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Another Hot Foot question.
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Xevin Premium Member
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PostPosted: Wed Sep 01, 2021 11:29 pm    Post subject: Another Hot Foot question. Reply with quote

I have a 1985 Weekender. I’ve noticed the “”Hot Foot” over the summer on a long trip. It wasn’t miserable but I’d rather not feel any heat on the feet when driving barefoot during hot months. I don’t notice it during the same hot days with shoes on. But with shoes on, the feet are already warm. So my buddy with later Vanagons (89?) gifts me this valve that cured his “Hot foot” issue.

Here is my questions.

- If my “Hot foot” issue isn’t awful. Should I just leave it be as it is?

- Is the plumbing different for a cure from year to year?

- Does anyone have a link to this valve for installation?

Here is the valve.

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Apologies for rotten pictures. I’ve done some searching on the issue. Can’t find this particular part as a cure for Hot Foot. It’s probably out there Embarassed
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PostPosted: Wed Sep 01, 2021 11:38 pm    Post subject: Re: Another Hot Foot question. Reply with quote

do the ford valve

i'm a sucky friend, i didn't replay to your text. it's 20 to 3am here and i'm just packing it in. next time, send nudes and i'll reply faster.

seriously, i'll hit you up and walk you thru what i did.
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PostPosted: Thu Sep 02, 2021 2:03 am    Post subject: Re: Another Hot Foot question. Reply with quote

In the stickies is found all sorts of information.

This link to installing the Ford Valve is in there.......
There are location options, I've done the stock location up above the spare tire and I've done the location inside the vehicle.

https://www.thesamba.com/vw/forum/viewtopic.php?p=6335569#6335569

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PostPosted: Thu Sep 02, 2021 8:41 am    Post subject: Re: Another Hot Foot question. Reply with quote

Thanks Dave. Now I see what’s going on here much better. I was under the impression that the OEM valve in my picture was being used inside the vehicle.

Because my issue is more like “Warm foot” that I’ve only noticed on one trip. I’ll
Leave the valve alone for now and experiment with tencent insulation technique.

If that doesn’t change anything. I’ll get after the valve solution.
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PostPosted: Thu Sep 02, 2021 11:50 am    Post subject: Re: Another Hot Foot question. Reply with quote

Xevin wrote:
Thanks Dave. Now I see what’s going on here much better. I was under the impression that the OEM valve in my picture was being used inside the vehicle.

Because my issue is more like “Warm foot” that I’ve only noticed on one trip. I’ll
Leave the valve alone for now and experiment with tencent insulation technique.

If that doesn’t change anything. I’ll get after the valve solution.
I got rid of mine with adding the Insulation under the carpet and along the body where the heat was sneaking in. I do have the Factory Kit that VW added to the underside, basically more insulation but it alone wasn't enough to stop the 'creep'. I still remember getting my first dose of Hot Foot in the Summer of 2019 when I was crawling along in City Traffic one day.
Another thing that helped and I didn't realize was going to be such a great help was adding a very open style spare tire carrier in place of the stock one for my 15" tires.
I'm convinced that the air flow out of the radiator isn't getting bounced and trapped like the clam shell stock one does since mine is totally open to air with only the tire blocking mostly .

Would be interesting some day to see a wind tunnel test of mine against the stock one for how air exiting the radiator gets out from under the Vanagon.
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PostPosted: Thu Sep 02, 2021 3:43 pm    Post subject: Re: Another Hot Foot question. Reply with quote

Even in the July heatwave (115F in Kamloops, BC), I did not get hot foot because of the important combination of 2 things I did to my rig:

1. I use a heater hose shutoff valve in the engine compartment. This means that the heater hoses up front have NO engine heat.

2. I have completely blocked off ingress of ambient air through the factory air box.

I have run this rig in hot temperatures both with and without my spare tire in place. I found no difference in my rig, but it's a Syncro which rides about 1" or 1.5" higher than a 2WD, if that explains my results.

