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Repack Oil Pump Gears

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TxR6guy

15+ Year Contributor
136
0
Dec 18, 2006
Haltom, Texas
Well iv'e had my new motor sit awhile and while getting the motor finally in the car i go to prime it and the "New" oil pump won't build pressure, the machine shop recommend that i repack the gears again, my question is do i need to loosen the belt's up or can i just drop the pan and the cover and repack it again leaving the belts on?
 
Look at this diagram of our oil supply systems.
If it were me, I'd jack my car up as high as possible under the passenger side front and rear.
***Edit*** Place jackstands under the car at the jacking points described in the service manual. ***Edit***
Remove the oil filter and pour oil into the oil filter housing in an attempt to back fill the oil pump.
Instead use a small hose and something like an clean French's Mustard bottle (just to paint a picture, there are many options, you're a dsm'er, you can figure it out).
Put oil in it, and slip a hose over the end and gently squeeze oil into the OFH and allow it to trickle back down to the oil pump.
It shouldn't take much.

I'd try this before I'd take off all your belts and tear the front case off.
 

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Well iv'e had my new motor sit awhile and while getting the motor finally in the car i go to prime it and the "New" oil pump won't build pressure, the machine shop recommend that i repack the gears again, my question is do i need to loosen the belt's up or can i just drop the pan and the cover and repack it again leaving the belts on?

How are you trying to build pressure? If your trying to crank the engine with the spark plugs out to build pressure you wont spin the pump fast enough to build any. What did you origially pack the pump with??
 
Did you use assembly lube when you or whoever assembled the engine? I would not worry about getting "Instant Oil Pressure" at the instant you crank over the engine. The assembly lube is more than enough to keep it protected till there is pressure.

Just start it up, then if you don't get pressure within the first 5-10 seconds shut it down!

Also, if you're trying to build pressure and you are basing that off of the stock gauge, just remember that it is very slow to react to pressure changes. I suggest getting a more accurate aftermarket gauge.
 
Did you use assembly lube when you or whoever assembled the engine? I would not worry about getting "Instant Oil Pressure" at the instant you crank over the engine. The assembly lube is more than enough to keep it protected till there is pressure.

Just start it up, then if you don't get pressure within the first 5-10 seconds shut it down!

Also, if you're trying to build pressure and you are basing that off of the stock gauge, just remember that it is very slow to react to pressure changes. I suggest getting a more accurate aftermarket gauge.
Today 07:59 AM

They used Assembly lube, motor sat for about 5mths now, we tried to start it up for cpl seconds and it wouldn't build pressure at all, im using a electronic Autometer gauge, no oil in the filter no oil in the head and oil cooler.

How are you trying to build pressure? If your trying to crank the engine with the spark plugs out to build pressure you wont spin the pump fast enough to build any. What did you origially pack the pump with??

Thats the way i was trying to build pressure was cranking the engine w/out plugs. ohh assembly lube is what they used.
 
I had a motor i built that wouldn't prime either.. I remove the brake boost fitting and screwed it into the oil filter housing. I hooked up a tranny pump (one that you use to install tranny fluid) and i pumped and pumped oil into it. finally the motor primed and was ready to start.
 
A new pump that has not been primed will take forever to begin to draw oil.

Always prime the pump and then spin it with a drill before installing the timing belt.

This will ensure that you have oil pressure as soon as possible and that oil is actually making it up into the head and to the turbo.

Take a few minutes and save yourself *potentially* hundreds of dollars in trashed parts.
 
I packed mine before assembly and it didn't prime when turning over the motor. And unfortunately I had to troubleshoot a no start and cranked the motor over for about a total of 2 min during the time it wouldn't start. The head didn't see any oil until about 5 seconds after it actually fired up for the first time.

I wouldn't take it all back apart. Just make sure you get pressure within the first 5-10 seconds or so like stated above.

Filling the oil filter is a good idea and using one of those hand pumps sounds good too if you want to be extra cautious.

As for the turbo, I have heard of people going as far as holding the turbo shaft nut on the compressor side so the turbo didn't spin until they had oil pressure.
 
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