You are right Micheal. The relief valve in the block (front of the valve gallery, ford group 6666) should regulate the oil pressure to about 30 psi or so. I can't seem to find the answer right away as to whether the oil relief valve comes into play after the oil exits the engine through the cooler/filter and then back into the engine, or if it regulates it before the oil leaves the block. If it is after, then the problem could still be with a filtration/cooler blockage. Does anyone have a good illustration of the path of flow on a Flathead lubrication system?
Adjustment or repair of the relief requires the removal of the intake manifold.
Last edited by rob love; 05-08-12 at 21:39.
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