Could be the PO used the Bars Heavy duty stop leak. If you flush your system out you might find a few leaks around the heads of water pump or both. Might need some more Bars Heavy Duty or what ever others on the board recommend. My 1.9 has 205K mi on it and that stuff is still doing the trick. Been using it for the last 6 years, along with the no phosphate antifreeze.
  Good Luck
  Steven

Gerald Masar <azsun99@EARTHLINK.NET> wrote:
  Is there an off-the-FLAPS-shelf recommended product, or just lots of water?

I am finally getting around to long overdue maintenance on my backup van ('88 Westy
AT)
after having owned it 2.5 years, and what came out was pretty dark, with some sediment
in the bottom of the buckets used to catch it. Also a thin slimy coating inside the
expansion tank, but nothing such as smell or oily sheen that might indicate internal
problems.
I will be replacing the expansion tank, cap, sensors, T-stat and some small hoses.
Thanks,
Jerry

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