Bent Con Rod!! Why

**68CamaroLS1** · 07-07-2009, 11:07 PM

I tore my 98 LS1 down tonight and found that the #6 rod was bent. I was thinking it was caused by a faulty injector causing a lean condition and detonating that cylinder. I spoke to my friends father who is a mechanic and he says its probably due to over revving. For one I believe the ECM shuts fuel off at 6200rpm and secondly it was in an automatic. So I kind of doubt its due to over revving. Does anyone have any idea why a con rod would get bent? I did take off the heads and there was no head gasket leak, so hydrolock is not the answer.
Thanks all.

**JoshieDoom** · 07-08-2009, 01:52 AM

Does the vehicle ever get wet? A leaky o-ring from the injector will allow water past it and allow the car to hydrolock the car.

**mrr23** · 07-08-2009, 03:50 AM

something had to have gotten in that's non compressable like water.

**Spaz** · 07-08-2009, 04:42 AM

collapsed lifter possibly...

**68CamaroLS1** · 07-08-2009, 10:23 AM

I'm not sure if it had a leaky oring. I pulled the engine from a friends car because it was making a knocking sound. The cylinder is clean. There is no sign of moisture or surface rust in the cylinder. I'll check the lifters.

**cammed goat** · 07-08-2009, 10:27 AM

Water will evaporate in the chamber, basically "steam cleaning" the cylinder walls.

**Dr.Crash** · 07-08-2009, 10:31 AM

Originally Posted by JoshieDoom

Does the vehicle ever get wet? A leaky o-ring from the injector will allow water past it and allow the car to hydrolock the car.

this happend to me. very possible

**mrr23** · 07-08-2009, 10:37 AM

a collapsed lifter will not bend a connecting rod. now, if the OP is refering to the pushrod being bent, that's a different matter.

**Hi-Po** · 07-08-2009, 12:37 PM

Originally Posted by mrr23

a collapsed lifter will not bend a connecting rod. now, if the OP is refering to the pushrod being bent, that's a different matter.

:agree: Two differnt things.

If you bent a CONNECTING rod, something got in there that does not compress.

**68CamaroLS1** · 07-08-2009, 02:51 PM

wouldn't detonation cause a bent rod? Two opposing forces.

**mrr23** · 07-08-2009, 06:23 PM

it would have to be a huge amount. and i mean a huge amount. the head gasket would go first. i know as i've done it. after racing and popping the head gasket, i drove my car home and cracked the exhaust port. no bent rod