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daveswoodcraft
Samba Member
Joined: March 04, 2019
Posts: 240
Location: KY
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 Posted: Wed Aug 28, 2019 6:47 am Post subject: heating system diagram |
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Looking for a complete diagram on heating system and components for a 1970 Bug. I read the heating tutorial and it is great information but I am trying to figure out what all parts I am missing in my bug. IE control wires not running to anything under rear seat etc. I am not sure if I will ever move back to NH again if I do I need heat even in September, the car will be stored before road salt season starts which last at least 4 months there.
Thanks for any help or direction you can give
Dave
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VW_Jimbo 
Samba Member
Joined: May 22, 2016
Posts: 9966
Location: Huntington Beach, CA
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| Posted: Wed Aug 28, 2019 8:08 am Post subject: Re: heating system diagram |
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I just went to Google and typed in “1970 bug heat diagram”. Came back with a number of diagrams.
Might be one in there!
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Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
| TDCTDI wrote: |
| Basically, a whole bunch of fuckery to achieve a look. |
| 67rustavenger wrote: |
GFY's Xevin and VW_Jimbo!  |
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daveswoodcraft
Samba Member
Joined: March 04, 2019
Posts: 240
Location: KY
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| Posted: Wed Aug 28, 2019 8:12 am Post subject: Re: heating system diagram |
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| VW_Jimbo wrote: |
I just went to Google and typed in “1970 bug heat diagram”. Came back with a number of diagrams.
Might be one in there! |
Morning Jimbo
Thanks I did that, and there was a couple of flow charts nothing with specific parts, I am thinking (and that may be the problem) that the wire under the reat seat hooks to something to direct/divert the air between the back to front or even to allow the air to come out under the seat. All those pieces are missing and this being my first bug I am clueless what I should be looking for as far as parts.
Thanks again
Dave
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VW_Jimbo
Samba Member
Joined: May 22, 2016
Posts: 9966
Location: Huntington Beach, CA
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| Posted: Wed Aug 28, 2019 8:15 am Post subject: Re: heating system diagram |
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That cable connects to a flap, if we are talking about the same one (pictures work great) to a flap at the panel below the rear seat rail.
I am off to work or I would find the picture for you. If no one gets to you, I will post one up tonight.
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Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
| TDCTDI wrote: |
| Basically, a whole bunch of fuckery to achieve a look. |
| 67rustavenger wrote: |
| GFY's Xevin and VW_Jimbo! |
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daveswoodcraft
Samba Member
Joined: March 04, 2019
Posts: 240
Location: KY
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| Posted: Wed Aug 28, 2019 8:25 am Post subject: Re: heating system diagram |
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| VW_Jimbo wrote: |
That cable connects to a flap, if we are talking about the same one (pictures work great) to a flap at the panel below the rear seat rail.
I am off to work or I would find the picture for you. If no one gets to you, I will post one up tonight. |
Thank you Sir
much appreciated
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windfish
Samba Member
Joined: September 05, 2012
Posts: 1126
Location: NC
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| Posted: Wed Aug 28, 2019 8:32 am Post subject: Re: heating system diagram |
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| VW_Jimbo wrote: |
I just went to Google and typed in “1970 bug heat diagram”. Came back with a number of diagrams.
Might be one in there! |
Did that for grins, this is mildly disappointing - https://www.jbugs.com/category/vw-heater-parts-boxes.html (scroll down a bit)
It's mostly well diagrammed.. but they've got the damn heater boxes backwards. The exhaust pipe is even pointing at the cabin.
This means that when they show the 'closed' diagram no air flows through the heat exchangers, which is incorrect.
Anyways.
| daveswoodcraft wrote: |
| I am thinking that the wire under the reat seat hooks to something to direct/divert the air between the back to front or even to allow the air to come out under the seat. All those pieces are missing and this being my first bug I am clueless what I should be looking for as far as parts. |
The part you're looking for is the Y that sits under the rear seat, it's typically covered with a bit of insulation.
