Jumped Chain How Bad?

[nynor]

bad.

[idontknow]

Ok I give, how bad is it?

[nynor]

very.

[bholmes]

As in jumped timing belt? Did it jump or break, neither is good, breaking is worse. with a jumped belt you can fool yourself into thinking you can replace the belt and you'll be ok....that is until you do and it still turns out you bent the valves. either how, i'd probobly pull the head and inspect the valves and pistons, even if you jumped time, it's possible to damage the valves and pistons. Usually the pistons survive, but better safe than sorry. So that's where i would start. Or you can just be lazy and put a new belt on and then pull the head when/if it doesn't run. best of luck and keep us posted!

[hpservertech]

What exactly is the question?

[bearone2]

jumped what chain?

[Marcone]

I was told that the turbo can break a belt and not suffer much damage due to the low compression..

am i very off?

[Razorback1980]

Sorry to hear that nynor.

[nynor]

Originally Posted by Razorback1980

Sorry to hear that nynor.

notice that it wasn't me that started the thread. somehow, the original poster was able to start a thread with a title but then didn't have any text. my turbo is fine, as far as i know. i injured my shoulder, so i haven't started it in a few days.

[Techno Duck]

Originally Posted by Marcone

I was told that the turbo can break a belt and not suffer much damage due to the low compression..

am i very off?

The 951 still has an interference motor and the valves will still make contact with the pistons. You may not bend as many valves, but your still bending them.

[Porsche-O-Phile]

Compression has nothing to do with it. If the belt breaks, Mr. Valve gets friendly with Mr. Piston and bad things happen.

Expect (in addition to the time & labor to replace the belt) to replace 8 (or 16) valves, possibly one or more of the pistons, possibly having the block re-honed if anything physically breaks off and rattles around in the cylinder (usually not, but possible). Also possible damage to valve seats. It can get fairly ugly fairly quickly.

[idontknow]

951s had sodium filled valves, correct?

If they were, I'd bet they'd be more prone to shearing off rather than just bending like your regular valves would. Bent valves = bad, broken valves = worse.

[Porsche-O-Phile]

Yes. The exhaust ones anyway.

[Razorback1980]

Oops sorry Nynor.....

[nynor]

no worries, its an odd post.