5 Bent Cromemoly pushrods

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Dec 14, 2008 | 10:02 AM

vette#3

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From: Daphne,al

5 Bent Cromemoly pushrods

I had a bad ticking going on inside my motor, figuring that it was a lifter issue,so after pulling the heads & Replacing the Lifters i decided to pull the pushrods & Roll them across the table ,to my suprise 5 of them were bent ,a couple of them were pretty bad ,the heads i run are the 5.7 ltr stg 2 patriot head & have never been milled & The Shop manual for the C5 Shows to tq the roller rockers to 22 to 24ish ftlbs of tq, these are nonadjustable stock rockers,the Pushrods that were bent are the 4360 hardend rod 7.400 stock length,i came up with either the rockers were too tight or they were over revved 6,500 rpm is the highest this 346 has seen ,anybody have an opinon on what else may be the reason for 5 bent pushrods ,the others were fine,i appreciate any input on this ,thank you

Dec 14, 2008 | 10:09 AM

the_merv

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Is the Car a M6 or an A4?

Did you install these Pushrods?

Dec 14, 2008 | 10:13 AM

vette#3

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From: Daphne,al

Its an A4 & Ya i installed the pushrods when i took the old stock castings off & bought the new Patriot heads & These heads & Pushrods have 50,000 miles on them ,i have been through 2 cams & didnt change the pushrods the 1st cam was a 233/239 600/605 @ 50 on a 112 ,then i went to a blower set up & took the cam out & Put a blower cam in it but left the pushrods ,still have the heads & I am right now installing new pushrods & trying to get the car back up & running Btw the new cam has alot less lift ,its 224/228 571/573 on 115 Lsa