C-15 Acert. 475 hp.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BRD TRANSPORT, Dec 10, 2023.

  1. BRD TRANSPORT

    BRD TRANSPORT Light Load Member

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    Jul 6, 2018
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    Oil cooler leaking fresh coolant at front of oil cooler.
    Bad back can't get under truck right now .
    Could it be just a gasket or somthing more.
    C-15 Acert 475.
    Any help would be appreciated.
     
    Oxbow Thanks this.
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  3. Goodysnap

    Goodysnap Road Train Member

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    The big orange o rings on the front and rear of the oil cooler are notorious for cold leaks with age. They will usually stop leaking once the engine is warm. New o rings and gaskets should do the trick.
     
    Last Call, W923, Stay Puft and 2 others Thank this.
  4. MM71

    MM71 Heavy Load Member

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    if you have it apart ... might as well replace the cooler. Go with aftermarket. The cat cooler is held together by epoxy and made in china. It degrades over time. Aftermarket it still made in china, but is soldered .... and used to be a quarter of the cost. I would use a cat o ring kit though.
     
    W923 Thanks this.
  5. BRD TRANSPORT

    BRD TRANSPORT Light Load Member

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    Good to know thanks.
     
  6. W923

    W923 Heavy Load Member

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    Are you saying current production cat ones are epoxyed because I really don’t think the original cat ones were?
     
    Last Call Thanks this.
  7. MM71

    MM71 Heavy Load Member

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    Yes, and as far as I know they have always been.
     
  8. MM71

    MM71 Heavy Load Member

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    Just checked the prices, .... insanity, last time I bought a cooler 2 years ago it was 359.87 for a mcbee on account with peterbilt (aftermarket they are all the same pai, mcbee, etc ... same chinese mfg rebranded) and 31.74 for the cat seal kit. Twice the price in 2 years, the times we live in are truly grand.

    OP ... maybe keep the old one and just re seal it
     
  9. BRD TRANSPORT

    BRD TRANSPORT Light Load Member

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    Turned out to be that rubber gasket ,took it to a local shop United Diesel SLC Utah ,do great work.he said he has not had any problems with the aftermarket coolers vs Cat he really can't say.
     
    MM71 and W923 Thank this.
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