Paulyy

So recently I've noticed my oil pressure is 0 when start up and with in a few seconds it'll build up pressure to 5 bar.
It has been doing this recently and not sure if it's actually normal or not, which i don't think it is.

Any knowledge is welcome, Thanks.

931guru

Not normal. Check the torque on your crankshaft bolt (155 lb ft) and that the pulleys are properly seated.

Tom M'Guinn

Cheap oil filter without check valve?

Paulyy

I'll check that. I have had issues there before, but i have a new pulley, bolt ect. If it was not tight, i would suspect it not to get oil pressure? i get full pressure after 1-2 seconds

I run OEM oil filter. i didn't know oil filters have a check valve? Maybe faulty? if my crank pulley is good (i would believe it is, but will check) i'll change the oil filter.

931guru

That is exactly what happens with a loose bolt. It slips for a few seconds, then builds up enough friction to turn the oil pump gear, although there is still slippage and the oil pressure can be less than max.

Northern_aqs

If my car has been parked for a while(days or longer), it does the same thing, but once pressure builds it performs as normal. I suspect this is a form of oil draining out of the pump as the engine has 31k miles from new and I use OEM filters only. The bolt should not back out over time, correct?

Paulyy

Bump Issue still there.

Changed oil filter (OEM), oil (20w50), check crank bolt. Problem is still there.
The oil pressure is delayed on start up. Revving the car up a little does not help. When pressure is built up (1-2 seconds after start up) it's at 5bar and strong, no issues what so ever.
From memory, i had full pressure from cranking then starts with full oil pressure.

Any constructive input welcome.

Humboldtgrin

Thom

This is quite common if the engine has sat for a long period.

Paulyy

a week? a day?
I can't recall it ever being this bad. I use to have full pressure as soon as it started after cranking

Thom

I would say a week or two. The pressure should jump right away to the maximum if the engine ran the previous day though.

Paulyy

I'll see what it's like tomorrow.

gruhsy

Sticky needle on your gauge cluster maybe.

My stock temp gauge sticks and I smack the cluster and the needle will go back to where is should be. I have aftermarket gauges in addition to the stock for oil temp so I know my car is not overheating when the temp gauge does funny things.

Paulyy

Low oil pressure light comes on also. I know 100% that it's low oil pressure and not an electrical fault as when i revved it once, i heard the noises your engine would make on no oil pressure.