Broken push rod

[Joske2]

Look what i found in my engine, luckily it broke on start up.

 

[steve340]

I suppose you noticed it is going blue. Have you got an oil supply problem?

 

[beanhead]

Bummer....what type of cam/spring/rocker/valvetrain setup are you running? Looks like two-piece pushrods?

 

[Lefty71]

Looks like two-piece pushrods?

Aren't those the cut-to-fit kit ones??

 

[beanhead]

Aren't those the cut-to-fit kit ones??

Looks like it to me, with the black cup..

 

[Joske2]

Yes, they are cut to fit. Comp Cams solid roller in 272 @ 50 ex 276 @50 .621 lift in and exhaust. It has the Indy S/R roller rockers. 1.5 ratio.
K-Motion K1100 springs.
All other pushrods where good. Adjusting screw ball was a bit damaged, but not blue from heat or so. Maybe the cup was damaged from pressing
it in?

 

[steve340]

Sorry damaged during assembly is possible but it would be a long shot. Hard to imagine an assembly problem making the pushrod go blue. That is heat that causes that. If all the others are OK I would be definitely checking that rocker for an oiling problem.

 

[Dennis H]

Had an identical break. Blamed it on bumping up the rev limiter to 6k from a lifetime of 4850. This on a 50k plus motor. Replaced it and all is well. Got a nice set from Manton, but have not installed them. Rods seem to be the first place to fail/weakest point on my build. At leat it’s high and easly accessed.

 

[Dennis H]

I never found the broken piece. Not in pan.

 

[beanhead]

View attachment 769796 I never found the broken piece. Not in pan.