frickstyle

^^^Good point(s), going to have the chain examined at a lab to see if it was faulty material, or...?

Quinlan

I am doing 2 rebuilds right now because the rollers on about 4 inches of chain all came off and were spread through out the valley and pan. A few even made it up into the valve covers. How the He!!???
Luckily we caught it when installing new blowers or we could have had a real Booom situation. Suks AZz but we are in reassembly mode now, so hopefully splash by Labor day

MILD THUNDER

What kind of chains are you guys running that are having these failures ?

Frick, was it a billet set ? What broke on it?

I would think a new engine with 10 hours that suffered a failed timing chain , is likely due to builder error. Alignment issue, oiling issue, engine misfiring repeatingly, etc.

frickstyle

Right, it's very weird. I'm going to take it to a lab to have it examined. the links "pulled" apart at one set of pins, links broke, no material went into the pan, just fell down and got collected in the cover. End play on the cam is good.

It was a billet set, double rollers, Comp Cams Rolland chain. Moving to a Cloyes.

I am wondering if anyone else had a problem with these chains in the last year? Might be mfg defect or they switched chain/link suppliers?

RSCHAP1

Many years ago...
I had replaced the timing chain on my Firebird.
Two days later it came apart.
Went back to parts store and counter guys tell me that when bored they would look through boxes of parts.
NOW they tell me that many many times they saw timing sets with no master link in the chain.
Of course I was furious and wondered why they would not say something or check after they learned this to help avoid failure in an engine.
But lesson learned.
So if it remains a mystery maybe a manufacturing or assembly defect, it has happened.

Sean

people confuse me with Stinson all the time... I'm much better looking...