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I have a 1999 vw Passat v6 2.8L 5v and its not holding coolant. As fast as I dump it in it drains right out. I dont think it could be a freeze plug because the car is off and the thermostat is closed. So its not getting into the motor. I think its a hose but cant see where its leaking from at all. From under the car or under the hood. But it pours out. Anyone have any ideas?

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  • Cars & Trucks Master
  • 5,341 Answers

Possibly a hose or a freeze plug. Yes, the coolant will go into the engine when it is off and the thermostat closed. As you fill the radiator, coolant will go into the engine through the bottom radiator hose. Keep looking-save your coolant and use water till you find where it is leaking. Stick a garden hose into the radiator, turn it on low, then you can see or feel where the leak is.

Posted on Dec 06, 2014

  • Anthony
    Anthony Dec 06, 2014

    Thank you I really appreciate the help. Hopefully I can find out what it is. The hoses are just really hard to get to. I will look at it and try to find the leak again today and let you know what I find. Thank you again

  • montehammons Dec 06, 2014

    Yes, I can imagine very little room to look or get around in. Plus you need to know or learn where all the possible places are that large leaks like yours may occur. Hopefully it is just a hose. The freeze plugs seldom fail, most often only from seriously neglected maintenance-allowing rust in the coolant to eat them away. Good luck .

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