Bent rod - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Samspeed · 01-25-2023, 11:20 PM

Can a tuning issue cause a bent connecting rod while hitting the rev limiter?
Car is a 2010 ss with lsa blower. 2.5” upper Btr stage 3 cam headers cat delete e60 with zl1 pump and bap. Happened on a 2nd gear hit from 3,000 rpm , tires unloaded around 5,500 rpm and it hit the limiter. Let out immediately and there was a rattle.
Checked rocker arms/ springs / push rods all looked excellent.
Pulled plugs and checked gaps. They were good.
Turned engine over by hand and it stopped
Pulled cylinder heads and all the valves look great
Head gaskets are in excellent condition as well.
The intercooler brick is double plates and in excellent condition.
Pulled the engine and discovered the number 1 connecting rod was bent causing the piston pin bosses to make contact with the crank counter weights.
Any thoughts on the matter is very appreciated!

01-25-2023, 11:20 PM	#1
Samspeed Drives: 2010 2ss Join Date: Jan 2022 Location: Arizona Posts: 11	Bent rod Can a tuning issue cause a bent connecting rod while hitting the rev limiter? Car is a 2010 ss with lsa blower. 2.5” upper Btr stage 3 cam headers cat delete e60 with zl1 pump and bap. Happened on a 2nd gear hit from 3,000 rpm , tires unloaded around 5,500 rpm and it hit the limiter. Let out immediately and there was a rattle. Checked rocker arms/ springs / push rods all looked excellent. Pulled plugs and checked gaps. They were good. Turned engine over by hand and it stopped Pulled cylinder heads and all the valves look great Head gaskets are in excellent condition as well. The intercooler brick is double plates and in excellent condition. Pulled the engine and discovered the number 1 connecting rod was bent causing the piston pin bosses to make contact with the crank counter weights. Any thoughts on the matter is very appreciated!