Here's a pic of the pump rod bushing as used on 49 - 53 blocks showing the groove. Not sure if the hole in the block is straight sided or not but if it is, the groove is important. Picture from the C&G web site.
i just refreshed my entire 8ba, and i was also leaving the fuel pump off to run electrical one so i didnt install the fuel pump push rod can i get a step by step on how to make shure im going to have good oil pressure please i dont want to waste a good rebuilt motor on start up..maybe a picture of what i need to do to make shure of good oil pressure ..thanks
Why couldn't you just take a bolt that's the same diameter cut it off so it just goes through the bushing and epoxy it in place.
You could do that if the fit was correct its not rocket science.It only has to go past the center as that is where the orifice is. T
I believe he left the bushing out(and the fuel pump rod),He posted that he plugged the hole and had 20 PSI,What concerns me is if he plugged the hole the oil is not going to get to the front of the engine thru the oil tube,I believe the bushing needs to be installed then plug the bushing(the oil will go around the grove on the outside of the bushing.
lorodz - years ago I wanted to run an elecric fuel pump, I fitted a freeze/welsh/core plug in the fuel pump orifice. I can't remember the size though
i just finally had my 8ba that has been freshly rebuilt run this week end, i used a meling standurd oil pump and did not remove the fuel pump rod bearing i left it inside the motor, i did infact remove the fuel pump rod, i primed the engine for about 2 minutes, and bam i instantly had about 40psi of oil pressure, before i started the motor i also removed the b,s oil filter and plugged every hole in the block with brass plugs except one for the oil pressure gauge, the motor runs beautiful at about 700 rpms i have 25 to 30 psi of oil,and thats with the motor at about 190 degrees ( no radiator hooked up yet) so the motor got a lilttle warm... im guessing the fuel pump rod bearing can be pressed back in if removed and it will build oil pressure...good luck. oh one more thing i rebuilt this engine entirely myself . i did not plug the hole i left it opend and everything seems to be getting oil as far as i can tell with no leaks anyplace ...do i have to plug the hole ubder the manifold where the pump rod goes through or no
The fuel pump bush has a hole in it that lubes the push rod. This is bleeding off some oil pressure. That is ok if you still have plenty of oil pressure after the bleedoff. The big problem occurs when you leave the bush out entirely. Then you have no oil delivered to the front part of the engine - big big trouble. The bush must be in place, the pushrod hole is better if filled with a pushrod or something to simulate it, but if it isn't filled it simply reduces oil pressure rather than killing it. I've never done this job myself, but what would be wrong with cutting down a pushrod and dropping it in the hole? Would it tend to pop out? Is there any easy way to hold it in? I was thinking of a plugging method that is easily reversible if a fuel pump was to be reinstated at a later date. Mart.
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