Priming turbo

[SpoolN]

I have a 95 gsx and Im just finishing up the turbo install with a ported evo 16g and I was wondering how to prime the turbo. I think it is the mpi fuse that i have to pull then go and start the car right. But i cant find that fuse anywhere on my car it isnt near my batery. Also is castrol gtx high horespower 10w-30 oil ok for the car.

 

['98 AWD DSM]

Pull out the motor fuse and then crank it a few times for a couple of seconds. Its the fuse under the hood, and I think it is blueish. Just look on the cover of the fuse box it says motor fuse.

 

[ohio98eclipse]

hrmm i just unplugged a spark plug wire

 

[Tnj4life]

Just wondering cause I don't know, but why do you have to prime a new turbo?

 

[Jebus[tuning]]

Just wondering cause I don't know, but why do you have to prime a new turbo?

To get fresh oil into the return lines considering there is none on a fresh install.

 

[Tnj4life]

To get fresh oil into the return lines considering there is none on a fresh install.

Thanks for the info.

 

[JoeWagon]

hrmm i just unplugged a spark plug wire

So you pumped a shitload of fuel through your engine? No thanks, I'll get rid of the FI fuse. I'm surprised it didn't backfire on you.

 

[ohio98eclipse]

only cranked it for a second it was a used turbo so i wasnt to worried

 

[sonicnofadz]

ummmm I have no idea why you would need to "prime" the turbo. When you crank over the engine and start the car, the turbine blades will NOT spin. Once the car is started and is at idle, the oil pump will create pressure and oil will flow through the turbo. So whats the difference between pulling the mpi fuse and just starting the car as normal? Either way the turbo won't be boosting anyway so it really doesn't matter.

 

[doodie]

Its the fuse under the hood that says "Engine Moteur"

 

[out there]

i can't imagine that there would be anything wrong with starting the car as normal, it's just like when the car sits after running... almost all the oil drains out
but i've never installed a new turbo, so what do i know?

 

[mhuffman]

the turbo certainly does spin at idle.

 

[Splitpi]

Just disconnect the crank angle sensor. This kills the injectors and spark. It'll throw a code afterwords, so y'll have to reset the ECU though. It near the top of the engine, by the timing belt cover.

 

[mattdev]

the turbo certainly does spin at idle.

And the oil does not drain out of your lines after you shut off. This is why you have a turbo timer, so you don't scorch the hot oil in the feed lines. The drain line goes to the bottom of your oil pain (which hopefully has a lot more oil in it than your oil lines), therefore it does not drain the oil lines since the pressure at the bottom of the oil pan is greater than the pressure in the lines. (It needs a pump to circulate).

And you prime the turbo simply to fill the new, empty oil lines. This prevents your "turbo" from rotating w/o any lubrication. (since it IS spinning (at fairly high speeds) whenever exhaust gas is flowing)).

 

[Cs4g63]

Holy hell. This is from 04. WTF

Still good information though.

 

[propeine]

And the oil does not drain out of your lines after you shut off. This is why you have a turbo timer, so you don't scorch the hot oil in the feed lines. The drain line goes to the bottom of your oil pain (which hopefully has a lot more oil in it than your oil lines), therefore it does not drain the oil lines since the pressure at the bottom of the oil pan is greater than the pressure in the lines. (It needs a pump to circulate).

And you prime the turbo simply to fill the new, empty oil lines. This prevents your "turbo" from rotating w/o any lubrication. (since it IS spinning (at fairly high speeds) whenever exhaust gas is flowing)).

That return line is empty. If you suck water up through a straw from a large pan and then take your mouth off of it, the water goes right back down to the level in the pan. Same concept. Although I agree with a turbo being primed and your reason for the turbo timer. All you really have to do to prime a turbo is pour oil into the feed on the turbo. It will all drain out but gives enough lubrication for the shaft until fresh oil comes from the motor.

Same concept as priming the motor on a fresh rebuild. You have assembly lube on it and then prime the motor to get a coating of oil on all the moving parts. It still drains back to the pan every time you shut off the car.

 

[mattdev]

It's difficult to tell, but all it would do is equalize the pressure (pressure at bottom of oil pan, and the pressure in the lines).

Like you said, it's like a straw, but when you put the straw to the bottom (where the pressure is) it equalizes by filling the straw w/ soda. (preferably Dr. Pepper) Again, who knows how much pressure is in the lines vs the bottom of the oil pan, it's all guesswork from here on out... I know that when taking off my old oil lines, oil still flowed out of them... I'm just theorizing why, but I know it's there.