How can you test an oil pump? - Team Camaro Tech
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post #1 of 11 (permalink) Old Aug 4th, 09, 07:41 AM Thread Starter
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Question How can you test an oil pump?

Before I pulled my motor I had zero oil pressure. The oil pump is Milidon and has 150 miles on it. I suspect the oil sending unit and not the pump. I have the motor out of the car and the oil pan off. Would like to make sure before I put it all back together.


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post #2 of 11 (permalink) Old Aug 4th, 09, 08:28 AM
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Re: How can you test an oil pump?

I'm not to sure. Guess you could put the pan back on, fill it with oil, pull the distributer. Then test it with a drill. That's how I prime my engines before start up. Should work the same.

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post #3 of 11 (permalink) Old Aug 4th, 09, 09:13 AM
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Re: How can you test an oil pump?

Luuuuke,
Go borrow an engine oil primer from autozone or kragen. Do what jeff said, if you have a gauge you should see it react from the test. Or pull valve cover off and watch for oil come up into top of heads.
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post #4 of 11 (permalink) Old Aug 4th, 09, 09:41 AM
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Re: How can you test an oil pump?

Place oil pan or drain pan underneath the chucked oil pump to drill motor.
Submerge the pick-up in the oil.
Turn on drill motor for a split second to confirm correct rotation; reverse drill motor direction if needed.
Extend arms and squeeze trigger - watch oil fly to the ceiling, if in the garage/living room/kitchen ---- no oil, bad pump or drill motor in wrong direction still.
Place a plate over the pump outlet, C-clamp would be good.
Squeeze trigger and see if relief valve works - oil will coming out the side of gear cover.

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post #5 of 11 (permalink) Old Aug 4th, 09, 10:15 AM
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Re: How can you test an oil pump?

Quote:
Originally Posted by Everett#2390 View Post
Place oil pan or drain pan underneath the chucked oil pump to drill motor.
Submerge the pick-up in the oil.
Turn on drill motor for a split second to confirm correct rotation; reverse drill motor direction if needed.
Extend arms and squeeze trigger - watch oil fly to the ceiling, if in the garage/living room/kitchen ---- no oil, bad pump or drill motor in wrong direction still.
Place a plate over the pump outlet, C-clamp would be good.
Squeeze trigger and see if relief valve works - oil will coming out the side of gear cover.
LOL and don't forget your safety goggles. Swim mask and snorkel would work well!!!

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post #6 of 11 (permalink) Old Aug 4th, 09, 11:19 AM
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Re: How can you test an oil pump?

If you are not sure buy a new pump.What $60.00?Price of a rebuild or blown engine?

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post #7 of 11 (permalink) Old Aug 4th, 09, 12:18 PM
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Re: How can you test an oil pump?

Was the engine running? Did it sound OK? I don't think it would run long or well with 0 lbs of pressure. Probably the sender or gauge.

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post #8 of 11 (permalink) Old Aug 4th, 09, 01:41 PM
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Re: How can you test an oil pump?

A little late but speaking as a 25yr journeyman mechanic the first thing you should have done is install a cheapo mechanical gauge to determine if the sender was bad or not. At this point I would remove the electrical sender and try to find a buddy to install it on his car and see what it reads. If your oil pressure really went to zero you more than likely need more than a new pump at this point
Anyone know how deep their crank is tapped for the balancer bolt? (differant thread but I'm still waiting for an answer)

Good luck Lukeskywalker.
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post #9 of 11 (permalink) Old Aug 4th, 09, 02:22 PM Thread Starter
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Re: How can you test an oil pump?

Ok it works really really good. I put the pump in a can of oil and used a primer rod and drill. It shot oil all over the place out of the oil filter location.


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post #10 of 11 (permalink) Old Aug 4th, 09, 03:03 PM
 
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Re: How can you test an oil pump?

I want to say at least 2-1/4" to maybe 2-1/2".

Heck, might even be 3"??

Take a 7/16" x UNF bottom tap and tap away for a SB.

1/2" x UNF for a BB.

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post #11 of 11 (permalink) Old Aug 4th, 09, 03:08 PM
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Re: How can you test an oil pump?

Awesome Luke! Now you can button it up and put it back in the car.

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Last edited by KMG69; Aug 4th, 09 at 04:38 PM.
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