I should have mentioned that I replace the coolant every one to two
years so the corrosion inhibitors are always fairly fresh.

Mike

Mike Collum wrote:
> I've had my '84 7 passenger since '91 (16 years) and the first 8 were in
> Hawaii.  Leaving the rear heater valve shut off for long periods has not
> caused me any problems with the core.  It's the same one that was in it
> when I got it.  I did have to replace the O-ring at the valve several
> years ago but it had gotten hard so it was simply time for that one.
>
> Mike
> Houlton, Maine
> '84 7 pass
> '84 Westy
> '85 Westy