1JZ Oil Pump Priming after rebuild?

[MX83GT]

Hi all,

I am just doing a rebuild on my 1JZ and have had the oil pump etc off the engine and am concerned that the pump will require priming prior to use. I know I will be able to do this through the pressure relief spring access, but can anyone tell me if it is actually required.

I've looked around a lot of forums and have had no success with getting the appropriate sections of the workshop manual.

Any help would be appreciated from the 1JZ technophiles out there.

Cheers,

Andrew

[2jzhilux]

I usually just pack the oil pump full of vaseline and use a good assembly lube then crank it till it has oil pressure, i think people who prime the oil pump are just being paranoid.

[jimmmayyy]

+1 what he said.

just take the plugs out and crank until you see pressure. then its ready to fire.

[oldcorollas]

I usually just pack the oil pump full of vaseline and use a good assembly lube then crank it till it has oil pressure, i think people who prime the oil pump are just being paranoid.

where does the vaseline go?
pump should only need a film of oil in it to be able to draw air/oil up into it,, rather than solidly packed with grease/vaso/etc?

still better to reduce the time the engine cranks on only assembly lube.. if possible.

[CELICASUPRA7M]

just lubricate the pump with clean engine oil or vaso like 2jzhilux said and crank it till u get pressure.
plenty of assembly lub on the mains and big ends too!

[MX83GT]

Thanks for the help guys.

Cheers.

[2jzhilux]

where does the vaseline go?

Into the oil once the motor fires and turns to liquid when it gets hot, i cant see how 200 grams of vaseline will hurt anything especially when the motor is full of assembly lube.

I ve just been taught to do it that way might be good or not but its worked in the motors i have built and id rather not risk having to pull the oil pump out or sump off when the coating of oil doesnt work.

[87lux]

just lubricate the pump with clean engine oil or vaso like 2jzhilux said and crank it till u get pressure.
plenty of assembly lub on the mains and big ends too!

i know you probably meant to say this but make sure you only lubricate the side of the bearing that is contacting a moving part.

[MX83GT]

Yeah, I had read it that way as I have done quite a few engines before, just hadn't thought about the oil pump as much as I have for this one.

[oldcorollas]

can you "reverse fill" it through the oil filter mount?

[MX83GT]

You probably could fill it through the filter but awkward. Easier to fill through the pressure relief spring access as it is at the top of the pump, and very easy to get to when you are rebuilding. (normally would require removal of harmonic balancer and lower cam belt cover)

[87lux]

honestly the best method has already been said which is pulling the pump apart and filling it with vaseline or similar. By doing this it makes it that little bit quicker to drawn oil up on first startup. I've been told that when doing this you need to make sure that if you remove the gears that you make sure they go in the same way. Apparently there can be a bevel cut on one side and not the other.

[DrNick]

Sorry to jump in but any tips before starting an engine that has been sitting around for a
year?

I put a bit of oil in the plug holes and turned it over by hand a few times. I took the cam cover off and it wasnt completely dry in there but getting there, I poured half a litre of fresh oil over the cams while I had the cover off. But the filter and all are bone dry.

[JZA70 R]

i know you probably meant to say this but make sure you only lubricate the side of the bearing that is contacting a moving part.

as opposed to what? ...feel like im missing something here?


Is packing a used oil pump with a still lube totally necessary? ...I could understand a brand new pump that may or may not only have assembly lube inside but a used pump will have a fine coat of oil on every surface inside the pump wont it? I can understand priming the motor and hence pump with oil before startup though.

Also what is the idea behind packing it with lube? ...to help the pump suck oil up or to just avoid metal on metal contact?

When you say packing the oil pump does this entail disassembly of the pump via the countersunk phillips head screws on the back of it?

[2jzhilux]

as opposed to what? ...feel like im missing something here?


Is packing a used oil pump with a still lube totally necessary? ...I could understand a brand new pump that may or may not only have assembly lube inside but a used pump will have a fine coat of oil on every surface inside the pump wont it? I can understand priming the motor and hence pump with oil before startup though.

Also what is the idea behind packing it with lube? ...to help the pump suck oil up or to just avoid metal on metal contact?

When you say packing the oil pump does this entail disassembly of the pump via the countersunk phillips head screws on the back of it?

I think he means dont lube the backside of the bearing shells as you dont want them to spin in the block.

If you have the motor apart to the point where the oil pump is off i would pull apart the oil pump (the countersunk screws) and pack it with some vaseline but also to inspect the rotor and housing for wear. Keep an eye out for the matchmarks on the rotor and housing.
I think the idea behind the vaseline idea is the pump will have a hard time drawing the oil from the pickup when its just sucking air.