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Re: Pump Priming Problems.
You should try to pack the gears and pump cavity with petroleum jelly which will prime the pump and the oil will then displace the jelly. If you use any other kind of grease, the oil will not be able to displace it so make sure you only use petroleum jelly. This is the stuff used in the medical field but works great for this purpose too. Let me know how it goes and whether you have any further questions. Thanks and good luck
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A recommended practice was to pack the new pump with Vaseline jelly. I think it was to prohibit wear or friction on the pump gears at initial start-up until the oil got to them. It may have also helped create a little suction to pick up the oil. That's the only "priming" I could think of. If the engine has been down awhile and not running, disable the ignition system and crank the engine over in spurts- crank for 15 seconds, let starter cool off for one minute, then crank another 15 seconds. This will get the oil circulating all through the engine. Watch for oil in the top end at the valve cover, with the oil filler cap off. When you are sure the oil is getting topside, you can reconnect the ignition and fire it up.
What kind of engine is it? As far as the pistons go you should have used motor oil or the like on the rings when you installed them. If you're talking fuel and it's a fuel injected engine, you shouldn't have to prime it as the fuel pump pressurizes the system and shouldn't need any other source.
it's not priming.
that grease trick helps.
is this some china pump off fleabay or a real jeep pump..???
did you do the below.:
1: the grease sure. and then prime the filter and the gallery behind the
2: With fuel and spark defeated, and spark plugs removed then with pressure gauge attached to sender port, did you crank it to get max pressure (my guess is this is the step you are posting on.)
i never start any engine, (after majors) unless i get #2 to work first the number 3, which is top end oil checks.
the pump is no priming.
In pro shops they make up a priming tool. so new engines are never
started, 1st time dry, ever.
one way is just a tank full of oil and shop air, and 2 valve.
maybe the new pumps relieve valve is stuck open, fully.
i rebuild my own classic engines, after all that work !!! i never
ever, skip these steps.
and for 100% sure, good pressure, and top end oiling on any major work.
one of the top brand pump makers. VIDEO
Turn the ignition key to the ON position without starting the engine
You should hear the fuel pump priming for about a few seconds then shutting itself off.
If not hear replace the engine oil pressure switch
The 3rd wire to that switch is the pumps prime switch lead.
When the engines oil pressure is reached the computer will shut that circuit off and turn on the fuel pump relay
If you hear the pump prime the relay maybe at fault instead
first check fuel pressure with a mechanical fuel gauge that attaches to fuel line schrader valve. around T.B.I. if no pressure with key on check fuel pump relay for correct operation, and also the oil pressure switch has the fuel circuit to it so possible oil pressure switch also. fuel pump has a check valve to keep fuel from going back to tank, so when u turn key on fuel pressure should go up within 1-2 seconds on gauge. if fuel pressure goes down quickly, possible bad fuel check valve, change fuel pump and fuel pump check valve (located right above fuel pump inside tank)
Best way to draw a prime is to put a long screwdriver blade (no handle) attached to an electric drill down into the oil pump drive slot (distributor removed). I actually use a distributor that has the top cut off without the cam gear, and just attach the drill to the shaft, but the screwdriver works pretty well too. Only other option is to pack the inside of the pump with light grease, but that would require pan removal and I doubt you want to do that!! Many pumps are replaced because of low pressure but the cause is generally a bad bearing...If that's the case you may find it difficult to prime.
Oil pump is self priming. You do not need to prime it. If not showing oil pressure, the sensor is probably defective. Make sure oil level is not low. If the vehicles water temperature gauge shows normal when running then oil pump is working fine. If it goes to the overheat mark then you may have defective oil pump, which is rare. Most temperature gauges go past the middle when you first start up but then drop back to normal once the engine thermostat opens up. Hope this helps.
It sounds like you are talking about a diesel engine as gas engines are self priming. Lift pump or primer pump may be defective. Check for loose fittings or lines and damaged o-rings at filter housing. Sounds like you are sucking air somewhere.
put a can of STP oil additive into the engine if this doesnt work put another one in,if still no joy try changing the oil pump.if you dont want to change the oil pump then put 3 cans of STP in engine and sell it quick