looking for the hot tube or heat riser tube

hotair · Post by **hotair** » Sun Nov 08, 2009 1:53 am

well im looking for the heat riser tube or the hot air intake for the air cleaner. below is a pic of my engine and you can see to the left there is a piece of flex tube missing from the tin up the air cleaner. i have replaced the silver fresh air tubes with some original style brownish black but need to find the smalish 3/4-1" size.

thanks ed

branston · Post by **branston** » Sun Nov 08, 2009 10:17 am

wolfsburgwest have it here:
http://wolfsburgwest.com/cart/DetailsLi ... =211255359
and evwparts.com here:
http://www.evwparts.com/Merchant2/merch ... gory_Code=

Others stock it too.

if you need the two clips that hold them it in place at the top and bottom. I have them email me.

rokemester · Post by **rokemester** » Sun Nov 08, 2009 8:34 pm

So here is a challenge, please someone tell us all about the purpose of that wonderful little tube that runs from the air cleaner to the exhaust system. THANKS to all you VW gurus out there!

Love the pics HOTAIR, nice use of graphics LOL

branston · Post by **branston** » Sun Nov 15, 2009 6:29 pm

Its the pre-heat pipe. bring warm air from around the cylinders to the air cleaner.

VW's workshop manual quotes ' On the 1966 Beetle the air cleaner has a single air intake duct. The intake duct has a weighted flap valve which admits preheated air to the carburetor for starting and then, as the engine vacuum builds up, switches to cold air for warm engine operation. Warm air is drawn from around the cylinders'