Studebeggar Posted June 8, 2022 Share Posted June 8, 2022 don't buy Airtex mech pumps they are junk..bot two one for 37 dodge d5 and one 37 plymouth p4..both failed right away one week...one pin came out on arm and left walking the other diaphram small arm broke and left me walking ..electric ??? Link to comment Share on other sites More sharing options...
StillOutThere Posted June 8, 2022 Share Posted June 8, 2022 Were these new through a parts house or rebuilts or just exactly what? Link to comment Share on other sites More sharing options...
JFranklin Posted June 8, 2022 Share Posted June 8, 2022 Did they have a warranty? Link to comment Share on other sites More sharing options...
Studebeggar Posted June 9, 2022 Author Share Posted June 9, 2022 they were billed as new thru a popular auto supplier Link to comment Share on other sites More sharing options...
c49er Posted June 11, 2022 Share Posted June 11, 2022 A very common and well known problem on new fuel pumps for flat head MoPar engines. I don't understand why the known issue has not been fixed. Link to comment Share on other sites More sharing options...
Bloo Posted June 11, 2022 Share Posted June 11, 2022 I suspect for any 1937 car the original fuel pump can be taken apart with screws. Get an original one and rebuild it using ethanol-resistant parts. Verify that the check valves hold vacuum while you have the pump apart. Then-N-Now is a possible supplier of parts. 2 Link to comment Share on other sites More sharing options...
Studebeggar Posted June 11, 2022 Author Share Posted June 11, 2022 great replies....does anyone know that correct number pump for 37 ply p4 and 37 dodge d5...ones i bot were 587 but they don't work ? went to ebay and found several numbers ..436,428,587, and many more these said they fit 37 dodge and ply ???why so many numbers ??? Link to comment Share on other sites More sharing options...
TerryB Posted June 12, 2022 Share Posted June 12, 2022 I think AC587 was the original pump. Lots of other manufacturers jumped in to make pumps and used their own numbering system. Link to comment Share on other sites More sharing options...
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