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Technical GM oil filter adaptor question

Discussion in 'The Hokey Ass Message Board' started by 1941coupe, Jul 4, 2020.

  1. 1941coupe
    Joined: Jul 4, 2010
    Posts: 397


    im thinking of changing my old canister oil filter to a modern spin on filter using this kit ,engine isa 50 olds 303 any pros or cons appreciated

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  2. saltflats
    Joined: Aug 14, 2007
    Posts: 10,085

    from Missouri

    Cons, it will now have two places for a leak.
  3. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,227


    I can only think of cons.
  4. speedshifter
    Joined: Mar 3, 2008
    Posts: 192


    If my old memory is correct the canister housing is aluminum and contains a pressure relief spring and ball. It is designed so if the cartridge filter is restricting oil flow due to sludge the ball will lift off it's seat and let the oil flow bypass the filter. The ball would hammer out the seat, letting the oil bypass the filter all the time. Maybe one cause of the notorious noisy hyd lifters. Greg
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  5. 302GMC
    Joined: Dec 15, 2005
    Posts: 6,146

    from Idaho

    Spin-on has roughly 1/3 the filtering area of the canister.
  6. Mr48chev
    Joined: Dec 28, 2007
    Posts: 26,917


    You also have to make sure you reuse the check valve for the canister in most cases. I pulled the adapter that was leaking off an engine in a car I bought with it on and they had left the check valve off when they bolted the adapter on. Not only did it crack the adapter it was bypassing the filter the whole time.
  7. If memory serves me right the OLDS 394 filter adapter will work on the earlier blocks. Perhaps @Paul can confirm this.

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