Senior Tech
Join Date: Apr 2001
Location: Castle Rock, CO, USA
Posts: 823
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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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67 Camaro with 388 with Edleborck RPM heads, Air Gap, CC 282S, Tremec TKO
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Senior Tech
jeff
Join Date: Nov 2008
Location: Hot and Humid FL
Posts: 1,121
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.
1969 X66 PROJECT:
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2002 C5 COUPE ELECTRON BLUE SOLD
1987 BUICK GRAND NATIONAL SOLD
1964 CHEVY II 406 SOLD
Senior Tech
John
Join Date: Sep 2004
Location: Stuttgart
Posts: 7,695
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.
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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Belle
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.
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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Tom
Join Date: Mar 2008
Location: the 02176
Posts: 5,985
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.
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.
'67 rs - ordered new by my Grandfather
327 L30, K-K, Deluxe int, tach & gauges, 12 bolt posi, 4 speed.
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Senior Tech
Chad
Join Date: Jan 2003
Location: Thomasville,Ga.
Posts: 4,386
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?
67 Plum Mist Met. 408 TH350 3.08 posi
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Tom
Join Date: Mar 2008
Location: the 02176
Posts: 5,985
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.
'67 rs - ordered new by my Grandfather
327 L30, K-K, Deluxe int, tach & gauges, 12 bolt posi, 4 speed.
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Tech Team
jeff
Join Date: Sep 2008
Location: Spokane, WA
Posts: 81
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.
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.
Senior Tech
Join Date: Apr 2001
Location: Castle Rock, CO, USA
Posts: 823
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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67 Camaro with 388 with Edleborck RPM heads, Air Gap, CC 282S, Tremec TKO
Join Date: Apr 2000
Posts: 21,341
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.
pdq67
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.
pdq67
Senior Tech
Ken
Join Date: Jan 2009
Location: NM
Posts: 358
Re: How can you test an oil pump?
Awesome Luke! Now you can button it up and put it back in the car.
1969 Camaro
Last edited by KMG69; Aug 4th, 09 at 04:38 PM.
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