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12-07-2020, 10:16 AM | #1 |
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Join Date: Nov 2017
Location: NJ
Posts: 61
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Verify oil pump working
What is the easiest way to verify your oil pump is working properly? I don’t have an oil pressure gauge installed.
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12-07-2020, 10:21 AM | #2 |
Senior Member
Join Date: May 2010
Location: new britain,ct 06052
Posts: 9,389
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Re: Verify oil pump working
Either momentarily remove the plug where a pressure gauge line would attach or loosen the oil return tube and run the engine. Could get messy.
WHY?? Paul in CT |
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12-07-2020, 10:37 AM | #3 |
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Join Date: Nov 2017
Location: NJ
Posts: 61
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Re: Verify oil pump working
I’m just second guessing myself. I rebuilt the oil pump and reinstalled it. And was thinking I really don’t know if the pump is working.
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12-07-2020, 10:56 AM | #4 |
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Join Date: Jun 2020
Location: Hartford area, CT
Posts: 374
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Re: Verify oil pump working
What about temperature tracking? Wouldn't the oil return tube heat up faster if it's flowing oil? Otherwise, a dry tube out in the air would stay closer to ambient.
Get a laser thermometer (under $35 most places) and hopefully you have a friend with a Model A for control. Start the control from cold and plot the temp vs time of the oil tube, along with the adjacent block temps. Then compare that to yours. As the oil warms, the pipe should warm, and the trend should be similar. Not very precise as ambient temp, airflow, oil flow and differences in how the control engine disperses heat vs yours all enter into it, but if you see a strong correlation, and verify it by comparing the tube to the oil pan temps, it might tell you what you want to know. |
12-07-2020, 11:08 AM | #5 |
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Join Date: May 2017
Location: Huntington Beach, Calif
Posts: 330
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Re: Verify oil pump working
Could have bench tested it before install.
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12-07-2020, 11:34 AM | #6 |
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Join Date: Jun 2015
Location: Red Deer, Alberta
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Re: Verify oil pump working
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12-07-2020, 11:54 AM | #7 |
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Join Date: Jun 2010
Location: Temecula, CA
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Re: Verify oil pump working
The pump is submerged in oil in the pan, if it is turning, it is pumping. If it is not turning, the bearings will soon be alarmingly noisy.
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12-07-2020, 12:06 PM | #8 | |
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Join Date: Mar 2017
Location: Connecticut Shoreline
Posts: 1,817
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Re: Verify oil pump working
Quote:
Plus remember that the Model A oil pump moves a lot of oil. You could have a mess. Good luck. |
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12-07-2020, 12:48 PM | #9 |
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Join Date: Jun 2020
Location: Hartford area, CT
Posts: 374
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Re: Verify oil pump working
Or spend under $10 for a gauge plus a few adapters at the hardware store. Mount it on the engine temporarily to do the test, replace with the plug. Here's a 0-30 psi gauge for $6.90:
https://www.supplyhouse.com/Winters-...auge-0-30-PSI? |
12-07-2020, 12:59 PM | #10 |
Senior Member
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Re: Verify oil pump working
You don’t have to run the engine. Take the plug out and have someone hit the starter for a moment with the key off. The oil should flow out a little. Not much mess at all. I’m sure you did a good job.
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12-07-2020, 05:52 PM | #11 |
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Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,907
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Re: Verify oil pump working
If you rebuilt it and don't have any parts left over sitting on the work bench I'm thinking it's working.
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12-07-2020, 08:35 PM | #12 |
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Join Date: Aug 2016
Location: West Virginia
Posts: 430
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Re: Verify oil pump working
Its a gear pump, almost bulletproof. If it is turning it is working. All it does is deliver oil to the valve gallery. Everything is gravity fed from there.
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12-08-2020, 05:38 AM | #13 |
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Location: VA
Posts: 1,410
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Re: Verify oil pump working
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12-09-2020, 10:52 AM | #14 | |
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Posts: 293
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Re: Verify oil pump working
Quote:
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12-09-2020, 11:05 AM | #15 |
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Join Date: May 2010
Posts: 433
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Re: Verify oil pump working
I did what Katy did... old tube, about $3 worth of parts to give a quick visual indication. I had rebuilt a pump with a kit from Brattons on my new AER engine and did the messy way, and it seemed way too long to get oil flow. So I bought a new pump from Brattons and installed my visual tube, and I had oil in 20 seconds. Much greater oil flow from a new pump vs my rebuild. And it was a pretty easy rebuild. Like some of the other posters, I felt that a gear pump submerged in oil is foolproof; now I’ll never use anything but a quality new pump.
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12-09-2020, 11:31 AM | #16 |
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Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,042
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Re: Verify oil pump working
Actually, all I did was install the vinyl tube. When I bought this A it had a piece of rubber hose on it. I suspect that some PO had a "short" version of the oil return tube and needed a "long" version for this engine, so they just cut it and used the rubber hose to extend it. I didn't like the idea of the rubber hose being exposed to hot oil so that's why I replaced it w/vinyl. Being able to see the oil flow is just a side benefit.
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