9 replies to this topic

[germini30]

Given the mini a little blast earlier, 998cc. Its got an oil pressure gauge and always has good oil pressure but I noticed that when I got home at idle the pressure was jumping back and forth from 40-50psi. If I revved it sat at 75psi. Any reason why it was jumping back and forth at idle???

[cal844]

Because the oil is hot, it will be ok as long as the pressure doesn't drop under 20psi

When was it last serviced?

Edited by cal844, 22 March 2019 - 10:34 AM.

[germini30]

It's just I never noticed it before but this was after a good blast. I restarted it later on and all good with no fluctuations. Maybe change oil and filter. Wasn't changed to long ago but I don't do much mileage

[mini13]

has it got a ball in the relif valve as they can do this.

[germini30]

Yes it does

[cal844]

There's the issue, change for a new thimble type oil pressure relief valve

[mini13]

Yep, the balls bobble round in the oil flow.

[Spider]

http://www.theminifo...huttle-vs-ball/

[Dusky]

Sensors play up as well sometimes

[Mathilde]

I have a similar problem, when engine is cold, starting oelpressure goes up and when ideling engine warm it does not go down, or lower

always stays there with minimal movingI  changed the oelpressure gauge and the cable, still the same the gauge is a jaeger one from Italy

different reading not psi, but checked with a smith one. it goes to 7o and stayes there,  any suggestions I try to add a photo, but how. ??