1JZ Oil Pump Priming after rebuild?

[87lux]

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

Yeah that's exactly what i mean.

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.

Yeah that's right. Even if the oil pump is new it's good insurance to pull the cover off the pump and put vaseline inbetween the gears.

[oldcorollas]

smearing gears to allow it to form a nice vacuum seems ok, but filling the space between the gears, and then needing to force that thick vaso out through the galleries and bearing shells doesn't seem like that a great idea?
when engine is hot it might melt, but it takes time for the block to get hot enough to melt it if it gets stuck in the galleries... and in the meantime a bearing has starved?

or maybe it is fine

[JZA70 R]

hoping the oil pressure seen at cold startup would make light work of the vaseline even through tiny oil galleries...

[TRD_021]

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.

take out the spark plugs, make sure they’re a dry and clean, before crank it disconnect the main lead of the rotor cap, and crank for about 2 to about 5 secs, it will not start. This will move the oil in and lubricated the cams everything else that needs oil. Plug the main lead and fire it up.


OIL PUMP

You need vaseline/grease to create pressure/ sucksion cause normal oil are too thing (mineral oil). Also when your braking in an fresh oil, you need to start it and idle it for about 20 minutes at 2000 rpm but this time the Vaseline will be all melted and gone...(mixed into the oil) offcourse you don’t rev it until you're are certain the you have oil pressure. after 2000 ks then it’s ready for an oil change and ready for synthetic oils

[wtfauto]

The clearances in the pump are tight enough that even 100% dry of any lube, it will still draw oil and lubricate itself very quickly.

Rather than go pulling the pump apart, its easy to simply tip some oil down the holes (if the pump is off). If the pump is on the motor.. you could probably remove oil filter and jam some oil back down the block to the pump also.

The vaseline or heavy assembly lube is a good idea.. but its not necessary. The engine will start every day of its life henceforth with nothing but a coating of engine oil inside it... this is all you need.

-Tristan

[mattysshop]

i always use good assey lube on the bearing shells etc etc, but if i run out, or assebling the cams/ pump/ etc etc i just use enigne stop smoke.. cos it's super thick.. and leaves a good thick coat on everything..

[matty12]

just bumping this up

Trying to get oil pressure on a 2jz that been apart.Anyone got diagrams of the oil system so i can back fill the oil pump to get pressure??Dont want to get into the whole do or dont arguement,ive always primed oil pumps to get oil pressure straight away so that what i want to do.Ive such the web but not much is around.

[allencr]

No need at all to fill with vasoline/grease/assembly lube, just a smear on its pieces will last for at least a year before it gets cranked to prime it.
It will not get to the bearings as a big glob unless there is so much of that shit that the filter is clogged with it and the filter has its bypass valve open up.

[matty12]

the engine is allready assembled in the car at the mo,we are trying to get oil pressure before be fore trying to start it,spinning it up with the plugs out

[JZA70 R]

are you saying you have already tried cranking it and its not getting pressure?

[matty12]

Yeah spun it over a few times and no go.it wasnt filled or anything wen my mate put it together.tried priming through sender hole and of the external lines fpr the oil cooler but nothing yet.

[S. Lowlux]

Not nice, do not like the sound of that.
Pump is turning I take it.
Don't know about this engine in particular , but do know that some designs just will not pick up at all unless the grease or vasso is first applied.
I killed P38 V8 that way .
You are wise to be wary.
Owen

[matty12]

Ive done many 308's and always filled the oil pump with moly grease as they wont pick up oil unless there is something in it. Even my 1uz was the same, pulled off the filter mount and fill the pump up with a oil can.