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Your help needed on 996 engine noise!!!

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Old 10-20-2012 | 04:02 AM
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Default Your help needed on 996 engine noise!!! UPdate Update!!!!!!!

Hello All
I bought 2000 Porsche 996 Carrera Cab. with 155K, the car is stunning condition with lots records, The car has been sitting in Garage for couple year.Yes I did know it sat for long while, well the Pr owner which older is nice older Gentleman in 70's , told me one day after he drove the car home and parked in his garage, the next day he could not start it, towed to local Porsche dealer, they told the engine is Seized and he need new engine which was odd!!!! After he get shock of his life on cost new/ reman engine, he decided to wait for while, then to towed car back home, which parked in garage which it sat for couple years, I guess after looking long and hard he decided to sell it. I bought the car, to be honest with you
a) the car is such great shape , that you would think it just came from factory no scratches or dents, and paint is really in fantastic shape
b) the price was very right!!!

The pr owner was straight with me and give all the info that he know about the car, anyway I bought the car and then towed the car home ,after fully charging battery over night, making sure it has oil, tried to cranked the engine, just click click, I though the engine is frozen , then I took the belt off , to see if the engine is moves by hand or not, I hand cracked, engine was moving with no biding, then start the car, the car started but it is making strange noise see the video ,also noticed the alternator was not turning over smoothly,(I think it need to be replaced). Drained the oil and no shaving and did cut the oil filter again no shaving. replaced the oil and oil filter with mobile 1 Syn oil, there is maxing of oil with coolant either direction,so I am not sure were noise coming from?
here is the link for youtube.
http://www.youtube.com/watch?feature...&v=wbJGQZDhpIs
So my thought are
1) it could be IMS? or Valve stuck? timing tensioner? timing chain? or piston slapping around? or????
2) When I put the belt on again trying to start the engine again click click the engine wont turn over, so I think... I know without belt the engine runs.. not very well but , with belt it does not!!!
I really don't want to replace the engine unless I have too.. any input it would much appropriated. Thank you.
Here is the my new ride

And this was my old ride

Last edited by cool hand luke; 10-23-2012 at 12:45 AM.
Old 10-20-2012 | 04:13 AM
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Sounds like a stuck lifter. IMS is more like marbles in a can at the rear (trans side) of the engine, between the trans and engine.
Don't run it more then 15 sec or so without the water pump running or you will llikely crack one of the heads.
Which accessory is dragging so much that the starter can't turn the engine over?
Old 10-20-2012 | 04:22 AM
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Does sound like a stuck lifter. Could check for exhaust leak also checking tightness of header bolts when engine is cold since from the header area sounds simular. Bad thing is the lifters can get mushroomed making the sticking darn near permanent. You can try a new oil change to see if it frees up. Use synthetic like porsche advises might help since its slipperier
Old 10-20-2012 | 04:29 AM
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Thank you guys , I did change the oil with mobile one, How can I check for stuck lifter? I am assuming the engine need to be moved and then heads needs to removed. correct? once the heads are moved how one check for it if the one or more then one lifter is stuck? and if so how one can fix it? thanks
Old 10-20-2012 | 04:42 AM
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It does sound like a lot of work. Removing the valve covers is supposed to require a cam holder that braces the cams in place since the valve covers hold the cam in place. Never tore mine down but I think the cam lobes contact the lifters unlike plain jane systems.

Oh yah some on here have skipped using the cam holders. Some have refretted it while others got away with it.
Old 10-20-2012 | 05:00 AM
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Thank you for the info Pac996 , I guess I need to try to listen with stethoscope to see which cylinder or cylinders have stuck valves , also can you tell me 2000 996 which alternator was used 120 Amp or 150 Amp? I need to replace mine because when I spin the it I could hear bearing not spinning smooth, thanks
Old 10-20-2012 | 05:16 AM
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There's a catalog of parts for the cars online. Spelled with a K - Katalog.
Should be easy to find. 996_USA_KATALOG
I didn't see any listing of amps of generators. No listing of alternators.
A dowel/stick transmits noise down it so you can hear noise from the spot the stick is on.
Old 10-20-2012 | 05:24 AM
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Thank you, I am going to work on the car this weekend, and try to isolate the issues, but I guess raining on Sunday that is good excuse to watch football games :-)
Old 10-20-2012 | 05:58 AM
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thanks I did found the link for all Porsche parts catalog
http://ebookbrowse.com/996-usa-katalog-pdf-d57781049
Old 10-20-2012 | 10:42 AM
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Nice 'looking' cab. Another Rennlister thought his engine was toast, and it turned out to be the alternator. Others will no doubt post their thoughts as well. GL, next time, perhaps a PPI is in order before you purchase.
Old 10-20-2012 | 12:33 PM
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The ticking is too fast to be a lifter noise. Sounds like it's coming from the rotating assembly (piston and crank shaft). If it was a lifter, it would tick half the speed of the rpm (every se ond revolution).
Old 10-20-2012 | 01:20 PM
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Luke,
Great find and a beautiful car. Given the cars high mileage but great condition, looks like it would make a great winter project to go ahead and pull the engine for a rebuild, if possible, or replacement. If you have the room and time, you could do it. If not, call Jake Raby!
Old 10-20-2012 | 03:08 PM
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Thank you Barn996, I know engine could be toast but it was suck nice car and nice deal I could not pass it on there no need PPI since I know the condition of the car to start with, But I think the alternator is toast or at least clutch pulley, I need to take look before, order new alternator.

Imo000 unfortunately I am leaning toward you idea, I hope I am wrong it not rotating assembly (piston and crank shaft), what I need to do is unplug the coil from each cylinder to see if the sounds get littler better or not, but I am hoping it stuck lifter since it has been sitting for while....plus prv owner he did not tell me it has knock on the engine, was honest seller,I do believe him he told me that local Porsche dealer told him in needed new replace new engine( funny thing is I think alternator is bad and since the engine wont turn over they thought it needed new engine!!!) so there no reason not telling me the truth since he thought engine need to be replaced!

KrazyK thank you, I agree although she is high mileage but she has been look after and NOT beater, if it was I would walk away from deal, but when I saw her setting in Garage , if I did not know the mileage I would guess not more then 30K on her! BTW Are you talking about Jake Raby from aircooled technology?

Last edited by cool hand luke; 10-20-2012 at 03:25 PM.
Old 10-20-2012 | 03:13 PM
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Quick question I found engine locally, with 50K and it is from 1999 911, since it cost few $$$$, I want make sure If I need to replace the engine, this will work in case, I do understand the intake are different , one being egas the other is not. can I transfer the my intake from my engine to other engine? do I need to by additional parts? thanks
Old 10-20-2012 | 09:44 PM
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Originally Posted by Imo000
The ticking is too fast to be a lifter noise. Sounds like it's coming from the rotating assembly (piston and crank shaft). If it was a lifter, it would tick half the speed of the rpm (every se ond revolution).
thats my thought and it sounds awful heavy



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