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Original Message
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| RE: Oil Pressure |
| By John - 09/02/2001 10:22:47 AM; IP 24.222.71.214 |
| Well.....hmmm...I hate to disagree, but first of all, I doubt the brand of oil will affect the pressure. Second, 10 psi per 1000 rpm is not right for these engines. It is OK for Chevs, but not for Fords. Any type of engine requires about the same pressure at the bearings, regardless of type. But we don't measure it there. It is measured usually just after the oil filter before the oil galleries. Fords have small restrictive oil galleries compared to a Chev. Therefore, you need more pressure at the gauge in order to have the same pressure at the bearings. Now, you should have over 40 psi at 2000 rpm with the engine hot. You don't seem to have anywhere near this. Main bearing wear is the most likely culprit, although since your engine was just rebuilt, it is unlikely you have much wear. I suspect something is leaking inside....loose pick-up, loose oil pump, loose cam retaining plate bolt (which seals off a gallery), loose or popped out oil retaining plugs, excessive wear on the rocker shafts allowing pressure loss, etc. At any rate, it doesn't sound good, and I think I would take the engine back to the guy who rebuilt it and have it torn down before major damage/wear occurs. |
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