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08 780 d13 weird water pump leak

Discussion in 'Volvo Forum' started by cainekh, Apr 23, 2015.

  1. Apr 23, 2015 #1
    cainekh

    cainekh Bobtail Member

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    Nov 23, 2012
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    We replaced the gasket inside the water pump housing and replaced the gasket on the water pump itself, poured a few gallons in the engine and saw a steady dribble out of a hole in the right side of the water pump, at the edge of the block closest to the coolant filter. (pic attached)

    WP_20150423_20_23_43_Pro.jpg
    The hole in question is dead center in this pic - that's the end of the water pump. The pulley with the small rust spots is the water pump pulley.

    What uh... what would cause water to come out of this hole?
     
    cainekh, Apr 23, 2015
    cainekh, Apr 23, 2015
    #1
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  3. Apr 23, 2015 #2
    boneebone

    boneebone Road Train Member

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    The Water Pump itself is leaking, you should've put a new Water Pump on when you replaced the gaskets.
     
    boneebone, Apr 23, 2015
    boneebone, Apr 23, 2015
    #2
  4. Apr 23, 2015 #3
    cainekh

    cainekh Bobtail Member

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    Nov 23, 2012
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    It wasn't leaking from there before, and the engine hasn't been run since it was removed and replaced - what's the purpose of that hole?
     
    cainekh, Apr 23, 2015
    cainekh, Apr 23, 2015
    #3
  5. Apr 23, 2015 #4
    boneebone

    boneebone Road Train Member

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    It's called a Weep Hole, it's to let contaminants and fluid drain so it doesn't affect the integrity of the Seal and Bearing. Once it starts leaking it means your Bearing Seal is compromised and you will have impending Bearing failure.

    It's always cheap insurance if you're replacing any Water Pump Seals or have to remove the Water Pump (on a car or a truck to do any type of engine work), to replace the Water Pump with a new one, (especially if the Water Pump that is installed is the original one with a lot of miles on it).

    Now you're going to have to do the labor twice.
     
    boneebone, Apr 23, 2015
    boneebone, Apr 23, 2015
    #4
    KB3MMX and cainekh Thank this.
  7. Apr 23, 2015 #5
    cainekh

    cainekh Bobtail Member

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    Nov 23, 2012
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    Thanks for that info, sounds pretty smart. Is this the kind of thing that maybe isn't surprising with a take-off bolt-back-on situation? No weeping, took it off, bolted it back on, weeping now. Maybe not unheard of?

    And could the coolant filter shut off valve have anything to do with this? We had some problems turning that and the owner said he heard like a vacuum release the first time he did get it to turn (only 1/3 of the way, from 12 to 1 oclock when 12-3 is the full range of motion), and he's suspicious that it's related maybe.
     
    cainekh, Apr 23, 2015
    cainekh, Apr 23, 2015
    #5
  8. Apr 23, 2015 #6
    boneebone

    boneebone Road Train Member

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    Anything is possible with anything mechanical and man made. It's Murphy's Law, once you fix something on a vehicle, something else always breaks afterwards.

    It could have started leaking from the added pressure of the fixed gasket leak and turning on the Coolant Valve back on.

    How many miles are on the engine?

    Also the DEF/EGR trucks are hard on all engine components because of the higher coolant operating temperature and higher exhaust and turbo temperatures.

    Good luck.
     
    boneebone, Apr 23, 2015
    boneebone, Apr 23, 2015
    #6
  9. Apr 25, 2015 #7
    KB3MMX

    KB3MMX Road Train Member

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    Just replaced mine because of the exact same problem. I think the pump was around $300, not too terrible.
    Also a good idea to put a fresh tensioner on with a water pump, pretty much on any engine.
    Good luck
     
    KB3MMX, Apr 25, 2015
    KB3MMX, Apr 25, 2015
    #7
  10. Dec 5, 2015 #8
    Claudio Hysi

    Claudio Hysi Bobtail Member

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    Nov 12, 2015
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    Sorry for the late random,i would love to know how many hour job the water pump change was and an approx total cost!
     
    Claudio Hysi, Dec 5, 2015
    Claudio Hysi, Dec 5, 2015
    #8
  11. Dec 14, 2016 #9
    bonous

    bonous Light Load Member

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    May 31, 2014
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    What is the full open position for the coolant filter shut-off valve?
    Is it 3 O'clock?
     
    bonous, Dec 14, 2016
    bonous, Dec 14, 2016
    #9
  12. Jan 20, 2017 #10
    ryanbob1

    ryanbob1 Light Load Member

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    Sep 9, 2016
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    it called a tell, or telltale because you know when you may be looking at a new one
     
    ryanbob1, Jan 20, 2017
    ryanbob1, Jan 20, 2017
    #10
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