[V8] Cold Feet Update: System on "HI" Blower on "Low" air feels warm

[Jeremy Ward]

Robert,

This reminded me of a symptom I used to have with mine.  If I started
the car up and drive it a little, it was fine.  If I drive it for any
length of time (or put my foot into it) I would hear vacuum sounds, and
loose the vents in the dash.  If I then hit the 'low' button, I would
hear vacuum sounds again, and then I would hit 'auto' again and get my
dash vents back.

My culprit was the vacuum line at the back of the engine that goes to
the T (or is it a diaphragm valve...) on the fire wall and takes off as
a little vacuum line and disappears through the firewall near the heater
core...  Put a hose clamp on the T and it hasn't been a problem since
;-)

Don't know if this applies to your situation, but worth a look.

Cheers,

- Jeremy

-----Original Message-----
From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf
Of robert_a_dupree at bankone.com
Sent: Tuesday, January 25, 2005 7:39 AM
To: V8 at audifans.com
Subject: [V8] Cold Feet Update: System on "HI" Blower on "Low" air feels
warm

So at least for the short term I can make the cabin warm enough to stop 
teeth from chattering.
It seems that perhaps the valve isn't being controlled well, but is 
capable of being opened by the system.
When I cranked up the fan to "hi", the warmth of the air was decresed 
noticably.

I did notice that the replacement heater core had roughly 1/2 the number

of fins compared to the one I took out.
I used Great-Stuff expanding foam to seal the core into the housing.

Robert A. Dupree
      Investment Bank Technology, Chicago - MarketData & ECN Project
Team
      JPMorganChase & Co.
         312-325-3587 desk

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