the time and put out the effort, though car's owner might have footed some of the indy's time.
Or have qualified indy source engine from a Porsche focused salvage yard or business. (PartsHeaven in Hayward CA sources engines salvaged from cars and there are others: Oklahoma Foreign, some place near Mami Fl. PCA magazine or Excellence carry ads for some these places.) Risky cause you don't know what you're getting but good indy should be good at inspecting/checking out engine, go to location prepared to perform a compression test provided engine in condition to be started and run.
But if engine comes from a ways away... You and your indy at mercy of the reputation of the provider of the engine and how well it stands behind its engines.
Almost equally risky is to have original engine torn down and fixed. Unless shop top notch Porsche engine rebuild shop...And a good one is going to be expensive.
Sincerely,
Macster.
The indy shop is pretty reputable, but they don't know yet that my car is there, although tomorrow morning, they will since I had to leave the car there.
I really hope it's not the worse.
09-17-2009, 07:03 PM
#15
Burning Brakes
Join Date: Jan 2005
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Mine knocked a little after sitting awhile and the loss of oil which was on garage floor. Here is what you wanted lets hope it does not sound this bad.
Faster ver adobe flash
http://www.webbspot.com/Porsche/video/blownengine.swf
Slow ver
http://www.webbspot.com/Porsche/video/blownengine.wmv
Faster ver adobe flash
http://www.webbspot.com/Porsche/video/blownengine.swf
Slow ver
http://www.webbspot.com/Porsche/video/blownengine.wmv
Last edited by Mother; 09-17-2009 at 07:51 PM.