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Cat c15 Sdp rebuild help

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by dustinbrock, Jun 8, 2018.

Page 7 of 10
  1. Jun 25, 2018 #61
    swaan

    swaan Road Train Member

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    That or you ran it with coolant in the oil for a while.......

    Coolant will take out the bearings like that. Flake the Babbitt right off .
     
    swaan, Jun 25, 2018
    swaan, Jun 25, 2018
    #61
    Oxbow, SAR, spsauerland and 1 other person Thank this.
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  3. Jun 25, 2018 #62
    dustinbrock

    dustinbrock Road Train Member

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    I don't think there was coolant in the oil, seemed combustion was getting in via a blown seal at the very top of a sleeve, no coolant was going into my pistons or oil that I'm aware of.
     
    dustinbrock, Jun 25, 2018
    dustinbrock, Jun 25, 2018
    #62
    Oxbow and SAR Thank this.
  4. Jun 25, 2018 #63
    spsauerland

    spsauerland Road Train Member

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    Totally agreed and will take the cross hatch right out of the liners.
     
    spsauerland, Jun 25, 2018
    spsauerland, Jun 25, 2018
    #63
    Oxbow, SAR, dustinbrock and 1 other person Thank this.
  5. Jun 25, 2018 #64
    swaan

    swaan Road Train Member

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    It was pressurizing your cooling system like a coffee perk and you ran it like that for months. No reason coolant cant go into the cylinder after you shut truck off.
    You dont need much coolant in the oil to take out the bearings over time. Run it long enough and you'll spin one .
     
    swaan, Jun 25, 2018
    swaan, Jun 25, 2018
    #64
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  7. Jun 25, 2018 #65
    dustinbrock

    dustinbrock Road Train Member

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    20180625_163342.jpg it was this top seal that blew, combustion was entering was seeping between the top of the liner and the head gasket and entering via the flange area.... after shutting down the motor, I don't see how coolant could defy gravity and travel upwards into the cylinder chamber? The bottom o rings were all intact, this explains why the combustion gas tests I did failed.

    I guess if the head gasket was blown, maybe it took out a water jacket also which could have let coolant in.

    I hope that's the issue, would be a easier fix... I'll just have to measure everything real good when putting it back together to be sure.
     
    dustinbrock, Jun 25, 2018
    dustinbrock, Jun 25, 2018
    #65
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  8. Jun 25, 2018 #66
    swaan

    swaan Road Train Member

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    When you shut the engine off the pressure in cooling system is at cap spec, 16psi?? You dont think coolant wont go back into where the combustion gas got out???? Yours was really blown good too.
     
    swaan, Jun 25, 2018
    swaan, Jun 25, 2018
    #66
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  9. Jun 25, 2018 #67
    spsauerland

    spsauerland Road Train Member

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    The pressurized cooling system would push coolant after you shut the engine off is what I think @swaan was referring to.
     
    spsauerland, Jun 25, 2018
    spsauerland, Jun 25, 2018
    #67
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  10. Jun 25, 2018 #68
    dustinbrock

    dustinbrock Road Train Member

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    You make a good point swaan... Yeah it was blown to smitherines. I was honestly expecting more damage than I have found from pushing it as far as I did but for me... It made alot of sense to risk it.
     
    dustinbrock, Jun 25, 2018
    dustinbrock, Jun 25, 2018
    #68
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  11. Jun 25, 2018 #69
    Goodysnap

    Goodysnap Road Train Member

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    The more you show, this is looking like a awful good candidate for a complete engine. My fear would be the crank is fatigued and would break soon, like we have all seen a time or two.
     
    Goodysnap, Jun 25, 2018
    Goodysnap, Jun 25, 2018
    #69
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  12. Jun 25, 2018 #70
    Cat sdp

    Cat sdp . .

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    My cam.......

    87885C35-4045-4FA8-B61A-09B8EA15A38E.jpeg CD4947AF-38D0-4F5B-86A0-B24E8D1F0AF8.jpeg AB77AD87-B708-4F12-95DD-2A1DE1182C64.jpeg

    Has 610k miles and 21k hours on it now. We did the cam and the rocker.....about a year ago

    3 injectors one at a time and a couple of water pumps and a air compressor......not 2 bad for a sdp....:)
     
    Cat sdp, Jun 25, 2018
    Cat sdp, Jun 25, 2018
    #70
    Oxbow and dustinbrock Thank this.
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