0Brian@RPT

May not be a Corvette but, still an LS1. This one had a cam swap and after some time, this happened.









It was really too bad. The owner bought it used and is a really nice guy. He babies the GTO and now has to go through the repair process.

feeder82

thoughts on a cause?

RealmSteel

Looks like a cam that was NOT heat treated properly.

RonSSNova

What is the point of this post?

96mogt

printmanjackson

my guess is a lifter turned and that started the process

0Brian@RPT

That would be my guess as well. 3/4 of the lobes are destroyed and one one lifter failed.

0Brian@RPT

No point, just showing some pics from a 5.7L and I have not seen a cam with this must damage.

danziger

Although I feel bad for the owner, I love carnage pics. Thanks!

DaveP52462

The point is to learn..

tblu92

To me----When there is that much severe wear on ALL the lobes---It indicates a lubrication issue
--like running out of oil--plugged up oil flow--wrong viscosity---extreme overheating-
Which lifter actually broke ?? I beleive when the oil pressue goes away the 1st lifter to fail is the one that gets the oil LAST in the flow supply
It could be one lifter simply broke 1st and caused all the damage to the rest of the engine--But that would mean you were driving it for quite awhile and it would have been rattling and missing horribly---( I doubt you did that)---
Seems the logical thing is that it was a slow event that ended up finally with a broken lifter and all the other damage had alreday been in progress---

sean.b

This is just necro car **** without an explanation. I'm about to do a head/cam swap and would like to know how in the hell he managed that so that I dont do it. Looks like he forgot to install an oil pump.

nullpointer

Was the car making a lot of noise before it came in ? Wondering how you can tell if the lifter turned before all of this happened.

leadfoot4

Wasn't there a discussion or two, either here and/or on LS1tech, that says step 1 in a cam swap on an LS1 is to install new lifter trays?

drewkeen

I see needle bearings in the pan too.

sean.b

so at minimum a rocker arm went out.. was that what contributed to the rest?

SacCityCorvette

Maybe it was coil binding?

C5Natie

I had similar damage to my old motor. When a lifter collapses it causes excessive clearance between the rocker and pushrod so it becomes a hammer effect every time the pushrod hits the rocker. That will destroy a rocker really fast, especially a stock one.

3boystoys

My father-in-law had an early 80's Camaro. GM has some problems with lifters hanging in their bores. He had a cam lobe ground almost round-car still ran. He had to go to arbitration to get GM to fix what they KNEW was a problem.