Re: O T Ford oil pressure fluxes

Posted by Tom in TN on December 06, 2004 at 23:37:34 from (152.163.101.7):

In Reply to: O T Ford oil pressure fluxes posted by Van in AR on December 06, 2004 at 18:42:09:

Van,

I think that Big Fred is right on with his idea of installing a mechanical oil pressure guage at least temporarily to see whether the oil pressure is actually dropping or not.

When I was young and doing a fair bit of mechanic work, your symptoms were considered to be classic signs of worn thrust bearings on the crankshaft. The theory that my "shade tree" mechanic buddies and I had was that the crankshaft thrusted to the rear of the engine when accelerating and then settled back to the middle of the thrust bearing range when it reached a less stressful point of operation. When it was thrusted to the rear, the oil would escape around the bearings rather than being forced through the oil passages in the crankshaft, thus reducing the oil pressure.

Who knows whether our theory was right or not, but I do know that I saw excessive bearing wear in engines that exhibited this symptom.

Good luck,

Tom in TN

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