At 12:05 AM 7/11/2010 Sunday, mark drillock wrote:
>Prior to mid 87 the hoses for the end vents come off the heater box
>right near the opening that faces the front grill. There is no provision
>for any adjustment of the air flow to those hoses. Whatever pressure the
>forward motion of the van puts into the heater box opening is all that
>is available to come out of those vents. This would only be outside air
>temp air.

Dear Mark,

Beg to disagree about the fan.  On both my '84 and '85 the fan drove
the dash vents very well, just no temperature control.  I liked it that way.

Now on my '89 the vents are temp-controlled which I don't wish, and
have less output as well, presumably from having taken a trip through
the heater core (which may be plugged up, have to look).  If there is
a way for me to change my present system back to the old one, I will take it.

Yours,
David