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Old 10-13-2020, 01:21 PM   #9
tubman
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,260
Default Re: Melting M19 oil pump

I don't know about Melling, but avoid aftermarket pumps like the plague. On my last build, I used a Speedway Motors pump to save a few bucks. The engine started right up and ran fine, but would idle at 15 psi hot and max out at 40 psi. That's OK I guess, but not what I'm used to. I sent some original pumps to "flatjack9" above, and he graciously tested them for me. They all tested good, so I used the one that I knew was from a low mileage engine. After I installed it, I got 25 psi hot idle and a max between 55 and 60, which is what I am used to.

The only problem is I now have a slight leak at the rear main seal that was bone dry before. I gues you can't re-use seals no matter how careful you are.
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