Oil Pump


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By paul2748 - 15 Years Ago
I am looking for an oil pump for my 56 312. I see a lot of them on ebay, plus the old car parts vendors, maybe NAPA and then some one like John Mummert. Does it make any difference where to buy? I do not want to buy by price, quality matters more to me than a couple of bucks.



Any suggestions?



Thanks for your help.
By Duck - 15 Years Ago
Paul- Check w/ Summit Racing- I bought a Mellings pump from them for the 'bird... Good price too, IIRC...
By Rono - 15 Years Ago
I passed-up on the cast iron Melling pump for the aluminum bodied georotor pump. I've heard that they provide a more even flow than the gear type pump. They do make rebuild kits for them, but I haven't found any aftermarket pump bodies. What does everyonee else think?

Rono

By Dennis K. - 14 Years Ago
Same thoughts about the earlier cast iron body gear vs. the later gerotor type oil pump.

If you are looking for the later design aluminum body Ford OEM gerotor pump, I would watch eBay for a NOS in the box one, C0AE-6600-D or C1AE-6600-A, I bought a couple of them that way.  Regardless, even if new I would dissasemble the pump and inspect it, even a new Melling.  Better safe than sorry.  

Regards,

Dennis

By aussiebill - 14 Years Ago
Dennis, interesting point about pulling apart and inspecting new oil pump, never in 40 yrs did i find a problem until recently with brand new mellings, it had terrible tight spot at one point turning by hand, upon dismantling, the 2 gears had scuff marks on the teeth and when fitted to block just locked up, i feel misalignment in the machining axis of the shaft center line, any how back for exchange pump and much normal finish on the new pump gears. Best wishes for the new year.Smile
By Dennis K. - 14 Years Ago
Hard to know on a general rebuild of any engine if the mechanic inspects the oil pump. 

Years back I had a friend at work rebuild his race Cleveland engine, replaced oil pump (probably a Melling) fired the engine up and ruined the crank because the relief valve was stuck and dumping the oil pressure.  Years back when I used the alum Ford pump on my 427's I would install the H-M deep rotor kit and the pink 100 psi spring, so the pump came apart by default.  Since you can't find that stuff anymore and have since used Melling HV pumps, I still dissasemble and also monitor oil pressure.  One can do the same with a Y block oil pump or any oil pump for that matter.  Just cheap insurance, even with an NOS part.

Regards,

Dennis

By Fordy Guy - 14 Years Ago
When I rebuilt my 292, I bought one off of e-bay that was a blueprinted Melling. There is one on e-bay now if you don't mind the price. Also get the heavy duty shaft too.
By Ted - 14 Years Ago

Dennis is absolutely right about checking out the new pumps before installing them.  Any new oil pump needs to be disassembled and thoroughly examined before using it regardless of the engine it’s going on.  ‘New’ doesn’t necessarily make it right and I’ve saved myself some serious grief over the years simply taking the additional twenty minutes it takes to disassemble a pump and make sure it’s right.  Using a speed handle to prelube the engine instead of a drill has also isolated oil pump issues before hand that would have been overlooked if using a drill motor for priming purposes.

 

My own preference for the Ford Y is still the gerotor pump design over the earlier spur gear pump design.  Although new gerotor oil pumps for the Y-Block are not readily available, the rebuild kits for them can still be purchased through the various supply outlets.  The most desirable gerotor pumps are the older aftermarket units that were made from iron instead of aluminum but if you have a good oem alumium pump to use as a core for a rebuild, then by all means use it.

 

Here are some links to past oil pump discussions.

Blueprint specifications

Design differences

Effect on the ignition

Identifying gerotor and spur gear pumps

Interchangability of pumps

Preoiling the engine

Rebuild kit for gerotor oil pump

Shimming the relief spring