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bypassing a oil cooler

Discussion in 'The Garage' started by barneybasher1010, Apr 26, 2007.

  1. barneybasher1010

    barneybasher1010 1/2 ton status

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    How can I bypass a oil cooler on a 1991 350 block? Can I take the lines off and plug them? THANKS MIKE
     
  2. Jason4x4

    Jason4x4 1/2 ton status

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    you would need to take the block off that the oil cooler lines go to. The one the filter screw on to, then get a regular adapter for the oil filter.
     
  3. barneybasher1010

    barneybasher1010 1/2 ton status

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    Where could I get the adapter? What would it be called?
     
  4. Jason4x4

    Jason4x4 1/2 ton status

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  5. barneybasher1010

    barneybasher1010 1/2 ton status

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  6. Jason4x4

    Jason4x4 1/2 ton status

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    looks like it.
     
  7. ntsqd

    ntsqd 1/2 ton status

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    Most people want an engine oil cooler. Why do you want to remove it?
     
  8. u2slow

    u2slow 1/2 ton status

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    I've never had a 350 with an engine oil cooler... but on a 6.2L diesel, the lines come straight off the side of the block. Remove the lines and install NPT plugs.

    IMO oil coolers compromise reliability. A ruptured line really wrecks you day (and/or your engine :doah:), leaky lines are high maintenance, and they retain nearly a quart of dirty oil each oil change.
     
  9. Thunder

    Thunder 3/4 ton status

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    Hmmm strange......... I have never had a problem with my oil cooler on my 350. The lines are hard steel and thick hydraulic lines to the cooler. They have never leaked, been grabbed by brush, hit by rocks, or caused any problem. The oil cooler drains completely at each oil change. If anything, it adds to the longevity of your engine.

    If you need to bypass them. I suggest you either get the stock oil filter adapter or hook/loop them together. If you plug them your engine will be a little starved for oil and might make a little noise before it blows.
     
  10. barneybasher1010

    barneybasher1010 1/2 ton status

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    I am putting a 1991 motor in my 1979 blazer and my 79 does not have a cooler.
     
  11. 425 Xpedition

    425 Xpedition 1/2 ton status

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    My 89 Blazer has the NPT plugs screwed into the adapter. Apparently the cooler was leaking and the previous owner did not want to fix it the right way. I have owned it for two years now and no problems.
     
  12. Jason4x4

    Jason4x4 1/2 ton status

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    Just use the oil filter adapter that is on the engine in your 79 now.
     
  13. ntsqd

    ntsqd 1/2 ton status

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    I take it that you don't have the '91's cooler? I've no idea what was done in K5's, but my '79 3/4t Sub's SBC had the cooler.

    I could see in cold country one being of little help, but since ~1/3 of the total heat produced by an engine is dumped into the oil I think a cooler is a good idea for anywhere else. There are two reasons for changing engine oil, gunk & fuel that it's picked up and the destruction done to it's chemical structure by that engine heat.
     
  14. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Then go buy a cooler . Its a great thing to have . It may keep your oil in better shape between changes , reduce engine wear , and give you something to brag about .

    Just carry a piece of hose , and a couple plugs that fit the oil adapter ..... just in case .

    Actually EVERYONE who owns an old truck needs to carry enough stuff to make it home :laugh:
     

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