03-27-2009, 05:12 PM
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CC Member
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Join Date: Aug 2006
Cobra Make, Engine: A&C
Posts: 379
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Not Ranked
Broken rocker stud. wrong length pushrods?
I am a total novice. This is my first engne build. The engine ran well for about 200 miles. But something gone a miss. 
Its a 1984 windsor 351 stoked out a bit to 383 with a street/strip cam .520 lift with hydraulic lifters. The block and heads have been decked. The heads are procoms aluminium with pushrod guild plates.
I think I screw up the pushrod length. When installing the pushrods I checked them by turned the motor over to check the wear pattern . It looked good. Right in the center. The pushrods are COMP Cams High Energy Pushrods, High Energy, Steel, 5/ 16 in. Diameter, 8.234 in. Length
Today the number 7 cylinder rocker stud broke. Looking at the pushrod it was rubbing up against the head near the stud. ARE the pushrods too long? Should I have bought harden pushrods?
After looking back I see the stock length is Windsor engine; 8.182"
You can see the wear pattern on the one valve stem.
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