Oil pressure up - Alfa Romeo Forum
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Oil pressure up

Guys, what might cause my oil pressure to go up on my 2.0 16v?

Usually it sits at 4 bar cruising along, maybe drops to 3.5 when warm, but just recently I've noticed it's showing more like 5 or 6 bar when cold and then drops to 4 or 4.5. Is this a sign of trouble perchance?
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I don't know for sure but I think the oil pressure and temp guages aren't that accurate. I though mine were all over the place when I first got my 155.

Other than that, have you changed the oil recently? blocked oil filter? Blocked crankcase breather hoses (I assume 155's have them)I'd be more worried if the pressure was going down anyway.
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Apart from the reading being higher than mine (inconsistent Alfa guages!) they sound ok.

Pressure will be higher when cold as the oil is cold too and therefore thicker, resulting in higher pressure. When it warms up its thinner and therefore slightly less oil pressure. So long as its showing pressure and doesn't change much over time you're ok


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