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New old pump priming question

Old 08-16-2018, 11:05 AM
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Oil pump priming question

92 22RE

Got a new oil pump and did a search about priming. Some use vaseline, some use assembly lube, some use nothing and just crank the engine with the coil wire off. I have both vaseline & assembly lube, but wondering which one will work better, or a combination of the 2? How much vaseline or assembly lube do you pack in there?

Also, should I remove the 22mm bolt/spring on the pump and add oil in that hole to help prime? I do want to remove that bolt anyway just to make sure they didn't leave the spring out.

I do have the valve cover off, so last step before starting will be to pour oil directly on the rocker arms.

Thanks!

Last edited by Paul22RE; 08-16-2018 at 11:27 AM.
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Old 08-16-2018, 01:08 PM
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Toyota doesn't recommend (one way or the other) "priming" the oil pump.
http://web.archive.org/web/201501160.../58oilpump.pdf

Since you need to use sealant on the pump, I would be concerned that the "priming" grease would mess up the sealant. So I would follow the FSM, not prime it, and try to assure a good seal.

If you're going to crank the engine with coil wire off, you'd be well advised to remove the COR as well. Otherwise, you're still pumping fuel; and you could end up with a lot sitting in the exhaust system.
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Old 08-16-2018, 01:38 PM
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It seems to me that it would be better to crank with the EFI fuse pulled. That will shut down the fuel injectors, and I think the ignition as well, although I'm not 100% sure. In any case, the engine won't start with the injectors shut down, and no fuel will be sprayed anywhere.

Just pulling the high voltage coil wire leaves the high voltage from the coil with nowhere to go, resulting in possible arcing and carbon tracks where you don't want them. I know it's often done that way, but I don't think it's the best method.
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Old 08-16-2018, 03:05 PM
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Yes, EFI fuse is a better choice.

(I was doing ignition system testing, and wanted to be sure the fuel flow was off. But the EFI fuse takes out ignition too, so that wouldn't have worked for me. Taking out both ignition and fuel is exactly what Paul22re wants!)
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Old 08-17-2018, 04:15 AM
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Originally Posted by scope103 View Post
Toyota doesn't recommend (one way or the other) "priming" the oil pump.
http://web.archive.org/web/201501160.../58oilpump.pdf

Since you need to use sealant on the pump, I would be concerned that the "priming" grease would mess up the sealant. So I would follow the FSM, not prime it, and try to assure a good seal.

If you're going to crank the engine with coil wire off, you'd be well advised to remove the COR as well. Otherwise, you're still pumping fuel; and you could end up with a lot sitting in the exhaust system.
Only sealant in the assembly goes on the one bolt, right? Is it RTV silicon or FIGP ultra black or gray? Whole bolt gets coated or just the threads? Thanks
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Old 08-17-2018, 07:50 AM
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Red face

I always used Moly grease to prime the oil pump

Because I never knew just how long the engine would sit till it was installed and started .

Easily Months like all summer
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Old 08-17-2018, 04:31 PM
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Packing

Packing means just that, packed! Typically till it's running out any openings involved in the flow.

The thicker it is (petroleum jelly, moly lube) the better it will stay where you put it and not wind up in the gasket nor flow out down the pickup tube.


The pump is self priming. It has to refill the pickup tube (prime) every coldstart pretty much, but that said it can't hurt to pack it or prelube it unless you get it all over and it won't seal.

Regardless you typically want to protect it from corrosion due to air moisture.. Maybe something comes up and you don't wind up turning it over as soon as you think, unexpected thinks happen all the time.
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