[Healeys] oil pressure problem

[Oudesluys]

Did you check the journals (big ends and mains) on ovality? Did you use
plasti-gauge on all journals at several positions?
Kees Oudesluijs
NL


healeymanjim at hansencc.net schreef op 12-9-2014 4:18:
> a while back i had mentioned a newly rebuilt bt7 engine that had very low
oil pressure.  after doing all the obvious external investigations to no
avail, we dropped the pan and tried to plastigage the rods.  here is where we
discovered the problem.  the plastigage would not even flatten out.  i checked
all big ends and they were all loose as a goose.  pulled all rod caps and
discovered that even though crank stated it was .020 reground and mains were
.020 undersize, all six rods had .010 bearings.  new bearings were installed
and now  at operating temp the oil pressure is over 30 psi at about 1000 rpm.
all is well, right?  wrong.  we cannot figure out why even at high rpm we
cannot get over 50psi pressure on a cold engine using two different guages.
we even put some washers behind a brand new relief valve and spring with no
success.  the owner is going to live with it, but sure would be nice to know
what is happening.  could it be a gallery leak we could not find or something
i hav
>   e never heard of.  would really like to know.
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