Z-134 oil pressure

Bart CA

Member
What is the normal oil pressure for Z-134 Engine ?
looking for a MF-50..oil pressure is 25 cold
and 15 hot with 10W30 oil.


Thanks in advance

Bart
 
Well my manual says 20 so it's not bad but not good New bottom end bearing will cure that a in frame fix just my opinion
 
bart,
I run shell rotella 15w40 diesel oil in my old TO-35 with z134 engine.

this oil maintains better oil pressure and also has the zinc additive that oil had in it back it the day.

you can also run a qt lucas oil stablilzer in the oil, this will also help increase the oil pressure in a tired old engine. It's good stuff.

I just run the shell rotella because of the zinc additive.
 
Thw Z series Continentals has sorry oil pumps that wear out, and occasionally the relief valve sticks open. I believe the manuals say >15 psi on an engine at operating temperatures and idling(~400 rpm)is the minimum. Normal pressure is 25-30 psi.
If it isn"t a stuck relief valve or worn pump, you"re looking at replacing the main and rod bearings
 

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