Rai
22.04.2021 19:55:02
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This engine has only 30k miles since rebuilt and has no signs of gunk build up. I was thinking that maybe someone put too long of a bolt in the air pump mount that made a burr on the shaft. I am next going to try and lightly tap the shaft up toward the cam and see if I can move it at all. I have to remove the pipe plug and go through the hole to get a straight shot. If anyone has any suggestions, I am listening. Thanks, Todd more
I had one in my shop years ago with the same problem. I welded a peace of allthead to the rod and put a nut on it and pulled it out.
I had one seize on a 305. After some unrelated engine work, it refused to budge, was fine just before. The engine was extremely dirty inside, so much hard gunk on the valvetrain that some of the pushrods wouldn't move. Had to cut some in half to get them out.
it could be bent or mushroomed or rusted or galled. be careful trying so as not to ruin the bore. here
If the fuel pump rod is not stuck, and it does not move up and down when the engine is turned over, then most likely the camshaft would have to be replaced to restore the mechanical fuel pump function. The problem is that the fuel pump rod is ran off of an eccentric lobe on the camshaft itself, and that lobe has worn down until it is almost completely round and has no more lobe or "lift" to move the fuel pump rod, so the fuel pump rod will just sit there and barely move at all. more
The quickest and the cheapest way to get that vehicle back on the road without having to replace the camshaft is to simply remove the fuel pump rod, and then purchase a block-off plate for the opening where the mechanical fuel pump used to be, or just replace the mechanical fuel pump and let it do nothing but seal off that opening, and then install an after-market electric fuel pump, and since that engine should have a carburetor if it had a mechanical fuel pump (either that or it had a low pressure throttle body injection system that does not require a lot of fuel pressure), then an after-market electric fuel pump for that engine will not be that expensive, and usually less than half the price of an electric fuel pump that would be needed to run a fuel injection setup. Let me know if you require any further assistance or any assistance with connecting an after-market electric fuel pump.
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Hey guys, i have a 454 BBC and we bought a new fuel pump for it. We used a fuel pump push rod from a small block because our motor builder had told us it would work. When my father had put taken the motor back out of my 55 chevy he had installed the fuel pump and realized that the rod did not put any tension of the fuel pump arm. We compared the new fuel pump to another off of an older 350 SBC and we realized that the arm on the new fuel pump was even longer. We do not know if the rod is to short. Our question is, is the fuel pump push rod the same in a BBC and a SBC, or do we need to try a different fuel pump?
Age: 59
Loc: Kansas
Reg: 02-16-03
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Corvettes owned: '74 '77 '78 L82 Silver Anniversary, 2002 LS1, 2007 C6 Love this one! [links]