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#41 |
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Join Date: Aug 2010
Location: East Boothbay, Maine
Posts: 282
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I agree with deuce roadster. Something does not seem right. I am not totally familiar with Ford oil pumps, however I am familiar with metering gear pumps. I have never seen a gear pump that did not have tight clearances between the gear faces and outer diameter and the pump body. Maybe I'm way off base but looking the photo I don't understand how this pump can pump anything. Are these the wrong gears in this pump?
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#42 | |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,445
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The gears looked funny to me too, until I realized that there was an odd perspective in the photo. As soon as I got my eyes right the optical illusion of a "dished gear" went away. |
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#43 |
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Join Date: Mar 2014
Location: Jacksonville FL
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#44 |
Senior Member
Join Date: Aug 2010
Location: East Boothbay, Maine
Posts: 282
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OK thank you Tubman. It makes more sense now.
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#45 |
Senior Member
Join Date: May 2010
Location: on the Littlefield
Posts: 6,185
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if you stick the pickup in a pan of oil will the pump pump oil?
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#46 |
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Join Date: Jan 2011
Location: Central Ohio
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#47 | |
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Join Date: Apr 2019
Location: Kansas
Posts: 1,005
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Yes, it is possible the pump lost prime. How much clearance did it have between gears and pump cover? If it had a gasket there, how thick was it? Some gaskets are way too thick and will cause a no-pressure condition due to inadequate "suction" on restart after a hot oil run period. I like to see .002-.007" clearance...lower number preferable if possible.
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#48 |
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Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
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Thanks for the replies. I will get back to you all with results after more inspection.
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#49 |
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Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
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IMG_20240406_123311698_BURST003.jpg
The oil pump works when i turn it by hand in oil. I cannot make the cam gear spin. Maybe it was just a fluke??? I'm bamfoozled!
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#50 |
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Join Date: May 2010
Location: NJ
Posts: 6,274
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I doubt this was the problem, but are you able to check to make sure the oil pump pick up sits up off the floor of the pan?
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#51 |
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Join Date: May 2010
Location: Holland Mi
Posts: 649
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Does the cam gear, from post #35 spin when you spin the motor
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#52 | |
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Join Date: May 2015
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
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#53 |
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Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
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yes it clears by about a half inch
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#54 |
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Join Date: Oct 2021
Location: Willows, CA (rural)
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yes and I held the idler gear with a channellock pliars and turned the motor over and it forced the gear to turn. I could not hold it from turning.
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#55 |
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Join Date: Sep 2016
Location: sydney australia
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its certainly odd but check the driving gear within the pump itself and make sure its positively locked to the shaft [keyway, dimple, weld, spline it doesn't matter ] but interference fit wont work for long . Cummins had major dramas with this in its Bigcam 3 series the pump gears would slip under load and oil pressure would disappear the fix was a new repair kit for the oil pump with keyed shaft and gear
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#56 |
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Join Date: May 2010
Location: Alabama
Posts: 3,281
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I’d change the pump since you have it out. Sounds like everything else has checked out but the pump is an easy change.
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#57 |
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Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
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Is melling m-19 worth putting in? I kept the stock pump cause some said it would be better than a new unit... Definitely not opposed to putting a new one in. The Speedway unit is cheap, but you probably get what you pay for?
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#58 | |
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Join Date: May 2010
Location: NJ
Posts: 6,274
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https://www.joesantiqueauto.com |
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#59 | |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,445
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I believe "Ol' Ron" on this forum has expressed a dislike for Mellings pumps. I cannot speak for him; maybe he'll chime in. From everything I have experienced and heard, a stock Ford pump is your best bet. |
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#60 |
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Join Date: Apr 2019
Location: Kansas
Posts: 1,005
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Cameron, did you have a chance to check the gear to cover clearance?
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