Bad head gasket on C15

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by petefan4000, Dec 2, 2020.

  1. petefan4000

    petefan4000 Bobtail Member

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    So I just got interested in trucks and Diesel engines recently, and I came across this guy's channel. In the video I linked above he shows a C15 engine that kept overheating, and the driver thought that he had a bad water pump but the pump was actually good. After doing some digging they found that the driver was getting air bubbles in his cooling system due to a bad head gasket.

    At 4:38 he shows the gasket. He mentions how there's a dark circle on the inside edge of his fire rings. My question is what exactly is this darkening, and what is it caused by? Part of me wants to say that it's discolouration due to heat distortion, and when he zooms in on the gasket (at 4:50) it almost looks like the fire rings are bent excessively or something.
     
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  3. AModelCat

    AModelCat Road Train Member

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    Looks like soot.
     
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  4. A5¢

    A5¢ Medium Load Member

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    Go to Josh's channel, adept ape and ask him. He is busy, but he has always answered my questions.
     
  5. petefan4000

    petefan4000 Bobtail Member

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    I did, and I'm waiting for him to respond, that's why I asked.
     
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