Another oil pump question
Another oil pump question So I went and bought a melling replacement pump and when you spin the shaft it makes a knocking noise. When I spin my old one it does not do that. Does any one know if this is normal before I install it? Thanks for the help
unfortunately, that's fairly typical of the low quality Melling budget line of pumps. Either inspect and use your stock pump, or return the new pump and get one their "Melling Select" pumps.
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with that said, many go with the "select" series of pumps. more because the housing is stouter but there may be better machining of the gears themselves
unless there is something wrong with your original pump, I would go with it and the GM white spring (higher pressure)
Buy a new Gm oil pump. After I've had melling failures at 137 miles and other buddies having major failures they are not worth the metal they are made of. Toss it in the trash and get a gm pump.
