Show whole topic Feb 14, 2008 3:16 pm
H 54 John Offline
Member
Registered since: Dec 09, 2007
Location: East Sussex, UK


Subject: Oil pressure fluctuating...
Having got my engine running quite nicely, I find that the oil pressure at startup usually goes straight to maximum. After a few minutes, as the oil thins, it falls back - maybe to 60 psi or so. Then it may suddenly drop to the correct, limited value of approx 30 psi from which it occasionally flicks up again to a very high value which may be maintained briefly or for some time.

It's not the gauge - I substituted another.

To me, it has to be the relief valve sticking for some reason. But I've taken the plunger out and it doesn't seem damaged or excessively worn. Has anyone else seen this? And if it is the valve, does anyone re-condition oil pumps?

Thanks,

John