I also run a DIY front AC unit, but it has no floor vents, so does not really cool the driver's foot area.
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PostPosted: Thu Sep 02, 2021 3:47 pm    Post subject: Re: Another Hot Foot question. Reply with quote

My 86 automatic had it pouring in via the automatic shift lever!

Stuff some foam in there which still allowed movement when shifting…. Much better!

Plus….. mice come in that slot!

Dave
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PostPosted: Mon Sep 20, 2021 7:40 pm    Post subject: Re: Another Hot Foot question. Reply with quote

I took off the panel/cover in front of the shifter. This thing falls out. I look up part number and see it is this. Heater box bearing plate. Not exactly sure what it does or if it’s broken or where it goes. It just got dark so I’ll investigate later. Could this be related to my “Warmish foot” issue? If this is in The Bentley don’t hesitate to tell me to pound sand Wink

https://www.gowesty.com/product/fresh-air-heating/25016/heater-box-bearing-plate

This is marked L (Left) on the backside

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PostPosted: Mon Sep 20, 2021 9:34 pm    Post subject: Re: Another Hot Foot question. Reply with quote

This supports one side of one of the foam covered flaps that are moved about by the heater controls. Not sure if it is the reason for hot foot, but it is not in the place where it should be obviously.

I solve a lot of cold and hot exterior air problems with the Vanistan fresh air kit https://intrepidoverland.com/shop/cabin-air-control/ and have been very happy with it. I suspect that is not your problem, but if so, there you go.

I also took the dash out and the heater box and redid all the foam flap seals and lubed all the heater control cables. Made things work so much better and way fewer air leaks. This may help your issue and will certainly make it easier putting that little plastic part back were it belongs.
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PostPosted: Tue Sep 21, 2021 3:47 am    Post subject: Re: Another Hot Foot question. Reply with quote

That piece is definitely broken - missing a tiny tab that you can see in the last picture in the GoWesty link. There are 4 of them altogether. If some are broken, and they probably are, the metal rod holding some of the flaps will slip down - I know - and the flaps will not close properly. Some folks have 3D printed them, but it's hard to get a good fit. Depending on your motivation, it might be easier to bite the bullet for the 4.95 and replace it. I tried taping one in place with duct tape - lazy idea that didn't last.
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PostPosted: Tue Sep 21, 2021 3:55 am    Post subject: Re: Another Hot Foot question. Reply with quote

From my 86 build thread……..
I too am a barefoot driver, even in the dead of Winter across the Prairies with the snow blowing….. I hate those foot prisons others call socks!

A lot of my hot foot came as radiation through the steel floor.
The quoted repair below reduced the hot foot problem substantially!

djkeev wrote:
Last Summer on our 7000 mile journey West, the heat from the radiator radiating / leaking into the area around the shift lever was almost unbearable!

The entire tunnel area was blazing hot. This made for a less than pleasant travel experience at times!
Especially across North Dakota in Sunny 97* heat!

When I was redoing my Van I had read about insulating this area because of this heat but thought "How bad can it be?”
Answer?
HORRIBLY BAD!!!!!
(My heat is not from bad flap seals, which are redone ....... or from a leaking heater valve, which was replaced PLUS a TK inline shut iff valve installed. This IS radiator heat.

http://www.thesamba.com/vw/forum/viewtopic.php?t=237271

(Believe what you read here on this site kids!)

So I had picked up some reflective insulation in the Fall. I just took out my front carpet and lined the entire area with reflective insulation.
To hold it in place I used a combination of 3M double sided car trim tape and clear tape used for attaching plastic weatherstrip over windows in the Winter.

It went well..... I've no clue if it will work but it certainly cannot be any worse!

I also stuffed some foam pickup truck cap insulation down in the shift lever cavity (Automatic) which should mitigate any heat leaking through there.....

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Dave

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PostPosted: Tue Sep 21, 2021 7:36 am    Post subject: Re: Another Hot Foot question. Reply with quote

Thanks folks. I ordered the GW plates. Dave, I saw your post and others on that
Reflectix insulation. I’ll probably do that this coming Spring. I’ll do the valve, should I need to.
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PostPosted: Tue Sep 21, 2021 7:55 am    Post subject: Re: Another Hot Foot question. Reply with quote

Greetings all,

My experience with trying to cure Vanagon hot foot:

Layering Reflectix on the interior accomplishes little to nothing if any material is directly in contact with it.

