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Oil Pump Parts


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Hi Everyone,

I need to rebuild my 1974 M10 oil pump and would like to find the parts below...... pressure relief valve spring and seal, wear plate for the vane. Any ideas of pn's or vendors who may have these?

Any and all advise is welcome. This seems like a hot topic!




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Truth be told, those oil pumps last a long time.  The factory shop manual (available on-line here on the FAQ) gives you all the clearance dimensions of the pump's innards--between the gear teeth, gear to housing both horizontal and vertical. 


Chances are, unless the engine's oil change intervals have been shamefully neglected, you won't find much--if any--wear.  When I pulled my engine down at 204k miles for a rebuild, the original pump showed essentially no wear; I only replaced it because I found a super deal on a NOS E21 pump, requiring only a pickup base swap to work in an '02.   The only thing I did to my old pump before putting it aside as a spare was to wet sand the aluminum base that the gears spin on just to get it flat.  


New pumps are stupidly expensive, so if your old one checks out good dimensionally, I'd reuse it--and add an oil pressure gauge.



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