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How to prime the oil in a 6.2

Discussion in '1982-Present GM Diesel' started by cegusman, Jan 31, 2005.

  1. cegusman

    cegusman 3/4 ton status

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    Need help on primming the oil on the 6.2. Mine has been sitting for a while with no oil cooler/radiator hooked up. Would like to fill the oil cooler with oil before I start it up. What is the easest way to do this?
     
  2. AgDieseler

    AgDieseler Certified Scrap Producer Premium Member GMOTM Winner

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    As long as there is oil in the crankcase, you can prime the system by just turning over the engine with the injection pump solenoid de-energized. Pull the pink wire on your pump so that when you turn the key the engine won't fire.

    Oil is pumped from the crankcase to the filter to the mains and so on. The important parts get oil first, so you shouldn't starve them by priming the system with the starter. Just do a little at a time - 5 seconds or so - and check the oil level in between.

    If you really want to get fancy, pull the vacuum pump and turn the oil pump with a long 1/4" extension attached to your favorite drill or air ratchet.
     
  3. cegusman

    cegusman 3/4 ton status

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    Thanks, Just what I needed.;)
     
  4. imiceman44

    imiceman44 1 ton status

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    So the pump shaft is a 1/4 inch square?
    I was going to ask the same question, thanks for the info.
    :D
     
  5. AgDieseler

    AgDieseler Certified Scrap Producer Premium Member GMOTM Winner

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    That's if I remember correctly, which may not be the case. I'm about 90% sure at this point.:blush:
     
  6. dieselponyexpress

    dieselponyexpress 1/2 ton status

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    I looked at my spare pump a few minutes ago:

    With my 8mm Allen key I had a perfect fit in the square hole at bottom of the pump.

    Regards,
    Walter
     
  7. 6.2 man

    6.2 man 1/2 ton status Premium Member

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    I would pull the glow plugs so it would turn over faster and not put any pressure on those parts . Just my 2 cents
     

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