I saw another thread going about our fuel pump pushrods, and naturally there's folks responding with their own bad experiences and even some pictures of worn-down ends, but it got me thinking....
It just doesn't take a ton of force to move that fuel pump arm. You can hold a pump in one hand, and operate the lever with the other. In addition there's oil (presumably) getting to the ends. So while it very well could be just inferior metals, for something that *shouldn't* be seeing a lot of pressure even at it's max stroke, they sure seem to be causing all kinds of hell...
Are there other possibilities worth considering? Is there anything else that could wear them down like that?
Pump arm manufactured at a funky angle, or other pump defect that that puts excess pressure on the pushrod, like the arm bottoming out?
Eccentric lobe finished too rough? Or not ground correctly, putting excess pressure on the pushrod?
Installing them without assembly grease causing a bad wear situation from start-up, like we've seen with lifters and other parts?
It just doesn't take a ton of force to move that fuel pump arm. You can hold a pump in one hand, and operate the lever with the other. In addition there's oil (presumably) getting to the ends. So while it very well could be just inferior metals, for something that *shouldn't* be seeing a lot of pressure even at it's max stroke, they sure seem to be causing all kinds of hell...
Are there other possibilities worth considering? Is there anything else that could wear them down like that?
Pump arm manufactured at a funky angle, or other pump defect that that puts excess pressure on the pushrod, like the arm bottoming out?
Eccentric lobe finished too rough? Or not ground correctly, putting excess pressure on the pushrod?
Installing them without assembly grease causing a bad wear situation from start-up, like we've seen with lifters and other parts?
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