Cold Oil Cooler

[RUYSENAARS]

I have a 1983 300d Turbo, and have a weird proble. I have posted on this forum before about it. When the engine is at normal operateing temp. and at idle the oil pressure is almost zero. When I take off from a stop the pressure immediatly goes up(up to 3bar). Long story short, replaced oil pump, rod/main bearings, (old ones did not appear worn!), but while I was there..... STILL no change. The car now has 190k and 20w-50 synthetic. I have put 30w in it, no change either. Really racking my brain!!! I have noticed that the oil cooler is cold, even after a long drive, by the way I live near houston, TX it gets HOT down here!! So I thought oil thermostat was bad, thought about replaceing, but thought again, and just took it out all together. STILL no change. ARRRRRRRRRGGGGGGGG!!!@!# ANY IDEAS!!!!!!
p.s. engine doesn't seem to burn too much oil, about a quart every 2k or so.

Have you checked the pressure with a gauge other than the one in the instrument cluster? It's a good idea to verify that the stock gauge is accurate.

[RUYSENAARS]

OPPS! Sorry hit wrong button,
I did check it, but I don't think i got a good seal, as it leaked oil!
I can try again. But the pressure was about the same as the gauge said.

[Hatterasguy]

Try replaceing the two little "O" rings on the shaft the goes inside the oil filter. Make sure it is a German filter and sealing tight; get rid of the 30w oil, it does not belong in a 617 in a warm climate. Try some 15w-40 diesel oil. My oil cooler return line was always real cold, even when it was 85 degrees out.

[leathermang]

In the summer in Houston you can use straight 40 wt.... Dello 400 ....