What happened cam and lifters?!?! boosted
#33
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From: Manhattan. Ks
thats where i would go, but i go up there enough i could get it up there easy plus i have an obs truck too so wouldn't need help there. But i do appreciate the help ill probably end up calling tomorrow and see what they say. if not i think im gonna replace cam bearings and rock the block.
#34
I am joining the group that thinks that lifter pre-load, or something else like a bad cam, started the problem. If it was one lifter, it would be easy to say that you got a faulty one. You never hear of this happening with the wrong lifter pre-load, you just hear of complaints of noise. A bad heat treat on the cam is starting to sound more likely the more that I type. That is exactly what happened. The cam flaked, ruined five lifters, one so bad that the wheel came out and got stuck between the block and cam. This stopped the cam, and the momentum of the crank ripped the cam bolts out. I don't think that loose cam bolts would let the sprocket rattle back and forth long enough to cause this kind of damage. The bolt holes don't show prolonged damage, either. Just instant damage.
There, problem solved.
Crime Scene Investigator Mike at your service.
There, problem solved.
Crime Scene Investigator Mike at your service.
#35
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From: Manhattan. Ks
does sounds very plausible, i would agree with you there about the lifter breaking and causing it to snap the bolts, makes sense sense due to it being pushed down and causing to break even further as it did. do you work for CSI?
#39
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From: Manhattan. Ks
so now that it's all torn down the only damage in anywhere else i see is that gouge and it doesn't seem like it would effect anything and is very minor. so i think im still gonna run this block, just change the cam bearing in the front the others looks literally brand new. now im still planning on running a new cam the same size (tu0) and some ls7 lifters. does anyone have any thing else they'd recommend on this? replacing cam gear, cam bolts, oil pump, and timing cover also.