Oli buzzur when car is hot

What about the head? What is the actual oil pressure?

Roy

As already mentioned by ASEMaster6371... you need to check pressure
with a gauge to see what is actually going on.

Having said that, you can test the function of low & high pressure
switches with a test light.

http://www.youtube.com/watch?v=YF0BqJoTYrM

Attach the test light to battery + clamp and follow the steps in
the video.

If the light does NOT light before 2000rpm, then you have a problem
with the oil pressure switch or you are actually low on oil pressure.

Again, a mechanical gauge tapped-in where the high pressure switch
is, would confirm ACTUAL oil pressure problems.

The fact that everything is OK until the engine is WARM (oil is
thinner when warm), makes me think that you have an oil pressure
problem.... the high pressure switch should be a 1.8 bar switch, you
can try a 1.6 bar (diesel switch) to see if that helps.

Thomas