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Old 05-22-2020, 09:37 PM   #2
G.M.
Senior Member
 
Join Date: May 2010
Location: Florida and Penna.
Posts: 4,471
Default Re: Rear main oil drain pipe size

Quote:
Originally Posted by trades707 View Post
Pulled the pan on the 48 V-12 in search of source for low oil pressure. Find lots of oil on everything, but the drain pipe on the rear main is missing. Anyone have an idea of what size pipe is needed? I suppose it would be best if pipe reached into oil sump.
The engine has a Ford rear seal, slinger groves are ground off crankshaft. Engine also has a PCV valve on top catching vapors under intake and routing to carb base.
Thanks
I think it is 1/8" pipe. There is a load of oil that comes down out of
the top of a V-12. I turned one over with 12 volts to the starter with
the spark plugs out and the pan off. I had a can of oil feeding into
the top end. They also have a problem of loosing oil pressure at the
relief valves up in the front of the valve valley and in the oil pump.
When it looses a little oil pressure the lifters start singing a tune. G.M.
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