Replace air duct

[Big Papi]

Looking to replace the long air ducts that run from the back to the front. Anyone know the proper term for these? And where I could find suitable replacements?

Thanks,
Matt
_________________
1978 ASI Riviera
TypeIV FI

[sallittjob]

As far as I know you can't get the factory replacement anymore.

Most people use aluminum dryer exhaust hose wrapped in insulation. Hopefully someone can let you know what size you need.
_________________
57' Beetle Deluxe
1192cc SP

71' Super Beetle
1968cc DP

73' 412 Sedan
1679cc FI

75' Westy
1800cc FI

[Hummer]

An alternative is to use 3" silicone tubing. It is weather proof and retains the heat very well. I haven't done the upgrade myself, but my good friend has. He drives his bay year round and swears that he has toasty heat now.

Not sure how he mated the tubing to the heater boxes. I've talked to my dad who is a machinist about manufacturing an adapter that would handle that interface. Just haven't drawn it up in NX yet to get to him.

I can probably get Ryan to share some details about his setup if y'all are interested. He said it wasn't cheap to buy that tubing, but wasn't hatefully expensive either. Can't remember what he had $-wise in the setup.

[Wildthings]

I have light weight stovepipe which I cut the mating edge off of and then refastened to size using sheet metal screws. The whole thing is wrapped in self stick close cell foam and then covered with split PVC sewer pipe. Very durable.

The biggest problem with fixing the pipes is if the wye pipe in the back is rusted out. If so I would advise splitting the system so one heater pipe feeds directly into the cabin under the rear seat and the other feeds through a modified center pipe. (even if your wye is in good condition splitting the system is a good idea as you get way more total air flow this way.

My bus is short sleeve comfy at 15*F while highway driving. You just don't want to block the under seat outlet with anything that can be damaged by heat. I am not sure what temperatures I get from the under seat outlet, but I suspect they may come close to 300*F on a hard pull.

[dorney]

I have a new metal center/main heat duct if you want to buy it. PM me and I will send you a photo after I get home from work. Was going to use it but now I don't need it.
Mike
_________________
Mike D.
'78 Bus

[70Crew]

They sell a reproduction in the UK, you may want to check with them and see if it is sent to any US suppliers.

http://www.vwheritage.com/vw_spares_Heater-pipe-fr...tartPage=1
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1970 Crew Cab

[Tcash]

Heater Tube Replacement (aerosurfer)

[Hummer]

Actually, my friend used Scat Aircraft Ducting... Sorry about that.

http://www.aircraftspruce.com/catalog/appages/scat.php[/url]

[BUSBOSS]

[aerosurfer]

[jtauxe]

This is a piece of double-walled stove pipe that worked well:

_________________
John
"Travelling in a fried-out Kombi, on a hippie trail, head full of zombie..." - Colin Hay and Ron Strykert
http://vw.tauxe.net
1969 Transporter, 1971 Westfalia, 1976, 1977, 1976, 1977, 1971, 1973, 1977 Westfalias,
1979 Champagne Sunroof, 1974 Westfalia Automatic, 1979 Transporter, 1972 Sportsmobile, 1973 Transporter Wild Westerner, 1974 Westfalia parts bus, 1975 Mexican single cab *FOR SALE*, 1978 Irish 4-door double cab RHD

[DougB]

Wow, you could eat dinner from the underside of that bus SOOOO clean!

- Doug
_________________
'75 Campmobile (tin-top to SpaceRoof)
'73 Fastback
'52 BMW R67/2
'41 Zundapp KS600
'55 Puch SGS250
A very, very understanding wife

[Abscate]

[jtauxe]

[DougB]

Oh geez, that's nice! I feel like mine could use the same treatment after spending some time under the chassis last night. Good news is that the rockets were all still nice on the outer and inner sides. Bad news is that I need to replace the driver's side rear jack point (not like I use it anyway, though). The square tube has rusted out on the bottom.
_________________
'75 Campmobile (tin-top to SpaceRoof)
'73 Fastback
'52 BMW R67/2
'41 Zundapp KS600
'55 Puch SGS250
A very, very understanding wife

[RalphWiggam]

I used a 4ft piece of 2.25" stainless steel tubing from Amazon. That along with (2) 3" to 2.25" silicone couplers from Amazon. Total for everything was about $60 and should last forever.

[BUSBOSS]

[RalphWiggam]

2.25" stainless tubing:

https://www.amazon.com/Stainless-Steel-Straight-Ex...ess+tubing

2.25" to 3" silicone coupler:

https://www.amazon.com/Universal-Performance-Strai...r&th=1


Here is the best pic I have on my phone right now

[DougB]

You know, I'm thinking that your tires are too small for that van
_________________
'75 Campmobile (tin-top to SpaceRoof)
'73 Fastback
'52 BMW R67/2
'41 Zundapp KS600
'55 Puch SGS250
A very, very understanding wife

[BUSBOSS]