[200q20v] Found leaking coolant...but from where?
Phil & Judy Rose
pjrose at frontiernet.net
Wed Jan 24 01:12:03 EST 2001
At 9:47 PM -0500 1/23/01, Steve Bednarski wrote:
>I have recently begun to leak coolant from my 1991 200TQW. A small but
>discernible puddle of antifreeze is collecting on the block at the point
>where it joins the oil pan. The location is underneath the thermostat. All
>hoses and sensor connections seem dry.
>Could this be from the water pump? I hope not as I just had a mechanic
>replace the pump and timing belt less than a thousand miles ago.
>How do I confirm if it is a water pump leak? Do I unbolt the timing belt
>cover to check?
It's possible that your leak is from the "water flange"--a cast-iron
pipe that runs just below the intake manifold. It's the pipe into
which the multifunction thermoswitch and the turbo afterrun sensor
are plumbed. The leak that I (and others) have had is from the
gasket(s) between this pipe and the head--especially the
triangular-shape flange section. It oozes slowly and drips down onto
the oilpan flange.
I was about to replace those gaskets (I got 'em from Carlsen for a
few bucks) but then the leak just stopped when the coolant level
dropped about 1/8" below the "maximum" mark in the overflow
reservoir. My car seems happy with the coolant level there, so it's
easier to just forget the "leak". --especially since the Allen head
cap screws were not easy to loosen.
Phil Rose Rochester, NY
'91 200q mailto:pjrose at frontiernet.net
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