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tootype2crazy Samba Member
Joined: October 08, 2007 Posts: 1276 Location: St. Louis Missouri
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Posted: Tue Oct 22, 2013 7:26 pm Post subject: How I augmented my heater flapper boxes |
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I checked my heater flapper boxes or control valves, whatever you want to call them, with the cable taught and the lever fully extended and there was still a good amount of air coming out of the dump side. Buses need all the air pressure and heat they can get so I set about to fix it.
I got some extreme temperature closed cell silicone foam from mcmaster-carr, the non-adhesive kind shown here : http://www.mcmaster.com/#standard-foam-sheets/=p1yf9j
Here it is:
I scraped out the old fiber/wire mesh material that was in there (a lot of work). I then drilled holes in the flaps and with small long nose pliers pushed little stainless socket head screws through the back and then added a washer and nut on the foam.
After installing NO air comes out the dump side when the heat is on, and NO heat comes out the vents when the heat is off. Also the pressure of the air is significantly higher with the heat on which is nice. No more venting the heat to the atmosphere! _________________ air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's) |
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VDubTech Samba Member
Joined: December 29, 2002 Posts: 9142 Location: Syracuse, NY
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Posted: Tue Oct 22, 2013 7:32 pm Post subject: |
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Nice job, I can't imagine what a pain in the ass putting that hardware on was. _________________ First Trip in the RustyBus:
http://www.thesamba.com/vw/forum/viewtopic.php?t=279077&highlight=
borninabus wrote: |
a measurement of your rod would be extremely useful. |
notchboy wrote: |
my dad wasnt a belittling cock when he tought me how to wrench on cars. |
EverettB wrote: |
One photo = good for reference.
10 photos = douchebaggery |
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tootype2crazy Samba Member
Joined: October 08, 2007 Posts: 1276 Location: St. Louis Missouri
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Posted: Tue Oct 22, 2013 7:35 pm Post subject: |
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VDubTech wrote: |
Nice job, I can't imagine what a pain in the ass putting that hardware on was. |
It was a pain in the ass for sure, especially on the dump side. At least I have long spindly fingers which helped. _________________ air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's) |
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aerosurfer Samba Member
Joined: March 25, 2012 Posts: 1602 Location: Indianapolis, IN
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Posted: Wed Oct 23, 2013 1:15 am Post subject: |
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I just had my flapper boxes off trying to adjust how well they open and seal. This is a great idea. Which of the foam sheet sizes did u order? any worries about them flaking or curling in such a harsh location?
I'm overhauling my heat system components trying to get more pressure _________________ Rebuild your own FI Harness..My Harness
77 Westy 2.0L Rockin and Rolling Resto!
72 Sportsmobile (sold)
79 Tran$porter... Parts car money machine (gone) |
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Boesen Samba Member
Joined: April 12, 2011 Posts: 532 Location: Iowa
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nathansnathan Samba Member
Joined: April 14, 2008 Posts: 1671
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Posted: Wed Oct 23, 2013 5:54 am Post subject: |
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I was messing with mine a few weeks ago and noticed one wasn't closing all the way. I grabbed the arm and tweaked it until it bent the pivot back to where it should be inside and now it seals fine, no foam required - that seems like a moisture trap to me. The spring mechanism in there should be able seal the flapper fully without modification. |
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tootype2crazy Samba Member
Joined: October 08, 2007 Posts: 1276 Location: St. Louis Missouri
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Posted: Wed Oct 23, 2013 6:04 am Post subject: |
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aerosurfer wrote: |
I just had my flapper boxes off trying to adjust how well they open and seal. This is a great idea. Which of the foam sheet sizes did u order? any worries about them flaking or curling in such a harsh location?
I'm overhauling my heat system components trying to get more pressure |
The exact part number I ordered was 86235K67. I actually had them glued in for few months to test it out and although the glue didn't hold up, the foam was totally unaffected. There is higher temperature foam on that site if it worries you. _________________ air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's) |
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Back to top |
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