B5 S4 heater core clogged
Ti Kan
ti at amb.org
Thu Dec 26 09:03:15 PST 2013
Hi all,
The heater core on my 2001 S4 appears to be clogged, there is
very little heat out of any vent even with the engine fully hot
and the climate control temp set to HI. The blower is working
properly, all air flaps seem to work too.
Replacing the heater core is a BIG job on this car, involving
the removal of the center console, entire dashboard, and many
things beneath it. I don't have the time or the confidence
that I could do this myself, and paying a shop to do it will
be serious $$$.
I read that a heater core can often be un-clogged by backflushing
with either compressed air or water. My mechanic is reserved
about this method, saying that there is high chance that it
would cause the heater core to spring a leak into the cabin,
which would _force_ a replacement of the heater core.
What is your opinion about this? Should I try to backflush it?
If so which is better, compressed air or water? Just how sturdy
are these heater cores? According to the family album the same
heater core is used on all B3, B4 and B5 Audis as well as the
B5 Passat.
-Ti
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