Question about 1985 Pontiac Bonneville

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How do I prime the oil pump on a 1985 Pontiac Bonneville?

My 1985 Pontiac Bonneville w/ 3.8L V6 will not start. The neighbor's mechanic feels that the external oil pump has lost it's prime. He suggested dropping the pump, cleaning, packing with grease, and remounting. Is all this necessary? And how exactly would this prevent the engine from starting? Is there a safety device interrupting the ignition circuit?

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  • Dave  C
    Dave C May 11, 2010

    Pulling the pump would be a complete waste of time. Check for spark fuel and compression first. Find out which one is missing and go from there. Stay away from you neighbor's mechanic!


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  • 69 Answers

It is quite possible. Most cars will have a low oil level/pressure safety switch that will not allow the car to start. As far as rebuilding the pump, the necessity only depends on your budget. It may be cheaper to rebuild it, or buy a rebuilt unit. If you do choose to rebuild it, I would definitely invest in a Haynes, or Chilton's book for your car.

Posted on May 27, 2009

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For the 1989 Pontiac Bonneville 3.8L V6:

Firing Order:


Ignition Connections:
o <---6
o <---3
o <---2
o <---5
o <---4
o <---1


Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at!

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