Pink Coolant leak 2001.5 Passat V6

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  1. #1
    Neutral
    Join Date
    May 2003
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    North Andover, MA
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    58

    Pink Coolant leak 2001.5 Passat V6

    Hello all,

    Our 4M Passat with 90K miles started leaking coolant right after doing the 80K miles maintenance (at 87K). I took it to my favorite mechanic and he couldn't find a leak anywhere. But in the morning when I back up the car I see about a half a cup of coolant under the front of the car.

    Could it be a water pump that is giving up? If so, how much would a replacement cost including labor?

    thx,
    Mohmd.

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  3. #2
    4th Gear
    Join Date
    Nov 2005
    Location
    Arizona
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    3,559
    Take your belly pan off and look at the belly pan and the car from underneath. You should be able to see where the coolant is coming from, i.e. leaking from the radiator area, hose connections, down the block from the water pump, down a hose etc. There should be tell tale signs somewhere if you are losing 1/2 cup each day.

  4. #3
    nm+
    nm+ is offline
    5th Gear
    Join Date
    Jan 2006
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    Minneapolis
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    5,404
    Quote Originally Posted by kenblasko View Post
    Take your belly pan off and look at the belly pan and the car from underneath. You should be able to see where the coolant is coming from, i.e. leaking from the radiator area, hose connections, down the block from the water pump, down a hose etc. There should be tell tale signs somewhere if you are losing 1/2 cup each day.
    Note that G12 dries whiteish.
    There should be a trail.
    /Also, this should be in B5

  5. #4
    Neutral
    Join Date
    Dec 2006
    Location
    Sacramento CA, from Monterey
    Posts
    12

    Secondary Coolant Pump

    Same problem happened to my '93 EuroVan but at 160,000 miles. Pressure testing etc did not find it.

    A secondary electrical coolant pump comes on AFTER you turn the engine off if the coolant temp goes up as the car sits in the drive way. You come out in the morning and there is a puddle. It does not leak while driving because the main belt driven water pump is circulating the coolant. So you've parked the car, the engine starts to cook off and heat up. The inline electrical secondary pump kicks in and cools down the engine, and leaks only while it is running, which is when the car is parked.

    It is rare enough to not be readily diagnosed and I've got an excellent shop I go to. Check if the engine has a secondary coolant pump, if it is leaking around its seal, that should be it. Look for tell-tale residue.

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