How do you prime the oil pump?

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so i used the pressure tank with about 4qts in it. have 6 in the pan as well. 60psi air and bumped engine with starter after about 2qts pre pressured into sensor T tap for turbo feed lines. i could hear the oil spraying out of the piston oilers. that made me smile but dont know if oil in pump will drain back to it. i have lots of assy lube on everything anyways. so i think i should be ok.

any thoughts on this?
 
Technically you can pressurize the oil system that way, but I would suggest you go through the port on the oil filter housing so that the oil travels through the oil filter before it hits your bearings. I know it can be a pain to access but if you can't get to, I would make damn sure everything is as clean as you can get it if possible to prevent contamination. Just my 2 cents
 
Also, I would pressurize it and turn the motor by hand backwards to get oil in the oil pump gears so they are primed. I'm sure it's fine, just my OCD. You did get oil in the bearings so it's good on lube on that side of the oil pump. Good job!
 
Cudazilla said:
Technically you can pressurize the oil system that way, but I would suggest you go through the port on the oil filter housing so that the oil travels through the oil filter before it hits your bearings. I know it can be a pain to access but if you can't get to, I would make damn sure everything is as clean as you can get it if possible to prevent contamination. Just my 2 cents
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i would have to completely disassemble my coilovers, fuel pump, exhaust removed to gain access to those ports. its that tight in there. just gonna cross my fingers im ok. will heard the filter fill up before oil when anywhere else. so that should be ok.
 
This is how I primed my 5.7, but you can only use this tool if you are running an aftermarket timing set:
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It doesn't show it in the video, but I rotated the motor a couple of times and re primed to make sure it was getting all the nooks and crannies. I was able to get 70psi without running the drill full blast, but I had the valve covers off so I was starting to make quite a mess on the floor!
P.S. If you have no oil pressure 1st place to look is the O ring on the pickup tube. I actually had a brand new Melling oil pump that would not produce oil pressure and leaked at the back of the unit. If I had tested with another method I NEVER would have found this and been able to replace the pump before I started the motor and caused major damage!
 
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Has anyone tried submerging the pump in oil? Rotating the gears periodically. I was thinking that if packing the pump with assembly lube or petroleum jelly works, wouldn’t the oil soak work?
 
Mine was primed by over filling the engine, starting the engine , shutting it off and draining out the excess oil.
 
Just throwin this out there. I've actually seen assembly lube keep an oil pump from pumping. It was not on a Gen3 Hemi, but a small block. It was an HV pump, too. I never wouldda guessed that'd happen, but it did. Maybe the Gen3 Hemi pumps are made in such a way that won't happen. It sure did on a small block, though.
 
Good thread. I’ve been thinking about this for my hellcat swap. I swapped the pan and pick up but that’s all. Does everyone think priming is necessary for a crate engine? Does the factory prime the crates or even do it in new cars?
 
erict said:
Good thread. I’ve been thinking about this for my hellcat swap. I swapped the pan and pick up but that’s all. Does everyone think priming is necessary for a crate engine? Does the factory prime the crates or even do it in new cars?
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I think it depends on how long the engine has been sitting. Keep in mind it’s a long was from the pick up to the pump. You’re going to have an air pocket to deal with.
To be safe I’m going to pressure prime my new 6.4. I just haven’t figured out the details.
 
Power Nation did an episode on priming the Gen 3 Hemi’s. I’m sure you could find it.
 
5.7 hemi said:
Power Nation did an episode on priming the Gen 3 Hemi’s. I’m sure you could find it.
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Just watched the video. Sure wish it was out 5 years ago when I primed mine for the first time. This is going to make it easy for the new engine.
 
When I did my swap I had no idea how long the engine had been sitting. After I got the engine in the car and ready to start, I pulled a plug from each cylinder and cranked it with no compression until I had oil pressure. Put the plugs and coils back on and fired it up. No problems.
 
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