Entity Loren A. Busch spoke thus:

>  The insulation on the 'hot' cooling
> line going forward from the engine to the radiator (and front heater)
This is a diesel, the heater hose is separate from the steel tubes to and
from the radiator. When the heater valve is off there is no coolant moving
through it. I don't know what the configuration is in Waterboxes but if you
feel that driving in summer with the heater on keeps your motor cool, be my
guest.

> I think you have some
> kind of a problem with the heater valve itself, or restricted flow
> through the heater core.
At 7,200 feet the air here is 30% thinner than sea level with a resulting
decrease in power. Since heat is a by-product of power, well you get the
ideer.

Hope that makes sense . . .

-- Rachel
http://www.Spectrumology.com
AIM Gnarlodious