Randy
Oil pressure is directly related to all engine bearing clearances,
oil pump rotor and internal clearances, and the pressure relief valve. You
have to look for cracks in the pump housing, clear the pickup screen and
tube and check that the seal between the pickup tube and pump housing is
good. Also the pick up screen has to have some clearance to the bottom of
the oil pan so it can draw oil.
My 260 has 55 psi cold and drops to about 45 psi hot. I rebuilt this engine
in 1983.
I believe one rule of thumb is you need 3 to 5 psi per 1000 rpm. I would
want to see around 40 psi constantly.
Ron Fraser
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net] On
Behalf Of Randal J. Zimmermann
Sent: Sunday, August 14, 2005 4:48 PM
To: tigers@autox.team.net
Subject: Oil Pressure
I'm trying to get my Tiger on the road before summer's end after a lengthly
restoration. I recently started the rebuilt 260 and while it ran somewhat
well, I didn't want to keep it running because I was only getting about 15
lbs pressure to show on the oil gauge.
I've checked the gauge lines to be sure the connections are tight and I've
inspected the engine for possible oil leaks but all seem to be tight. I've
checked and rechecked to be sure the distributor cam is engaged with the oil
pump and all seems to be as it should. I expect that if the oil pump wasn't
working I wouldn't see any pressure at all. I've put in Mobil One but I
doubt that would effect the pressure.
Any suggestions as to other sources of the problem? Am I being too
paranoid? Thanks.
Randy Z.
St. Paul, MN
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