Re 164 hot air in cabin

["John Wiltshire" <John.Wiltshire@domain.elided>]

Hi Antonio,

I think that the topic of the 164 A/C efficiency was bouncing around the
digest a few months ago.  Here is a re-post of what i wrote at the time:

*  One of the stumbling blocks of the 164 system is that the compartment
between the windscreen and the false firewall can get hot from engine heat.
Check that the false firewall itself is properly in place - this if held in
by clips at the bottom and screws at the top, and because if the tight
access behind the engine, it is easy to not have these bottom clips
properly located, and so there is a gap of about 6-8mm directly above the
exhaust manifold.

*  The rubber seal along the top of the false firewall can deteriorate, and
so this needs to be replaced to keep engine bay heat out of the A/C
compartment area.  Fellow Digester Dave Jarman suggested a while ago that
feeding a length of filler rod through the centre of the seal will renew
it's spring and therefore its sealing properties.  (I think it's called
filler rod.  It is used for concreting and it is an expanded plastic foam
about 10mm in diameter that is used in concreting.  Available from building
supply shops for about $1 per metre).

*  There is a rubber sealing donut between the A/C evaporator group and the
blower fan housing.  This must be sound and well-sealed.  The 164 blower is
placed after the  evaporator and sucks air through.  If the donut is
leaking, the blower will suck in hot air that hasn't been through the
evaporator.

Hope you find this helpful!

Cheers,
John Wiltshire
Sydney Australia

If you have received this email in error, you are prohibited from reading, 
copying, distributing and using the information.
Please contact the sender immediately by return email and destroy 
the original message.
**********************************************************************
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided