"Idiot light" vs. Oil Pressure Gauge

chryslercruiser said

Isn't that called the "oil pressure relief valve" and controls the oil pressure from going sky high on a cold start with thick oil, for when people start the engine at -30, drop it in gear and try to merge onto the fast lane because they are late for work..

What do you call the spring loaded valve that is IN the oil filter for when the filter gets plugged?

Click to expand...

They do the same thing. One dumps oil back into the pan (valve in the oil pump) the other dumps oil straight into the engine bypassing the filter. They are both bypass valves. That said, I've not seen a bypass valve in an oil filter in years, but of course I might not be paying attention, either. LOL All I am aware of now are the anti drain back valves. .......and they really aren't worth two cents.