Mazda Rotary Club

General => General Technical => Topic started by: connor66 on August 13, 2005, 11:28:47 AM

Title: Oil pressure
Post by: connor66 on August 13, 2005, 11:28:47 AM
Guys

My stock oil pressure gauge recently fell to zero and registers no movement at all under any conditions (at idle, WOT or anything in between).

Oil level is stable and there are no leaks.

I know the pressure sending unit is prone to failure and I’m trying to determine if that is the problem.

I’ve verified the stock pressure gauge is ok (grounded the electrical connector, turned on the ignition and the gauge moved to maximum).

I’ve just tried a crude test to determine if oil pressure is present in the engine.

I removed the oil filter and started the engine expecting that oil would squirt out under high pressure (60 psi or so).

It didn’t. The was plenty volume of oil coming through the inlet hole where the filter sits, but it wasn’t what I would call under pressure.

I put my finger over the hole and felt no resistance at all, certainly not what you’d feel if you stuck your finger over a garden hose for example.

Has anyone else tried this crude test and if so, what did you see?

Many thanks