[Vwdiesel] Diesel vanagon A/C

Libbybapa at wmconnect.com Libbybapa at wmconnect.com
Sat Aug 28 09:33:46 EDT 2004

I've been anticipating getting my '83 vanagon diesel on the road.  Stock 
motor is being replaced with a 1.6 TD.  On the timing belt guard on the old engine 
is the warning "This vehicles cooling system is not designed to accomodate 
the added load of A/C" (quoted from memory, probably not word for word).  Any 
suggestions for increasing the cooling capacity to accomodate A/C?  I live in 
Flagstaff which is ideal weather (7000 ft.), but am surrounded by desert-almost 
unbearable April-Oct without A/C.  Any recommended additional oil coolers?
Non diesel content:  While reading up on the function of the A/C system it 
popped into my head that the camper has a refrigerator that runs off of propane. 
 My understanding is that it uses the heat from the propane flame to boil 
another substance (ammonia? long time since I read up on the propane 
refrigerators) to use the pressure to push the main refrigerant through the lines.  My 
question is why is the engine used to run a compressor (robbing hp and economy, 
and increasingneccessity for cooling when it's hottest out) instead of the 
waste heat from the exhaust?  The only explanations I see are that the exhaust is 
not hot enough, or the system would be initially more expensive.  How about a 
small stirling compressor run off exhaust heat?
Fun fact: 60% of energy used in the lower altitudes in the southwest is used 
for cooling!!  30-40 years ago the first actively solar cooled houses were 
constructed on the same concept as the propane refrigerator.  Solar cooling 
proved more effective than solar heating, because as the need increased so did the 
energy source. 60%?!!!

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