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04-02-2024, 12:10 PM | #41 |
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Re: Break-in gone wrong!
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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04-02-2024, 12:38 PM | #42 | |
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Re: Break-in gone wrong!
Quote:
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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04-02-2024, 12:45 PM | #43 |
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Re: Break-in gone wrong!
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04-02-2024, 12:45 PM | #44 |
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Re: Break-in gone wrong!
OK thank you Tubman. It makes more sense now.
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04-02-2024, 01:14 PM | #45 |
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Re: Break-in gone wrong!
if you stick the pickup in a pan of oil will the pump pump oil?
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04-02-2024, 07:40 PM | #46 |
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Re: Break-in gone wrong!
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04-02-2024, 10:02 PM | #47 | |
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Re: Break-in gone wrong!
Quote:
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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04-03-2024, 10:59 AM | #48 |
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Re: Break-in gone wrong!
Thanks for the replies. I will get back to you all with results after more inspection.
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04-06-2024, 02:43 PM | #49 |
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Re: Break-in gone wrong!
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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04-06-2024, 05:47 PM | #50 |
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Re: Break-in gone wrong!
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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04-06-2024, 06:55 PM | #51 |
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Re: Break-in gone wrong!
Does the cam gear, from post #35 spin when you spin the motor
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04-06-2024, 07:06 PM | #52 | |
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Re: Break-in gone wrong!
Quote:
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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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04-06-2024, 08:19 PM | #53 |
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Re: Break-in gone wrong!
yes it clears by about a half inch
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04-06-2024, 08:22 PM | #54 |
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Re: Break-in gone wrong!
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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04-06-2024, 08:33 PM | #55 |
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Re: Break-in gone wrong!
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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04-06-2024, 10:05 PM | #56 |
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Re: Break-in gone wrong!
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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04-07-2024, 01:20 AM | #57 |
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Re: Break-in gone wrong!
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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04-07-2024, 07:18 AM | #58 | |
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Re: Break-in gone wrong!
Quote:
https://www.joesantiqueauto.com |
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04-07-2024, 07:25 AM | #59 | |
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Re: Break-in gone wrong!
Quote:
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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04-07-2024, 08:09 AM | #60 |
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Re: Break-in gone wrong!
Cameron, did you have a chance to check the gear to cover clearance?
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