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Discussion Starter #1
i am getting around to installing a hrc oil pump, relief valve and deep sump. i find no info in any manual whether it be the hrc install or factory service version as to what steps to prime oil pump, no means to access pump drive when pan is back in place and full of oil to prime it. so how do i get oil pressure or at least the pump full of oil for initial start up
 

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I havn't seen the inside of your motor, but in hondas past the oil pump was driven by a chain off the clutch basket on the transmission input shaft.

Used to be that you could put the pan on, hold the pressure relief valve in with your thumb and spin the pump drive gear with a 10mm socket on a drill. This would be with the clutch basket removed. You can feel the oil pump load up as the pressure builds. I usually wait until I see a good amount of oil running down from the head before putting everything back together. I would typically tilt the motor back on the bench a little bit to keep the oil running back into the pan instead of onto the workbench.
 

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Another option, which I have also done, is while the motor is on the bench, pull all the plugs and spin it with the starter until you see oil running out around the cams. Or if you have a sight glass, you can watch the oil level drop.
 

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Discussion Starter #4
oilpressure

motor still in frame, i will possibly click it up into 6th gear and rotated the rear wheel for a while, what puzzled me was when i pulled the oil pick up tube off, a bunch of oil was trapped in the tube itself, i will also fill/prime it before install
 

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You don't prime it. You put it together with a light coat of assembly lube and you're done. All the hrc oil pump kit consists of is a bigger sprocket, longer chain, different pressure relief and a special bolt so the chain and sprocket clear the transmission plate. There's also a different bearing holder. The pump body is still a stock oem unit. Put some assembly lube in the pump, not too much, button everything up then turn the motor with the starter, kill switch off. It will build pressure really fast.
 

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Discussion Starter #6
oil delivery

You don't prime it. You put it together with a light coat of assembly lube and you're done. All the hrc oil pump kit consists of is a bigger sprocket, longer chain, different pressure relief and a special bolt so the chain and sprocket clear the transmission plate. There's also a different bearing holder. The pump body is still a stock oem unit. Put some assembly lube in the pump, not too much, button everything up then turn the motor with the starter, kill switch off. It will build pressure really fast.
a larger gear sounds like they slow the pump down, does this make sense. does the pressure relief valve have a higher relief pressure or lower
 

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Discussion Starter #7
oil pump drive

diel
i now realize that pump is same part number as O.E unit
what puzzles me is why use a bigger gear that would slow oil pump gear ratio and in turn also slow waterpump that drives from opposite end of oil pump as larger gear. can you tell me if oil pressure relief is of higher or less spring tension and if any or what benefit is provided by using hrc pump drive package
 
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