Posted by georgeky on May 12, 2008 at 10:22:32 from (64.12.116.73):
In Reply to: Oil pressure posted by mkirsch on May 11, 2008 at 18:10:35:
I wouldn't get to fired up about an overhaul yet. Lots of Farmalls do that very same thing. I run 5 or 6 here, and they all drop off quite a bit after running to operating temps, and orking hard. A couple of them even have brand new rebuilds on them. Gauges will also vary quite a bit sometimes. I would hook another gauge to it, and see what that shows. I ran my 1949 C for 21 years, and it never held over 5-7 PSI when working hard. Would show 45 or better cold, but went right on down with heat. I could pull the valve cover, and oil was flying everywhere, so I know it was oiling plenty.
There is a lot of deception to oil pressure gauges to start with. I hear people say mine holds 60 or 70 pounds all the time. It would blow every seal in the engine out if that was true. Had a wise old IH mechanic tell me a hundred times that if it is holding 7 pounds that is plenty. Now I know I will be flogged for this, but most the time it isn't a big deal. You should however make sure you are getting oil where it needs to go, and go from there.
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