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Tech Question
William Slaterbeck, Langley AFB, VA, 1973 Plymouth Sebring Plus 451
This is probably a dumb question but here goes. I am installing a mechanical cam and adjustable rockers in my 451ci (400ci with 440 crank)block. I was wondering if I have to make any modifications. The one thing I notes was the new push rods are solid. The stock ones are hollow for oil to travel to the rockers. If the oil does not travel through the push rods how does it get to the rocker arms? Thanks for the help.
William-
It's not really a dumb question - if you've a Chevy guy! BB Mopars don't oil through the pushrods. There's a drilled passage in the block, which feeds a mating hole in the head. It then comes up through a rocker stand, and pressurizes the shaft, etc. Excellent system!
Obviously, when there's no rocker shaft (Chevy / Ford / 318-360 Magnum, etc.) this can't work!
Look at a Mopar lifter: No oil hole on top! (Although, since the hole does no harm, and is needed with Mopar's "Magnum" V-8s, some aftermarket lifter manufacturers have begun to standardize on including the hole in all lifters they supply.)
Rick
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