oil pressure

[Cool It]

hello -i have a 1989 29 ft formula pc -twin 350 merc I/O's- the oil pressur is perfect at 40 on the starboard engine but the oil pressur was at 55-60 on port side - will check oil tomorrow when cold but just thought I would check in and ask if pressure is high does that usually mean oil is low or too much oil?

Thanks
Cool It

 

[Bondo]

Re: oil pressure

ask if pressure is high does that usually mean oil is low or too much oil?

Ayuh,.... Oil pressure has Nothin' to do with oil Level....

Oil pressure is gnerally about the motor's Health...

 

[Aloysius]

Re: oil pressure

Listen to bondo on this.

BTW, all oil pumps have an integral pressure relief valve..some pumps will NEVEr go over 40 #'s. The rule of thumb..10#'s per thousand rpms.

 

[HT32BSX115]

Re: oil pressure

Ayuh,.... Oil pressure has Nothin' to do with oil Level....

Oil pressure is gnerally about the motor's Health...

Yes.....and is also dependent on how accurate the gage is.....(they're generally not very accurate)

 

[Cool It]

Re: oil pressure

Thanks for info-checked oil anyway and its low -need to fill here is the stupid question each engine has two fill caps one on each valve cover does it matter which one i fill from and why would there be two per engine?

Thanks
Cool It

 

[Bondo]

Re: oil pressure

Ayuh,... I guess Merc got a deal on righthanded valve covers that year,.....
They both go to the same place, use the easiest 1 to get to....

 

[TheKatsass]

Re: oil pressure

Thicker oils will increase oil pressure. Low oil will increase pressure. Cold oil will also give high oil pressure . Its when oil pressure is low its bad meaning worn bearings, crank, too much clearance in oil pump(worn out), etc. Too much pressure will blow seals and itll leak a bit. Normal pressure for any engine varies from 30 to 80 psi.

 

[coheej]

Re: oil pressure

Too much pressure will blow seals and itll leak a bit. QUOTE]

The seals don't see the oil pressure.

 

[Aloysius]

Re: oil pressure

Too much oil pressure uses power and wears the distributor drive, especially on roller lifter cams.

15#'s of oil pressure will support a column of oil 32 feet high. Think that's enough to get to the valve train in the valve cover??