prime oil pump need help?
prime oil pump need help?
so i just put in a new engine and i tryed to prime the engine. i took out the fuel pump fuse and turned the key the oil pressure stayed the same it has oil in it and i dont know why it is not getting oil pressure any ideas?
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300ZXttZMAN
- Posts: 6800
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- Car: 1990 Nissan 300ZX TT 5spd pearl white
DD: 2008 Nissan Frontier NISMO pkg 4x4 Crew Cab - Location: Sulphur, LA 70665
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Re: prime oil pump need help?
Moved to Z32 Tech.
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es.biggs
- Posts: 2120
- Joined: Sat Feb 20, 2010 10:32 am
- Car: 1990 300ZX 5sp NA
- Location: Charlotte, NC
Re: prime oil pump need help?
When I did mine I used an oil filter with a fitting screwed into the end, a hose attached to the fitting, and a shop vac attached to the hose. Then turned the vac on and had a friend crank the motor over with no fuel pump fuse in of course. Oil started coming out of the filter after a few seconds maybe 5 or so.
This right here:
http://www.twinturbo.net/nissan/300zx/f ... -pump.html
I'd also recommend attaching a real oil pressure gauge while the motor has it's first run
This right here:
http://www.twinturbo.net/nissan/300zx/f ... -pump.html
I'd also recommend attaching a real oil pressure gauge while the motor has it's first run
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SLE-PR
- Posts: 48
- Joined: Wed Sep 21, 2011 2:33 am
- Car: 1992 Z32 A/T TT
1990 Z32 S/T NA
1990 Z32 A/T NA
Re: prime oil pump need help?
To follow up on my problem of priming the engine with oil on the stand. Thank-You es.biggs 
. I tried different things to get fresh oil circulating through the engine with a 1/2" drill on the crank nut. It cranked over about 300 rpm but wouldnt pick up until I took a new oil filter and drilled the bottom to fit a 1/4" npt barbed brass hose fitting and put a piece of clear hose and rigged it up to the shop vac. (clear so i dint suck it all out unknowingly..lol)
I turned it on and and proceeded to crank the engine with the big drill, within 10 seconds I had oil flowing. I removed the "dummy" filter and put the other one on and finished displacing the oil from cranking it with the drill. I checked the turbo drains to make sure they were getting lubed. I had about 35 psi on a tempory gauge I tied into the filter housing.
I did find a leak on the left rear cam sensor and pulled it out and used black RTV gasket to hopefully seal it off. I am feeling fairly confident now knowing the engine has oil circulated through it before I even install it and put it to the "ignition" stage.
This is one excellent idea when the other ideas dint work....Thanks again es.biggs
PS. This is a 700+ hp "built engine" that I dint want to take any chances on with no oil flow before installation.
. I tried different things to get fresh oil circulating through the engine with a 1/2" drill on the crank nut. It cranked over about 300 rpm but wouldnt pick up until I took a new oil filter and drilled the bottom to fit a 1/4" npt barbed brass hose fitting and put a piece of clear hose and rigged it up to the shop vac. (clear so i dint suck it all out unknowingly..lol)I turned it on and and proceeded to crank the engine with the big drill, within 10 seconds I had oil flowing. I removed the "dummy" filter and put the other one on and finished displacing the oil from cranking it with the drill. I checked the turbo drains to make sure they were getting lubed. I had about 35 psi on a tempory gauge I tied into the filter housing.
I did find a leak on the left rear cam sensor and pulled it out and used black RTV gasket to hopefully seal it off. I am feeling fairly confident now knowing the engine has oil circulated through it before I even install it and put it to the "ignition" stage.
This is one excellent idea when the other ideas dint work....Thanks again es.biggs
PS. This is a 700+ hp "built engine" that I dint want to take any chances on with no oil flow before installation.