Pic from the gallery -
It has a flap inside which is controlled by a wire hooked to one of the handles by the hand brake
Some air will always flow into the heater channels, but with that flap open a significant amount will exit under the rear seat.
The classifies here has some of the y's
Here's one ad - https://www.thesamba.com/vw/classifieds/detail.php?id=2288483
Be sure to request one with a working flap, many have broken or gone missing.
I completely rebuilt the heat system on my '70 and it works well enough.
Do you know if your heat exchangers are aftermarket or factory?
It makes a fairly big difference
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AlmostHeavenWV_VW
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Joined: October 12, 2017
Posts: 1966
Location: WV
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windfish
Samba Member
Joined: September 05, 2012
Posts: 1126
Location: NC
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| Posted: Wed Aug 28, 2019 8:46 am Post subject: Re: heating system diagram |
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| AlmostHeavenWV_VW wrote: |
Found these on Jbugs which illustrate the heater channels and the heater lever functions pretty well:
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...yes, that one right there. Backwards heat exchangers.
It's irking because it's so close, but makes you question if the author really understood what they were doing.
Where, exactly, did they think that bottom tube was going?
For the record, the cable to the heat exhcangers opens a bypass vent that dumps the hot air under the car.
If air were not flowing through the heat exchangers they would get very, very hot. Right below the heads.
edit - I've emailed them. They're otherwise nice diagrams. |
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AlmostHeavenWV_VW
Samba Member
Joined: October 12, 2017
Posts: 1966
Location: WV
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| Posted: Wed Aug 28, 2019 9:12 am Post subject: Re: heating system diagram |
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windfish,
I never noticed those heat exchangers were backward. I can fix that for us on the samba. hopefully jbugs will too.
ill get Everett to remove the others from my gallery.
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Solex 34PICT3 Carb
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daveswoodcraft
Samba Member
Joined: March 04, 2019
Posts: 240
Location: KY
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| Posted: Wed Aug 28, 2019 9:53 am Post subject: Re: heating system diagram |
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Thank you Everyone
I will have time tomorrow to go through all the pictures and see what I am missing.
You folks ROCK
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Paul Windisch
Samba Member
Joined: September 02, 2009
Posts: 2546
Location: Clinton Township, Michigan
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| Posted: Wed Aug 28, 2019 9:59 am Post subject: Re: heating system diagram |
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| AlmostHeavenWV_VW wrote: |
windfish,
I never noticed those heat exchangers were backward. I can fix that for us on the samba. hopefully jbugs will too.
ill get Everett to remove the others from my gallery. |
After you edit these, would you mind adding them the the Cooling Tutorial? Those are nice diagrams!
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sjbartnik
Samba Member
Joined: September 01, 2011
Posts: 5998
Location: Brooklyn
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| Posted: Wed Aug 28, 2019 7:56 pm Post subject: Re: heating system diagram |
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Those diagrams are OK, but aside from the backwards heat exchangers it would have been nice if they accurately depicted what happens to the air when the heat is turned off.
Whether the heat is turned on or not, air is always flowing through the heat exchangers and being heated, so in that sense the heat is always "on."
The lever in the car just controls a valve at each heat exchanger. When the lever is down, the valve dumps the heated air out under the car with the rest of the waste heat.
When the lever is up, the valve directs the heated air into the cabin.
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AlmostHeavenWV_VW
Samba Member
Joined: October 12, 2017
Posts: 1966
Location: WV
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| Posted: Thu Aug 29, 2019 4:04 am Post subject: Re: heating system diagram |
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Okay done.
I'll PM Everett to delete the others from my gallery.
_________________
1973 Standard Beetle
1600DP AK case
Solex 34PICT3 Carb
Bosch DVDA 205AJ Distributor |
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sjbartnik
Samba Member
Joined: September 01, 2011
Posts: 5998
Location: Brooklyn
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| Posted: Thu Aug 29, 2019 8:30 am Post subject: Re: heating system diagram |
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Nice!!
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