oil pressure

[pyrro]

what is the normal oil pressure in a 90 z32 n/a mine is like 20 or maybe less... is this bad...

[evildky]

warm idle standard is like 15 psi, it should go up as the engine revs go up, and it should be higher when you first start the car

[pyrro]

so its not my oil pump, i changed the oil of my car to a 20w-50 but the knocinkg still goes on...
what could this be...

[evildky]

if you read my post on your thread about the toickign you'll see I suggested it might be an exhaust leak at the head and nowhere did I suggest you change you oil, and at this point I suggest you change back to standard oil, the 20w50 is too thick for startup and that could lead to cold start oil starvation

[pyrro]

ok so what head gaskets do you suggest i saw some in ebay does it matter if they are for the twinturbo.. its the whole set...

[evildky]

I never said headgasket, I said exhaust at the head, and that doesn't mean it's that exhaust for sure but if you use a piece of tubing to your ear and move it around you might be able to determine that location and evaluate if it's annoying enough to warrent the effort involved