HMJ: My search for the cause of low oil pressure ended up at the top of my
engine. I removed the valve cover to see if I was getting excess oil at the
rockers. What I discovered was that the washer under the banjo fitting at
the oil tube from the head to the rocker arm was split and passing a large
flow of oil. I replaced the washer and gained oil pressure. I am currently
getting about about 60 psi cold, 45 psi at 180 degrees engine temp cruising
at 70 mph on the Interstate (oops! I mean 65 mph, officer ;-) ).
(The Other) Len
Fairfield, CA, USA
1967 AH 3000 MkIII, HBJ8L39031
----- Original Message -----
From: <healeymanjim@hansencc.net>
To: <healeys@autox.team.net>
Sent: Thursday, September 11, 2014 7:18 PM
Subject: [Healeys] oil pressure problem
>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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