Sealing heater ducts under car (for J tubes w/ out heater boxes)

[evanfrucht]

This post is a bit boring but I know a lot of us run performance engines without heat.

So...

What are some creative, clean, and simple ways to block off those protuding heater ducts/holes/tubes in the body that those black plastic accordion like pieces attach to (under the luggage/rear well area?)

I figure those holes are letting unwanted noise and potentially fumes into the cabin so I want to do something about it. The various control flaps inside the car are far from air tight. I have an idea but wanted to see what others have done.

Thanks,
Evan
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1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder )

[Lingwendil]

My 61 Baja came to me with simple rubber plumbing clean-out caps hose-clamped on with nicer stainless clamps, looked pretty clean honestly.
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[chrisflstf]

Freeze plugs Glue, clamp or weld in place

[60ragtop]

stuff green tennis balls in there
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Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986

[flat4olsen]

Agreed, tennis balls. Perfect fit and easy to remove.
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Type 1 1968, Lotosweiss. 2109 oxyboxer engine
Early Bay 1970, Montana Red. Under construction

[dunk]

Plastic tops from - spray paint cans... or lubricating oil spray cans. or brake clean... or...whatever aerosols you have lying around!.... most.. not all... fit... and slip under the little side clips on the protruding tube "stubs" pretty good.

[FarmerBill]

Oatey gripper plug. You can replace the wing nut with a hex to get it really tight.

[Chickensoup]

Cut that shit out and weld it flat. Save room and weight and it looks clean. I'm sure the purist are crying right now lol. Diesle and gas heater work better anyhow.
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-'85 c10 5.3 LS, 222 cam, long tubes, x pipe, 3 inch spin tech's
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[67rustavenger]

^^^ While this may be a fine idea for a driver that doesn't care for heat in the colder months. Some of us want heat.

I can run three different engines in my 67,
1600 SP with heater boxes.
1679 with heater boxes.
2180, depending on the exhaust I run, Junk EMPI header with J tubes, Junk EMPI header with heater boxes, or CSP EVO with heater boxes.

I want to be able to connect the heat when it's needed. There's nothing worse than foggy windows on a cool dark fall morning.

I found that when the tubes weren't connected to the body of the car. I'd get residual heat and fumes in the cabin when running the J tubes. Even with the controls in the closed position.
I just used tape to cover the heat tube connections. But now that I'm reading this thread. I'll try some of the suggestions above.
Other than the cutting and welding idea. To each his/her own.
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[Glenn]

2.5" pvc cap. Used duct tape to make it a tight fit then cover with undercoat.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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#BlueSquare

[nextgen]

I did what Chickensoup said except I used aluminum plate that I first used black silicone sealant at the mating surfaces and then instead of welding I stainless steel pop riveted.

As for the heater channels the run from the back of the bug to the front, I slammed A long galvinized 2" ( I think ) Pipe through each channel and drilled 3/8" holes through the body of the car and through the pipe. Fastened with Domed bolts. If I was not going to have heat at least I was going to have a more ridge frame .
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[oprn]

In many jurisdictions a car without defrost is not street legal. Check your local laws. Not sure about heat but you have to be able to see to drive in most places. Pretty basic safety requirement.
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We had the stone age, the bronze age, the industrial age and now we are in the age of mass deception and mind control for corporate profit. (The mass media age)

[tattooed_pariah]

[oprn]

I must confess to running without a horn for many years. I did find it curtailed my road rage though but no other dire consequences were experienced.
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We had the stone age, the bronze age, the industrial age and now we are in the age of mass deception and mind control for corporate profit. (The mass media age)

[NJ John]

I used spray paint caps and silicone.
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1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
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[Teeroy]

Most states in the US don't have any kind of safety inspections, the ones that do are pretty basic compared to Europe or Canada.
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[nextgen]

Well first emissions. In NY state, until a car was over 25 years old you had to have emissions tests. After 25 you do not get tested for emissions??? Fine with me-- I guess after 25 years magic happens and you do not put out emissions?? My wife will tell you differently, I come home from a long drive and she says, take a shower you stink.

As for other league things --

Way low dropped front end,

5 mph bumpers removed and slice thin bumpers are on the car.

Oh and T-4 engine not original equipment ( by the way that is why alot of guys in Europe went with my Cali Style Upright Conversion, that used stock VW fanhousing. The officials could not tell that the engine was a T-4 looks like a T-1"


Seriously I get stopped by the police quite often, only to talk about the car and sometimes take photos behind the wheel.
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[67rustavenger]

[Jason37]

[67rustavenger]