Trucks in the shop. Disappearing coolant

Discussion in 'General Discussion' started by MDA, Nov 15, 2012.

Car Parts
  1. MDA

    MDA Full Access Member

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    Last month she was way low on coolant and tried to over heat. Took her to shop for a block test. Checked good. They could not find a leak anywhere. Now she is back in the shop for the same thing. Again no leaks. No coolant out the exhaust. None in the oil. Where is it going? Any ideas?
     
  2. ARRESTmeRed04

    ARRESTmeRed04 Active Member Supporting Member

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    I'm guessing the pressure checked the entire cooling system? I've seen radiators leak only under pressure so the leak going down the road but not with the truck shut off
     
  3. MDA

    MDA Full Access Member

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    My bad. Pressure test was done as well.
     
  4. ARRESTmeRed04

    ARRESTmeRed04 Active Member Supporting Member

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    Tried just replacing the radiator cap?
     
  5. MDA

    MDA Full Access Member

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    Haven't tried but no signs of leaking.
     
  6. ARRESTmeRed04

    ARRESTmeRed04 Active Member Supporting Member

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    I'd start with a cap
     
  7. yellowfever#154

    yellowfever#154 Full Access Member

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    What are the pressure test results, that will basically explain everything.
     
  8. SlvrSnake

    SlvrSnake Full Access Member

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    If the cap is bad it may be boiling over and blowing out of the overflow causing you to be missing coolant. Is your overflow resevoir filled to the max. If there are no leaks it is really the only thing that makes any sense. The coolant has to go somewhere.
     
  9. Slitherbeast

    Slitherbeast Well-Known Member Supporting Member

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    The coolant could be going into the coolant overflow bottle but a crack it the hose or a bad cap may allow air to be sucked in instead of coolant during cooldown. leaving the rad low eventually .
     
  10. MDA

    MDA Full Access Member

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    Got the truck back today. They could not find a leak anywhere. No charge. I'm going to get a new cap and see how we'll that does.