'96 3.5L Water Pump/Engine Front Housing

Discussion in 'General Motoring' started by Bob Shuman, Sep 15, 2003.

  1. Bob Shuman

    Bob Shuman Guest

    Spent yesterday replacing my water pump, tensioner, idler, timing belt, and
    radiator hoses on a 1996 Eagle Vision TSI (3.5L V6, 57K miles). Everything
    went back together pretty well and I tested for no leaks by filling with
    water. Since everything looked good, I filled with antifreeze and drove
    today. Unfortunately, I discovered that I had a small sporadic leak coming
    from the pump area.

    I disassembled everything this morning and ran the engine with the timing
    cover, fans, and serpentine belt removes to see what was happening. I
    discovered that the leak was coming from the area directly behind the water
    pump. I'm not exactly sure what this housing is called, but I will call it
    the water pump/engine front housing. This then required removal of the
    passenger side cam sprocket and some other bolts to get this fairly large
    housing off. When I had it off, I verified that there was corrosion on both
    the engine block front and the alloy housing verifying this had been leaking
    for some time. There were a couple of small flat round rubber gaskets on
    either side of the pump orifice which had yet another larger round gasket.

    I cleaned everything up pretty well and intend to pick up the gaskets at the
    dealer parts counter tomorrow. I have two questions:

    1. Should I also use RTV to hold the gaskets in place and improve the seal
    when I replace these 3 housing gaskets? (Seems to me that a thin coating of
    blue RTV might help to fill in some of the small pits that I was not able
    to wire brush out.)

    2. Can someone who has the FSM provide me with the bolt torque requirements
    for re-assembly? There are several size bolt heads (10mm, 13mm, 15mm, 18mm
    cam sprocket).

    Thanks in advance for your thoughts and information. It appears that the
    pump itself was not the source of this leak as I had presumed (but I will
    replace the pump anyway).


    Bob Shuman, Sep 15, 2003
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