flywheel

[ViolentBlue]

first of all I need to say I'm not sure how the 914 clutch/pressurplate assembly goes together, the only clutch assebly IO have experience working on is my Golf, and even that's been a while

does the surface of the flywheel need machining, if it is uneven? I'm assuming that this area of the flywheel makes contact with the clutch disk.
my pressurplate has been resurfaced, but has become slightly oxidised from sitting for 8 years (the guy I bought the engine off of tore it down, had the bottom end rebuilt and bought a whole new top end eight years ago, and its been sitting since)
can I take some 320 grit sandpaper to clean it up?

[JP Noonan]

The 914 has a "stepped" flywheel. Two surfaces have to be machined, the surface the disc contacts, and the surface the PP mounts to. If not done correctly the PP will sit further away from the flywheel surface and won't exert enough pressure on the disc.

I haven't been able to locate the min specs for a flywheel, but if it is cracked, blue, or the ridges can be felt with a fingernail it needs machining (cracks and bluing can mean the flywheel is beyond hope). If it is machined too much the flywheels bolts can hit the disc, I've seen bolts filed down a small amount to get a little more clearence. Filing them too much and the bolts will stop doing there job though, which is a bad thing.

Stepped flywheels cost more to machine, but most any shop can do it. PP's can only be machined (to my knowledge) by a rebuild facility, as for the 320 grit, I like to use "Scotch-Brite" pads, they get the rust without removing as much metal. After all sanding/machining use large amounts of brake cleaner and lint free towels to clean the surfaces right before install. Even fingerprints of oil can contaminate a clutch disc.

[ViolentBlue]

thanks, I'll look into this, the flywheel dosn't look too bad, its just the surface the disc comes into contact with is a little uneven, I probably could use it this way, but id rather be on the safe side.

VB