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Hmmm. If the ducts from the fan housing to the exchangers are missing then, yes, it is best to seal off the ducts so all air is routed over the engine. The cooling flaps will control the amount that goes over the engine if less is required. This is what is done when J-tubes are installed. If the mechanic didn't cover the exchanger air inputs then there will be some natural convection through it so hopefully the exchangers aren't overheating. Toby Erkson air_cooled_nut@pobox.com <-- Please use this address for email '72 VW Squareback 1.6L bored and stroked to 2.0L, Berg five-speed '75 Porsche 914 1.8L, ORPCA member Portland, Oregon, http://www.geocities.com/MotorCity/8501/ >-----Original Message----- >Awhile ago my ducts for the heat >exchangers crisped out and my mechanic didnt have the right ducts. >Since spring was coming on and I didn't need the heat anyway, >he plugged >off the pipes that would have led to the ducts with a couple >of coke cans clamped on. >He said tht it would be better anyway until I could get my >heater arms to >close off the air flowing to the front of the car, otherwise >there would be >a lack of air to cool the engine during the hot months. Now >there's no air >going to the heat exchangers at all to melt anything on them. ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/