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Water pump or head gasket?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by ajmb, Jun 25, 2012.

Page 1 of 3
  1. Jun 25, 2012 #1
    ajmb

    ajmb Bobtail Member

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    My husband has me asking a question since he is on the road.

    My husband was recently talking to you, and he just had the PDI stage 1 done by Joe on his peterbilt 379 Cat C 15 BXS. On the first trip he was blown away by how everything worked.
    On this trip something has gone wrong.
    he took a load from Toronto heading for Vancouver through north Canada, it was tri axle liquid tanker. The water temp started to get really hot resting at 215 and overheating on any grade.
    The fan is on at all times, when he pulls over it will cool the rad off.
    There is no leak from the water pump,
    Coolant is not coming out the overflow, there is no visable signs of coolant anywhere but yet losing quarts of it.
    Made it Calgary and in the morning the engine locked, not sure but wonder if fluid could be on the pistons? My husband called Joe, and Joe said probably a thermostat, and cat and another shop and they all said cracked head or gasket.
    Checked rad and does not appear to be blocked.

    Any thoughts?
     
    Last edited: Jun 25, 2012
    ajmb, Jun 25, 2012
    ajmb, Jun 25, 2012
    #1
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  3. Jun 25, 2012 #2
    camaro68

    camaro68 Medium Load Member

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    Sounds more complicated than your first post. Find a good certified mechanic.
     
    camaro68, Jun 25, 2012
    camaro68, Jun 25, 2012
    #2
  4. Jun 27, 2012 #3
    gokiddogo

    gokiddogo Road Train Member

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    When he fires it up does it smoke white for a bit? More than normal I mean. I had that happen on a cat 6nz engine, it was failed gasket and cracked head. Cost the boss a lot to fix, but it would of meant a new engine if the problem wasn't taken care of right away. Get it into a good mechanic asap.
     
    gokiddogo, Jun 27, 2012
    gokiddogo, Jun 27, 2012
    #3
  5. Jun 27, 2012 #4
    dannythetrucker

    dannythetrucker Road Train Member

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    he probably already checked, but if not check the dipstick. if the oil looks grey or milky it could be the oil cooler. also, need to make sure there is no oil getting in the coolant as well if the coolant is looking funky there may be oil getting in.
     
    dannythetrucker, Jun 27, 2012
    dannythetrucker, Jun 27, 2012
    #4
  7. Jun 27, 2012 #5
    marmonman

    marmonman Road Train Member

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    If the engine is locked up it is a head gasket or cracked head or both . A bad thermostat wont lock it up nor will a bad water pump.
     
    marmonman, Jun 27, 2012
    marmonman, Jun 27, 2012
    #5
    Raiderfanatic Thanks this.
  8. Jun 28, 2012 #6
    ajmb

    ajmb Bobtail Member

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    Thanks, that's what we thought. It's at Cat now and they are looking at it today, looks like a cracked head will most likely do overhaul. Anyone know if that will mean the PDI tune will be gone after they do it?
     
    ajmb, Jun 28, 2012
    ajmb, Jun 28, 2012
    #6
  9. Jun 28, 2012 #7
    marmonman

    marmonman Road Train Member

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    the tune should stay unless they reflash the puter on it .
     
    marmonman, Jun 28, 2012
    marmonman, Jun 28, 2012
    #7
  10. Jun 28, 2012 #8
    Gasienica

    Gasienica Heavy Load Member

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    They have no reason to flash it no paremeters need to be changed if it buing rebuit to it's same specs. They only put new flash on if you pay for it. So just make sure they not paying for the new flash updated files from Cat v
     
    Gasienica, Jun 28, 2012
    Gasienica, Jun 28, 2012
    #8
  11. Jun 28, 2012 #9
    Old Man

    Old Man Road Train Member

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    Detroit will reflash the ECM with a lo NOX program without telling you, he needs to have a talk with Cat and make it clear that they only change hard parts, no touching the ECM. Your the one paying them, get what you want.
     
    Old Man, Jun 28, 2012
    Old Man, Jun 28, 2012
    #9
    Raiderfanatic Thanks this.
  12. Jun 28, 2012 #10
    Superhauler

    Superhauler TEACHER OF MEN

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    sounds like a head gasket failed and filled a cylinder up with water. hope he didnt run it until it locked up! if it wouldnt start after it was turned off. then it hydrolocked (cylinder filled with water.) when they do tear it down make sure they check the liner protrution is right .005 to .006 is ideal.
     
    Superhauler, Jun 28, 2012
    Superhauler, Jun 28, 2012
    #10
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