Oil Pressure Too High?

[John Kuzman]

Finally, a decent weather day to take the BJ7 out of winter hibernation. Among other projects, did an oil/filter change over winter. Have the spin-on adapter. Used a NAPA Gold filter for the first time. (used a M*** supplied filter previously). Started engine, oil pressure reads 60+ at about 900 RPM, goes to nearly 80 under acceleration. When up to running temp., reads about 40 at idle, 60 under load. Prior to this oil change, readings were just about book spec. of 50 cold idle, 25-30 running temp idle. Oil is the same as always, 20-W50. Could the NAPA filter affect the system pressure? Anti-flowback in filter causing pressure increase? Are these readings I am seeing a reason to be concerned? Thanks.

 

[Dave Russell]

Hi John,
Yes, some filters do have more restriction than others. Since the oil pressure pickup point is downstream from the filter, less restriction in the filter would cause higher gage readings. The pressure regulator bypass spring calibration could be a bit on the high side but I wouldn't worry about it. The regulator plunger may be sticking a bit, you could try removing it & cleaning things thoroughly.

Your pressures of 40 & 60, oil hot, are exactly the same as my BN2 with 20-50 hot oil & a K&N # HP-2009 filter.
D

 

[John Kuzman]

Dave-
Thanks for the reply. I may follow your suggestion and clean the by-pass just to see if it makes any difference.
John