Low oil pressure

FU64RY · Dec 17, 2016

Rebuilt 225 / Has very low oil pressure. Runs fine and plenty of power.
Factory gauge on the interment cluster goes up to 80 psi. Barely gets off of the low line.
It's a A100 van.
All new parts including oil pump.
Any suggestions.

dryheat · Dec 17, 2016

Try a new external gauge to validate that the oil pressure is actually low first.

Cranky · Dec 17, 2016

Do you have a new sending unit on the engine? I've always installed mechanical oil gauges on my stuff....it doesn't lie.

FU64RY · Dec 17, 2016

Cranky said:
Do you have a new sending unit on the engine? I've always installed mechanical oil gauges on my stuff....it doesn't lie.

It's mechanical. No sending unit.

Cranky · Dec 17, 2016

FU64RY said:
It's mechanical. No sending unit.

You might swap out the pressure relief spring in the pump and see if that changes things. New pump, right? Do you still have the old one? If so, see if they both have the same tension....

steve from staten island · Dec 17, 2016

Did you check clearance on mains and rods?

dvw · Dec 17, 2016

I've had bad mechanical gauges as well. How does it sound? OK? Try another gauge. How long has it been rebuilt? Recently? Internal plug missing?
Doug

WP29440SE · Dec 17, 2016

Should have tossed it in a ditch and dropped a 360 in there

BeeKool · Dec 18, 2016

WP29440SE said:
Should have tossed it in a ditch and dropped a 360 in there

225s are reliable and smooth running.If I were to swap motors, I would put a 318 in it before I would a 360. Just my preference.

mopar 3 B · Dec 18, 2016

Any left over parts laying around? Oil present in the coolant or coolant in the oil? New parts are not a guarantee everything is ok.

WP29440SE · Dec 18, 2016

BeeKool said:
225s are reliable and smooth running.If I were to swap motors, I would put a 318 in it before I would a 360. Just my preference.

I swapped a 225 for a 318 in my duster, and to my surprise, not only was it more reliable but I got better gas mileage with plenty of power. Just a thought.....

moparedtn · Dec 19, 2016

Another vote for trying another gauge temporarily to verify the stock one is telling the truth. No sense in worrying about a problem that might not actually exist.
Been there, done that just recently.

moper · Dec 20, 2016

I apologize but I'm confused. The factory gage reads 80psi, ir it reads very low? What does the mechanical gage read at idle (hot)? What does it read at 3Krpm?

FU64RY · Dec 20, 2016

Gauge goes to 80psi.
it reads low at idle and high rpm's

moper · Dec 20, 2016

Ok.

FU64RY said:
Gauge goes to 80psi.
it reads low at idle and high rpm's

What are the pressures it's indicating?

FU64RY · Dec 21, 2016

moper said:
Ok.

What are the pressures it's indicating?

about 15.

miller · Dec 21, 2016

Like Cranky says...probably need to look at the oil pump pressure relief spring. Sounds like it's not seating.

moper · Dec 21, 2016

FU64RY said:
about 15.

OK - so it's 15 at hot idle? Or at 3K? Does it rise with rpm, or stay at around 15? Any additional data will help. What it does, and when it does it...

FU64RY · Dec 21, 2016

Okay! then.
I'm going to take it out today, it's going to be in the 40's.
I'll have time this weekend to do some of the testing you guy's have suggested.
Thank You
Steve

Low oil pressure

FU64RY

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dryheat

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Cranky

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FU64RY

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Cranky

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steve from staten island

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WP29440SE

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moparedtn

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moper

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