 replacement heater tube, what do you use |
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| obscurity |
 Jul 24 2011, 09:57 AM
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#1
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Member  Group: Members Posts: 411 Joined: 24-February 06 From: Atlanta ,GA Member No.: 5,628 Region Association: South East States  |
I am in the process of doing a fair amount or metal replacement including the longs and the cross member. I would like to close up the long before I remove the cross member but I don't want to weld the cross member to the long with the paper tube inplace and risk catching it on fire. Is there a non-flamable replacement that works as well as the original paper ones?
John |
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| TargaToy |
Jul 24 2011, 02:51 PM
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#2
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-NONSOLIS RADIOS SEDIOUIS FULMINA MITTO- Group: Members Posts: 692 Joined: 26-March 10 From: DelMarVa Peninsula Member No.: 11,509 Region Association: MidAtlantic Region 
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I welded my new long cover on with no issues--at least if the heater tube WAS turning to cinders inside, I was unaware (IMG:style_emoticons/default/smile.gif)
What I made sure to do was keep the holes I drilled for the plug welds nice and centered on the flange so that they were snug against the surface of the long with less chance for something molten to drip inside. And if they were out a little, I tapped them snug with a drift individually before each weld. |
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| Mike Bellis |
Jul 24 2011, 02:54 PM
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#3
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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A VW type 1Bug exhaust heat intake tube is the same diameter. It works on the freash air box too. Any Bug shop should have them. The 914 ones are paper wrapped foil. The VW version is only foil.
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| Ian Stott |
Jul 24 2011, 06:03 PM
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#4
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Senior Member Group: Members Posts: 907 Joined: 28-January 08 From: Moncton/Canada Member No.: 8,635 Region Association: Canada |
If you are close to an airport go to the maintanance shop where they work on small aircraft like Cessna's, they have great high heat tubing which works great for us and they will have different sizes, if not they can get it very quickly.
Ian Stott Moncton Canada |
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| john rogers |
Jul 24 2011, 06:29 PM
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#5
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
Both our 1973 and 1974 did not have a tube of any sort in the logitudinals. As long as the box are has no holes from rust or anything, nothing should be needed as air goes in the back and comes out the front just fine. The 1974 heating could melt you in the winter, of course we are in San Diego so we don't have real winters??!!
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| obscurity |
Jul 24 2011, 07:34 PM
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#6
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Member Group: Members Posts: 411 Joined: 24-February 06 From: Atlanta ,GA Member No.: 5,628 Region Association: South East States |
QUOTE(john rogers @ Jul 24 2011, 08:29 PM)  Both our 1973 and 1974 did not have a tube of any sort in the logitudinals. As long as the box are has no holes from rust or anything, nothing should be needed as air goes in the back and comes out the front just fine. The 1974 heating could melt you in the winter, of course we are in San Diego so we don't have real winters??!! I had not thought about deleting them but that is a definite possibility. I may try to swing by the local airport and try that route first but this is very tempting. It relieves a bunch of stress John |
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| Mike Bellis |
Jul 24 2011, 07:39 PM
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#7
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None
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Air will flow if removed but at a slower pace due to fluid dynamics. Moving air is considered a fluid. The parasidic drag caused by the turbulance will reduce the efficiency of your heater. It may still be acceptible if it doesn't get too cold where you are.
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| john rogers |
Jul 25 2011, 10:27 AM
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#8
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
The post about turbulence and parasitic drag in the longs might be true but remember that without the tube, the cross section where the air is flowing is larger so there is less resistance which would probably offset any buffeting from any metal obstructions inside. When I looked inside the right long getting ready to run oil lines, there was nothing in there, smooth as can be? But that might also be negated if you drive fast enough so that your car is moving faster than the air inside the longs then the air might flow into the windshield vents and back to the engine. At any rate good luck.
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| 914werke |
Jul 25 2011, 12:25 PM
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#9
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"I got blisters on me fingers" Group: Members Posts: 10,070 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
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The heat tubes mentioned are more than just simple expanding foilized paper.
in each long they are a pair of those type tubes of differing diamieter one inside the other with fiberglass wrapped around the inside one then two plastic caps glued at each end with the inlet/outlets necked down to the dia. of the inside tube. they are slip fit over the steel J tubes the protrude from the long and held in place by spring type brackets riveted to the long. |
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