Rigent,
I do not know the oil temperature related to your observations, but even
at 75 F my 260 registers 50 psi at idle. Unless it is very hot, it
rarely drops below 35 psi. This is with 30,000 miles on the engine. I
do not know if your rebuild included bearing surface wear and roundness
for select fit of standard under sizes. The days of machining bearing
inserts for proper fit are long gone, and only thin wall bearing
surfaces are sold. The proper size being purchased, rather than
machined, after any necessary crank grinding to the next standard size
is done.
Of course a "plasti-gage" check is usually done to re-sized rod
bearing/main bearing clearances for final fit check.
Your mechanical 30 something year old gauge may be out of calibration,
or offset about 10 psi. I would be much more concerned about the oil
leaks, not a 65 psi hot oil pressure.
Clogged lines, or obstructed oil passages, could - of course - be a
contributor to abnormal pressure.
Get a "T" fitting and an accurate calibration gauge to check the
pressure, and fix the leak.
Steve
Rigent Gagnon wrote:
>Hi all,
>
>A few months ago, I had the crankshaft and bearings replaced on my 289
>because the shaft was scored at the back end and I had a major oil leak
>because the seal could not do its job. The bearings had been previously
>replaced when I had the engine rebuilt after 25 years of inaction. I
>had the oil and filter replaced. Now the cold oil pressure at idle is
>75 lbs, hot is about 65, but if I bring the revs to 5k, the gage shows
>80 lbs. Unfortunately, oil also squirts out of filter line connections.
>
>Any suggestions as to what would cause abnormally high pressure? I have
>the stock remote filter set up and what I believe to be the original
>oil pump.
>
>Thanks in advance.
>Regent Gagnon
>B382100371 (Orchid Green)
>Ottawa, Canada
>
>
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Steve Laifman
Editor
http://www.TigersUnited.com
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