Slow oil pressure build up

Airlock ? Knackered gauge ? But I suppose then it would have to be the OP switch as well. Pump with serious bypass issues ?

Steve

switch

Not the gauge as I tested the op switch setting on an airline and it was ok Could be the pump or its strainer I suppose - odd though that the pressure is ok when up to temperature normally I'd expect it to be better cold and tail off as it warmed up.

I'll change the oil & filter as soon as I can track down a filter (Mann H 1038 X anyone ????????)

AWEM

Not if theres a leak, the pump sees the "easier" path and takes it. As the engine warms up the "easy" path becomes less attractive and oil pressurises the system. But what do I know ?

Steve

Could it simply be the wrong oil - too thick when cold to flow properly? I had horendous oil pressure problems in a Rover twin cam that I had. Turned out using the wrong oil was very bad for the engine and hydraulic tappets & head!

Most likely problem is either an air leak or a blockage on the suction side of the pump, causing slow priming. The blockage would be a partly blocked screen. A worn pump could also cause slow priming. JD

First of all as it's quick and easy, bleed the line at the back of the gauge itself and see if that makes any difference. Check that the line has not been squashed at any point. Check any hoses in the line for unobstructed bores.

You do need to determine that the engine oil pressure is, in fact, OK. If the slow build up is only affecting the gauge and switch it's more annoying than potentially nasty. Otherwise ....

Assuming that you are happy that the gauge reads OK - or use another known good gauge - put the gauge as close to the oil gallery as you can get it. No long pipes. You'll then know what you are facing - I hope that it's good news.

An oil and filter change is a good first step. Check the filter bowl for metal debris. If it's a screw-in canister, cut it open.

I think it's a common one. Ask around the factors, agricultural engineers etc.. There are lots of cross reference possibilities from FRAM (CH834PL1 ?), Wix, Purolator(are they still in business?), AC Delco etc.

There's a whole heap of different sump configurations available on these engines. From memory the largest one I've been aware of (and likely what is used in a stationary application) is around 20 litres.

The last one of these engines with a cartridge filter I worked on took the same part number as the old 2.25 petrol Landrover engine.

Hi

Hope info Helps

I had a similar problm on an ancient Mercedes Engine on a barge. It was sludge in the pipe from the engine to the gauge. Swapped it for an electrical gauge on the block, a lot easier and no chance of a pipe fracture causing loss of pressure!

David