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What to replace/upgrade along with RMS repair ?

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Hello everybody !

This is my first post here, I have been told it is a good place for technical advice.

My car is a 2000 986S manual, with 66k miles. Had a RMS replaced once. Now seems to be wet of oil again. No puddle on the floor and under a quart oil usage in 5-6000 miles.

IF I decide to do the RMS (got extended warranty with warrantec):

What are all the parts I should replace to make sure I did all to prevent it from recurring?

What other parts to replace ? Clutch is original and works fine considering miles but probably I would replace it.

I experience a vibration when letting the engine slow down the car as it passes 3000rpm. I have been told to exchange flywheel, clean throttle body, fix engine mounts... The Porsche tech drove it and said it is normal engine vibration but it seems a bit too strong to be normal to me !

Possible (performace?) upgrades I can think of is so far only a lighter flywheel. Any drawbacks with that ? If Porsche did not make it lighter then maybe for a reason...

Thanks for any help - this could save me alot of $$$ if I plan well before letting them rip my dear Boxster apart...

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Make sure they check both the intermediate shaft seal and the rear main seal - they can both leak, and could possibly both need to be replaced.

While you're in there, you could put in a lightweight flywheel. You might also think about a new clutch, if you haven't done that already. Engine mounts are probably somewhat easier to get to, but unless they have a problem, I wouldn't replace them. Throttle body is not any easier to replace with the transmission out.

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A lighter flywheel is fine for a track car. You may not like it in stop and go traffic. A heavy flywheel is used to make the car driveable on the street. The dual-mass flywheel is used so the driver does not hear gearbox noise. A lighter flywheel permits the car to rev up and down faster - it does not increase power.

The front engine mount on the early cars had a problem but it is obvious when the car is on the lift. The rubber bushing slides out of it's housing and the engine shifts to the side permitting it to vibrate against the body. There is a new style mount but I forget when it went into production.

The mechanic can check the condition of the dual mass flywheel once the transmission is out of the car.

At 66k miles replace the pressure plate, disc, and release bearing. There is a kit with all 3 parts. You should only pay for the parts as it does not take any longer to put your old or a new clutch back in.

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The clutch is made by Sachs so there is nothing to gain from buying it from Porsche. If you want to buy it from Porsche then check with Sunset Imports in Oregon. I even see them from time to time on ebay.

If your vibration is from the flywheel then that is an expensive part.


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So would you recommend to just let the dealer get the parts because I cannot save much by buying directly from Sachs ?

If the flywheel is really so expensive I have to think about it again.. as there is no way to know whether it is really the cause of the vibration and the vibration contributing to the leakage of the seals.

Great forum here ! I am writing down all these pieces of information !

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They can drop the engine to check for leaks around the side of engine too in case your lead isn't just RMS. 


In an RMS replacement they drop the transmission and the engine stays in place (with a special tool to hold it). Valve covers and exhaust covers are also know leakers. A good shop will always look for ALL the leaks.
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