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Thread: Rad Upgrade

  1. #1
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    Rad Upgrade

    Through some recent events, I have acquired a four core aluminum rad custom made for a Chrysler Intrepid with dual 12" electric fans. I have been pondering about installing it for some time now but haven"t due to some serious modifications that would be need to be made to the grill to accommodate it.

    Today, I finally bit the bullet, and committed to the swap. The original radiator is 16x24x1 1/4. The donor rad is much wider at 15 3/4x29x2 1/4.
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  2. #2
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    I marked where the grill had to be cut and went at it with a cutting wheel on 4 1/2" grinder. Its crude but works well.
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  3. #3
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    I plumbed the new rad in with some new hoses spliced together for a temporary fit and mounted the remote reservoir and fill on the passenger side fender splicing into the heater core hoses.
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  4. #4
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    I welded in a piece of 3/4 x 3/4 stainless that I had laying around across the top of the grill for a mounting point at the top of the radiator. I fastened the lower section of the rad with two 3/8" bolts into either side of the grill and fenders.

    I already had a 10" electric fan installed with the previous rad, so I just wired into the existing relay.

    I then bled the system, pressurized and checked for leaks.

    Now for a test drive
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  5. #5
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    looks good!
    WHAT WOULD MACGYVER DO?

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  6. #6
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    Thanks Tony. Turned out okay for an afternoons worth of work.

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    looks realy good

    if you find it running a bit hot still or the fan is on too much, hit up the wreckers for a smaller water pump pulley yours is hugemungus
    a smaller pully will speed up the pump

  8. #8
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    Two items of oversight. 1) The upper rad hose sits higher than the radiator
    2) The reservoir/fill sits lower than the radiator

    Both of these items make it difficult and damn near impossible to get all of the air out of the system.

    My two possible solutions; 1) Raise the reservoir and mount it to the grill support rod.
    2) Locate or fabricate and install a remote fill in the upper rad hose.

  9. #9
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    Simple. Done this on an old car.

    Get a rad flush setup. Mount the adaptor on you heater core hose, but make sure there is enout lenght to lift it high above all. The hook up a hose and fill.
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  10. #10
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    The factory Toyota Celica mounts the reservoir below the filler neck, but instructs the technician to lift it higher during the final bleeding. Once all the air is out, you can draw and expel into a reservoir that's below the cap.

    Good catch though. I missed it . And JK's idea would work too.
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