How do you prime the oil pump? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-13-2006, 01:21 AM   #1
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Default How do you prime the oil pump?

How do you prime the oil pump on a 3800 supercharged GM engine with a crank driven oil pump? Reason: someone is selling a 94 white SSEI says the oil pump needs priming, selling the car for 1500 with new transmission, is it worth it?
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Old 06-13-2006, 01:33 AM   #2
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Default Re: How do you prime the oil pump?

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Originally Posted by LuxuriesPremier
How do you prime the oil pump on a 3800 supercharged GM engine with a crank driven oil pump? Reason: someone is selling a 94 white SSEI says the oil pump needs priming, selling the car for 1500 with new transmission, is it worth it?
Yes, it'* worth $1500, as long as the rest of the car is in decent shape.
As far as priming the crank driven pump, I'll have to check the FSM, which are at my parents yet. I'll grab them in the morning and let you know what it says, if no one else gets back to you before then.
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Old 06-13-2006, 02:03 AM   #3
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Default Re: How do you prime the oil pump?

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Originally Posted by OLBlueEyesBonne
Quote:
Originally Posted by LuxuriesPremier
How do you prime the oil pump on a 3800 supercharged GM engine with a crank driven oil pump? Reason: someone is selling a 94 white SSEI says the oil pump needs priming, selling the car for 1500 with new transmission, is it worth it?
Yes, it'* worth $1500, as long as the rest of the car is in decent shape.
As far as priming the crank driven pump, I'll have to check the FSM, which are at my parents yet. I'll grab them in the morning and let you know what it says, if no one else gets back to you before then.
Pack the gears of the oil pump with vaseline and fire it up.
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Old 06-13-2006, 09:07 AM   #4
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Default Re: How do you prime the oil pump?

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Originally Posted by Bob Dillon
Pack the gears of the oil pump with vaseline and fire it up.
That'* funny...Jay called me yesterday and I mentioned that same thing.

The pump is built into the timing cover.

Why does the pump need to be primed? Is this a new motor?
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Old 06-13-2006, 10:33 AM   #5
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If the motor is already together, how do you pack it?
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Old 06-13-2006, 11:07 AM   #6
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If the motor is together the questkon I'd wonder is why does it need to be primed and why is this a problem for the mechanic?

Every mechanic knows how to prime an oil pump.
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Old 06-13-2006, 01:20 PM   #7
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I have in the past pulled the timming cover from a 3800 and never had to reprimbe an oil pump... Put it all back together and hit the key and poof, 60psi right off the bat...


Now I am wondering the same tho, its a gyrator style oil pump, if you were to rebuild the oil pump it would need to be primbed with vasoline when reassembled...

Somehow I'm not trusting of this car or situation...

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Old 06-13-2006, 03:44 PM   #8
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Quote:
Originally Posted by jr's3800
Somehow I'm not trusting of this car or situation...
Exactly what I told Jay yesterday.

Things don't add up.
It'* a 94 at a shop w/a new transmission. Ok
It'* in need of the oil pump being primed......uh...why?

It makes no sense as to why unless there is major engine work that was done and if so, then the person that did it.....should have packed it with vasoline to ensure it was ready to go.
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Old 06-13-2006, 04:05 PM   #9
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I agree. I do not know about the vaseline, but the same idea applies when you do an oil change; all of the oil drains out of the system and tehre is very little; if any left in the pump. Same idea right?

No common sense to put a new trans w/ a questiuonable motor. do you have/can he provide paperwork for the new trans?
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Old 06-13-2006, 11:37 PM   #10
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Default Thanks for all the feedback

1. They have reciepts for everything that went into the car shocks struts tranny etc....
2. The person tried to explain me about some work that was done to the engine i forget exactly what said maybe a pulley or crank system, not sure really ill get more info
3. What happens if u start up a car with an unprimed oil pump but plenty of oil in the system?
Thanks Again
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