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KALAMYKID
KALAMYKID, Shop Owner/ Tech
Category: Mazda
Satisfied Customers: 4173
Experience:  I HAVE OWNED MY OWN SHOP FOR OVER THREE YEARS. I HAVE THE TOOLS AND SOFTWARE TO ANSWERE ALMOST ANY QUESTION CORRECTLY
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Just rebuil the engine, replaced,water pump,oil pump and

Customer Question

Just rebuil the engine, replaced,water pump,oil pump and everything else replaceable original Mazda, and the oil pressure will not raise over 20 at 2000rpm and drop to 5 at 800rpms, I did everything you can think off even took the engine back to the machine shop again,put everything back, and still the same, don't know what else to do. Please heeeelllllppppp.
Submitted: 11 months ago.
Category: Mazda
Expert:  KALAMYKID replied 11 months ago.

How are you getting your oil pressure readings? Are you using a pressure gauge connected to the oil port, or are you going by the factor gauge in the dash?

Customer: replied 11 months ago.
External Pressure gage connected to the oil port.
Expert:  KALAMYKID replied 11 months ago.

How old is the gauge?

Expert:  KALAMYKID replied 11 months ago.

Did you have this problem before the rebuild?

Customer: replied 11 months ago.
The gage is new as a matter of fact I have used two new gage, and no it didn't happen before. All this happened after the replacement of the crankshaft.
Expert:  KALAMYKID replied 11 months ago.

Did you palstigauge the crank bearings when you assembled the engine?

Customer: replied 11 months ago.
I assume the machine shop did it during the assembly, I will call and ask.
Expert:  KALAMYKID replied 11 months ago.

So the machine shop assembled the engine?

Customer: replied 11 months ago.
the machine shop assembled the engine, here in PR is a very common practice.
Expert:  KALAMYKID replied 11 months ago.

If this where in my shop I would go back into the engine and double check just to make sure they did not over look anything. I would also plastigauge the cams just to make sure there is not to much clearance that could cause low oil pressure.