etom

How many miles would you expect a flywheel to last under normal driving conditions, or is this just one of those parts that sometimes lasts forever, or sometimes inexplicably breaks?

How many of you out there have replaced yours? At what mileage?

Thanks in advance......

Megatron-UK

I would expect a flywheel to last the lifetime of the car. Unless it was seriously abused, overheated and/or cracked.

IanR

Depends on the flywheel. A solid (as opposed to dual mass) f/w should last the life of the car. The earlier 964 Freudenberg DMF seems to have a limited life - mine was replaced at 50K miles with the Luk DMF. I've since replaced this with the RS f/w, only because I wanted to rather than due to failure.

J.PELLEGRINO

Their is a useful service life of the one piece flywheel as well as the dual mass. The LWF should be replaced if:
Thickness falls below minimum spec.
Cracks appear in the substrate and cannot be machined out without going under min. thickness spec
The flywheel is not flat to factory spec and can't be machined in without going under minimum thickness
The bolt heads have "machine worked" the mounting flange area at all

Good luck, Jerry

Marc Shaw

A related question:

The po of my car replaced the DMF with a Luk a few years back -- is the Luk solid and how long should it last? What does a standard Luk weigh?

Thanks.

Rocket Rob

Marc - The LUK flywheel is a two-part (aka dual-mass) assembly. I don't have the weight of it.

etom - I have had my LUK flywheel for over 10 years. It was changed after my original flywheel failed. That was around 60K miles. I can safely say that the LUK's will last a long time (160K miles or more). Note: These miles are normal street and highway driving. No track/DE driving.

ddubois

Is it possible to inspect whether you have a Freudenberg or LUK DMF? I read somewhere that the LUK ring gear is welded to the primary flywheel and the Freudenberg was bolted. When I look through my flywheel sensor hole I can see that the ring gear is welded, so I'm hoping my 91 had it replaced early on.

TR6

I seem to recall its about 32 lbs. I actually have my old one sitting somewhere in my garage (I upgraded to the RS LWF).

etom

Mine was a dual-mass, and it lasted 60k miles with average driving. My mechanic says that is about right. The air sensors he also says, if still original after 60k miles, should be changed--he says it might be the best thing to do in order to remind yourself how the car should perform.