I did a similar job then ran into a really slow coolant loss.
Turned out to be a really slow leak at coolant level sensor in coolant
bottle with blue cap and at the rear heater valve O ring. The latter was
the bigger culprit ; I didn't notice a coolant smell until that O ring
failed in an epic way (allowed a lot of coolant out.). Prior to
that, coolant must have been dripping out and hiding under the floor. I did
not smell it.

One thing I was advised to do, and wish I had done  (still don't not have
the tool yet).
Use a pressure tester to check for leaks.

Neil.

On Tuesday, September 8, 2015, Roy Nicholl <RNicholl@nbnet.nb.ca> wrote:

> All,
>
> A couple of weeks ago, I replaced the water pump in the Hyena ('88 Westy
> WBX).  .........
>
> Any ideas on where I should explore next?
>
> I have also noted that my temperature gauge is now running a little lower
> (from top half to bottom half of LED ... about a needles width).   I plan
> to open both heater cores wide (they are partially shutdown at the moment),
> park with the nose in the air, run it for a few moments, then open then
> bleed the system again just to ensure I do not have an air bubble.
>
> Roy
>

--
Neil n

Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>

1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>

1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/>

Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>