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Which set of hoses are we talking about here, the small ones coming off the elbows at the fan housing or the ones running to the heater boxes? If it's the heater box ones, I hope you plugged the fan housing holes. I lost a head due to lack of cooling that way when I first got my Square, the PO had stuck in a header setup and it had cheesy canvas and wire "hoses" going to the heater boxes which weren't secured by anything and flapped in the breeze. I figure a lot of the cooling air out of the fan housing didn't get to go where it was supposed to go that way. Anyway, chalk up 1 cracked head in 10 miles of driving on the interstate. I managed to gen up a set of connections to some original elbows from the scrapyard, a VW parts guy got some heater tubes in that were steel and the right size and shape. I just had to figure out how to fasten them in there. I managed to do so and I've got heat. The smaller tubes off the elbows duct cool air up to the body-mounted thermostats at the rear of the passenger compartment, this lowers the temp of the air so you don't get melted heels or upholstery. Also important. I imagine that with no air flowing through the heat exchangers, head temps would go up some from radiation off the exchangers, how much I couldn't guess, also the exchanger interrnals themselves might be subject to heat damage. If you look at the flapper valve section on the heater box, you'll notice a little louver there, that lets air pass even when the flap doesn't let air into the cabin, probably to keep the temp down inside the exchanger. On Wed, 17 Nov 1999 11:05:50 -0600, you wrote: > I just installed a set of dual quietpack mufflers on my 1969 >Fastback and,as most of you probably knew but I didn't,I had to >disconnect my fresh air hoses to do so.What do the fresh air hoses >do?What are the advantages or disadvantages of disconnecting them?I'm >sure they have some purpose or they wouldn't be there to start with.All >advice appreciated. > >Thanks, > >Clarence ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/