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I have broken 2 Holley fuel pumps , one right after the other. First pump had run for at least a couple years, then the casting broke. Replaced it and about a week later it broke in the same place. Anyone else had this problem? Could be just bad luck, but somehow I think something else is going on.
Mechanical or electric pumps?Quote:
Originally Posted by figure8
mechanicalQuote:
Originally Posted by Dave Severson
What brand of engine?
could be the rod is to long??? Chevy. bolts loosen and gets sideways??
Have you changed cams?
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Try a double gasket.
I’ve seen that happen to a couple other guys also, although I don’t know why. The only thing I can think of is maybe the cam lobe that operates the fuel pump has too much lift, or it was ground with to aggressive of a profile. It could be a tolerance stack up between the cam, block, and push rod.
If it has too much lift, the double gasket trick may fix it, or cut out a spacer shim from a piece of sheet metal, or grind the push rod a little shorter.
thank you. I'm changing to a Carter pump, and I will double gasket it.
Make sure you have the correct push rod for a small block---------
and did you change cams?????????????????
OK I finally got it figured out. Was looking the wrong place. The engine was loose on the mounts and would slide into the frame. Fixed now.
Wow I would.never have guessed THAT.
I had it nailed from word one, just wanted to keep everyone guessing. **)Quote:
Originally Posted by firebird77clone
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But the computer download didn't show it--------------
Well there you go. Easy fix at least. What kind of car/frame are we talking about here? Is the pump pretty close to the frame?
figure 8 race car with a Nova stub. Didn't realize the engine was moving from side to side. Solid mounts and an easy fix once I realized the problem.
also big engine set back and offset to the right for weight distribution ( car turns both ways, so offset drivers weight). made the pump pretty close, maybe 3/8"Quote:
Originally Posted by figure8