Quote:
Originally Posted by RobFrost
What weight oil were you using, and what percentage of standard spring force?
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I don't know what oil he was running but I already posted the spring rate.
The issue isn't so much the oil weight but the capacity for the rocker pad surface to trap oil.
Chill casting allows for the greatest oil retention capacity in a cast product and if the cams are chill cast (I assume they are) and the rockers are not, the rocker surface will most likely be compromised.
Now at some point the OP posted that the cams were hard welded and that is an entirely different kettle of fish. Hard welding will remover any surface porosity and the only way for the rocker to survive is to have a reliably hard surface. Relative to the cam that is.
My guess in this situation is simply poor quality rockers (we are seeing more every day) or low quality rebuilding technique.