Join Date: Sep 2009
Location: Russellville KY
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Comp Cams Magnum Roller tip Rocker failure
When I put my Eddelbrock heads on I went with Comp Cams roller tip rockers. The rating for the max pressure was the same as my Eddy's open spring pressure so I thought I'd be okay. My thought was, it is a street engine and the steel body would hold up longer than aluminum. Boy was I wrong. The motor started clattering on start-up some times and running hotter than usual. I pulled the valve covers and was going to readjust the rockers but I decided to pull one for giggles. Glad I did. The ball fulcrum was trashed and you could see where it got prettty hot. The rocker is blue/black around the ball seat on the outside and the inside is pretty chewed up. It even started to cut into a few of the rocker arm studs.
I also noticed that the springs were getting weaker too. It would rev to 6K when I first put it together but now it's floating the valves above 5500. I don't know if the heat weakened the springs? I'm going to pull the engine anyway to do my trans swap to a TKO so I will pull engine apart and inspect but I don't recommend using the Comp Cams roller tip rockers with an aggressive cam...
Now I need new springs, studs, probably seals, gaskets, etc. Wasn't planning on that!
Married to TARA so that makes me "TARA-fied"!
1967 Mustang with a 1970 429, TKO 600 & 9"
Last edited by TARA-fied; 07-17-2017 at 06:22 PM.