Oil pump gears question
12-01-20, 10:37 PM
#1
Oil pump gears question
Ok i need a guru here, I'm piecing out a 12a/13b hybrid and I'm having a hard time finding oil pump parts. I just wondering if anyone have use later (86-91) oil pump gear, chain and ecentric shaft oil pump gear with the 79-85 oil pumps? Thanks
12-02-20, 08:58 AM
#2
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the oil pump chain, and gears are the same from 1968-1985 and then 1986-2003 (didn't check the Rx8).
if you did try it, i think it would have to be the whole matched set.
if you did try it, i think it would have to be the whole matched set.
12-02-20, 06:44 PM
#5
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You're not making a 'hybrid", you're making a 4 port 13B, like Mazda built from '74 to '78. The only difference between 12As and 13Bs was the rotor width.
Use the 12A pump. It works just fine and doesn't cavitate at high RPM like the large pumps do.
Use the 12A pump. It works just fine and doesn't cavitate at high RPM like the large pumps do.
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