How bent does a pushrod need to be to make noise
How bent does a pushrod need to be to make noise I had a small nitrous backfire and the car went lean on a 1/4 pass.
Ended up having 120 compression on #1 and #3 was 180. (driver side)
So I pulled off the valve covers and rockers for #1. Car already has TSP 7.4 chromoly pushrods in it. Single coil springs with blue stripe down them.
THe wear pattern is even on both intake and exhaust rocker for #1 (Hole with low compression). Pushrods have not been hitting the holes inthe head either.
I know the head has to come off, but I'm wondering what this may be. I haven't tried putting oil in the problem cylinder then doing another compression test.
Valves see to be correct height compared to others with the rockers off.
What do you guys think?
Piston Ring
Piston Skirt
Valve
Noise is "Tick - Tick - Tick - TIck "
Oil Pressure is same as usual. Car doesn't smoke. Drove it hour back from the track and the noise stayed the same.
Ended up having 120 compression on #1 and #3 was 180. (driver side)
So I pulled off the valve covers and rockers for #1. Car already has TSP 7.4 chromoly pushrods in it. Single coil springs with blue stripe down them.
THe wear pattern is even on both intake and exhaust rocker for #1 (Hole with low compression). Pushrods have not been hitting the holes inthe head either.
I know the head has to come off, but I'm wondering what this may be. I haven't tried putting oil in the problem cylinder then doing another compression test.
Valves see to be correct height compared to others with the rockers off.
What do you guys think?
Piston Ring
Piston Skirt
Valve
Noise is "Tick - Tick - Tick - TIck "
Oil Pressure is same as usual. Car doesn't smoke. Drove it hour back from the track and the noise stayed the same.
I already know the compression is low, just got to figure out the cause now. I"ll listen for air out the exhaust or intake.
Hoping its just a bent valve.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
