Intake Blew Apart!
Were you running the stock cam/timing chain? Like someone said, you could have broken the bolts holding the gear to the cam. Or broken the chain. Something could have been caught in the chain. Pull the front cover and heads. That will tell you the extent of the damage. I would almost expect some bent valves, and bent pushrods. It's neat when they look like allen wrenches.
TECH Fanatic
Joined: Jul 2002
Posts: 1,218
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From: MI
Originally Posted by MelloYellow
Andy @ A&A noted a blow off valve failure might cause something like this possibly..
The BOV takes exess pressure made from the poweradder and vents it to atmosphere when the throttle blade closes. The intake is on the other side of the throttle blade, and this blowout happened all the way at the back of the intake. If the BOV failed then I would think it would back up into the blower or blow a charge pipe off. The throttle blade would prevent any sudden increase in pressure to be transferred, when closed, if the BOV were to stop working.
That is just my logic ticking away. I may have overlooked something though, someone correct me if I'm wrong. I'm not sure what happens in the Vette's drive by wire throttle system when you bang the rev limiter.
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Originally Posted by ANIL8U
Damn....told ya it was a monster hole!!! When I reached around and felt my hand go into the intake I was like "
That's yer problem"Seeing how you're valves aren't moving I am going to jump on the "broken timing chain" bandwagon here. Hitting the rev limiter as hard as you were puts a HUGE stress on the timing chain. All that *very* rapid acceleration and decelleration of the valvetrain.
Anyway, while it's down do the motor up right and THEN put the D1 on
-Jim
Originally Posted by MelloYellow
If it's a broken timing chain, how did it break the manifold? Metal fragments coming out of the head intake port?
i thought you said the intake was gone? if so, then how did you pull it off when you got home? i dont understand the extent of the damage. but my guess would be a lean condition since you hit the rev limiter 
and a backfire popped the intake apart. but the LS6 can handle alot more boost than you are making.
and a backfire popped the intake apart. but the LS6 can handle alot more boost than you are making. 
Hi Brady, I did not see the pics on dialup last nite cuz they loaded slow. Wish you were not so mean you make me cry so much.
Anyway, I see your pics, that sux bigtime. If you broke the timing chain, you may have bent all the intake valves. Maybe loaded up the cylinders and had a backfire in the intake.
Anyway, I see your pics, that sux bigtime. If you broke the timing chain, you may have bent all the intake valves. Maybe loaded up the cylinders and had a backfire in the intake.
