Oil Pressure sensor 2004 Holden Monaro VZ CV8

[Mon-aro]

Havnt changed oil yet, as i dont want to go through the hassle if its not the problem….

As i mentioned earlier The knocking/ noise comes after the car completely warm and then disappears after 10-15min? Any ideas??

Current pressure reading on 5w30 Full Synthetic oil is between 2.5-3 on idle.

 

[figjam]

To me, that rattle that comes and goes, and the idle oil pressure seems a bit low to me ................ all point to something that needs fixing before it gets to the "Farrrk" stage.
Also, the oil that drips onto your cement could be a worry at annual road worthy time.
A nit picking mech could knock it back, or say that it won't pass next year, as has happened to me with a couple of my older cars which I gave away to offspring to be used as their trade-ins.

 

[Mon-aro]

Well just drained the oil and it was clean as! no discoloring nor metal shavings! gonna put a thicker oil and see how it will sound after, if nothing changes then a new oil pump time.

 

[Fu Manchu]

Poor oiling. That’s not a great noise and unless the motor is opened up, guess work and parts swapping is going to occur.

 

[Mon-aro]

ok new oil pump time i guess.

Should i get a melling high volume or standard? Any suggestions? will be ordering it over the weekend. Also any trick on how to install it without dropping the oil pan? i had a look today and the cross membrane is on the way!

 

[Fu Manchu]

I’d start a new thread on that. However remember that until someone has a look in there, you are loading the parts cannon.

Could be oil pressure loss internally in a number of places.

 

[Freddy1333]

Oil pressure showed 217kpa - was that hot or cold, idling or at revs?

I have a similar issue on my V6 and am about to make an adapter to fit a test gauge to get actually readings before l pull anything apart.

 

[lout]

Havnt changed oil yet, as i dont want to go through the hassle if its not the problem….

As i mentioned earlier The knocking/ noise comes after the car completely warm and then disappears after 10-15min? Any ideas??

Current pressure reading on 5w30 Full Synthetic oil is between 2.5-3 on idle.

holy crap, that is miles too low
should be around 25psi at idle
found this which may help you

New oil pressure drop at idle only?

So it's been pretty brutally hot in FL over the last couple months and with some new project requirements for work my '06 has been seeing a ton of stop and go, something it hasn't really seen at all since the top end of the engine was done a couple years ago. When the engine gets nice and heat...

www.ls1gto.com

 

[Freddy1333]

He's talking metric, not PSI = 25-30psi

 

[lout]

He's talking metric, not PSI = 25-30psi

thank goodness, scared me there