C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

How the heck does this happen??

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Old Jun 15, 2011 | 10:37 AM
  #1  
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
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Default How the heck does this happen??

Some folks know I lost the engine at a track event. But how the heck does this happen:






"Looks like a lifter shot out into the timing chain area and broke the chain and/or the cam sprocket. With the cam not moving and the piston still in motion, the valves are likely bent as well."

Ouch
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Old Jun 15, 2011 | 10:54 AM
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Something got in a bind and locked up.
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Old Jun 15, 2011 | 11:13 AM
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Holy crap, that's enough to make grown man cry.
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Old Jun 15, 2011 | 11:17 AM
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Did the cam seize? An oiling issue?
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Old Jun 15, 2011 | 12:03 PM
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holy crap.
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Old Jun 15, 2011 | 01:32 PM
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Man that's brutal. I feel your pain.

I can offer some free parts if you just want to get her running again cheaply, I have a timing chain (I think it's the same one), you can use the sprocket if your chain isn't stretched. I have lots of valvetrain goodies, springs, lifters, etc. if any of those are damaged. Sadly, no valves and that's probably what else broke. I have most of the gaskets for the front end, too.

PM me once you get your head wrapped around what you want to do.
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Old Jun 15, 2011 | 01:51 PM
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It appears you have what is left of a hyd roller lifter body behind the cam gear.....

My guess - It somehow kicked out a lifter and the lifter made it wasy down the front oil return, got wedgeded behind the upper cam timing gear and broke it.

Sorry to see it. Hopefully the damage is limited to the timing chain set, camshaft, lifters, pushrods and a few bent valves.
Will
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Old Jun 15, 2011 | 02:01 PM
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jaa1992, Check you thread on the other forum I have replied to it with the fix.
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Old Jun 15, 2011 | 02:20 PM
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Originally Posted by Paul Ruggeri
Did the cam seize? An oiling issue?
I had a timing chain look like that once; the cam came out on five pieces.
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Old Jun 15, 2011 | 03:02 PM
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Think I got a bunch of good valves and springs if it will help.
Set of 643 heads also
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Old Jun 15, 2011 | 08:31 PM
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Originally Posted by rklessdriver
It appears you have what is left of a hyd roller lifter body behind the cam gear.....

My guess - It somehow kicked out a lifter and the lifter made it wasy down the front oil return, got wedgeded behind the upper cam timing gear and broke it.

Sorry to see it. Hopefully the damage is limited to the timing chain set, camshaft, lifters, pushrods and a few bent valves.
Will
Thats exactly what it looks like. The lifter for the exhaust on #2 came apart and the body found its way into the driver front oil return and jammed against the chain braking the chain and chewing up the lower sprocket. Its going to one of the Elliot boys to be taken apart and see if what is salvageable. I've got a set of heads that were recently rebuilt that I can use, I'm just hoping there isn't terminal internal block damage.
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