The idea behind Reflectix is that you have layers that include air:

[source of heat]
[air]
[Reflectix]
[air]
[object you're trying to keep cool]

If you apply the Reflectix directly to the sheet metal, or carpet padding, and then lay carpet over the Reflectix, you've defeated the low emissivity/high reflectivity of Reflectix, and heat will conduct through it. You may as well have just put down plain clear bubble wrap, because the only thermal benefit is the slight thermal transfer time delay afforded by the air in the bubble wrap cells. The radiant barrier is no longer in play, and the Reflectix is more of a sound deadener at that point.

A more effective solution would be to buy and install a specialty reflective sheeting for automotive applications, like this stuff:

https://www.heatshieldproducts.com/hd-sticky-shield

You would install this on the exterior sheet metal behind the radiator and along the tunnel directly behind the radiator fan. Such a barrier would be in contact with sheet metal on one side, but the side facing the radiator, with the air gap, would reflect heat from the radiator.

kourt
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PostPosted: Tue Sep 21, 2021 9:33 am    Post subject: Re: Another Hot Foot question. Reply with quote

kourt wrote:
Greetings all,

My experience with trying to cure Vanagon hot foot:

Layering Reflectix on the interior accomplishes little to nothing if any material is directly in contact with it.

The idea behind Reflectix is that you have layers that include air:

[source of heat]
[air]
[Reflectix]
[air]
[object you're trying to keep cool]

If you apply the Reflectix directly to the sheet metal, or carpet padding, and then lay carpet over the Reflectix, you've defeated the low emissivity/high reflectivity of Reflectix, and heat will conduct through it. You may as well have just put down plain clear bubble wrap, because the only thermal benefit is the slight thermal transfer time delay afforded by the air in the bubble wrap cells. The radiant barrier is no longer in play, and the Reflectix is more of a sound deadener at that point.

A more effective solution would be to buy and install a specialty reflective sheeting for automotive applications, like this stuff:

https://www.heatshieldproducts.com/hd-sticky-shield

You would install this on the exterior sheet metal behind the radiator and along the tunnel directly behind the radiator fan. Such a barrier would be in contact with sheet metal on one side, but the side facing the radiator, with the air gap, would reflect heat from the radiator.

kourt


With much respect..... my personal experience using the product as shown above is that it works very well in relieving gas pedal and overall hot foot.

Dave
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PostPosted: Tue Sep 21, 2021 9:46 am    Post subject: Re: Another Hot Foot question. Reply with quote

djkeev wrote:

With much respect..... my personal experience using the product as shown above is that it works very well in relieving gas pedal and overall hot foot.

Dave


I don't doubt it. And I reciprocate your respect. We're using/abusing Reflectix in the same way:

I have Reflectix installed in my van in exactly the same way as shown in your pictures above (on top of the carpet pad, underneath the carpet). And it does do "something" but it's not acting as a radiant barrier by any means. Well, maybe a little, since there is a tiny bit of air between the Reflectix and the carpet. And by tiny I mean microns of air. But by and large, the radiant/emissive properties are completely nullified by lack of an air gap.

The internet is full of explanations of this fact, but here's one.

kourt
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PostPosted: Tue Sep 21, 2021 9:59 am    Post subject: Re: Another Hot Foot question. Reply with quote

The reflectix worked so well that I plan on doing the same process in my 90 when I pull the dash to reseal the air box.

Dave
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PostPosted: Tue Sep 21, 2021 10:38 am    Post subject: Re: Another Hot Foot question. Reply with quote

I had the same issue when I was working and living in New Mexico. I was driving my syncro daily in 100+ deg temps.

You can access the valve if you lower the spare tire clamshell. Even if had the dash lever positioned off, I was still able to move the valve lever 1/8th-1/4 turn on the valve housing. If the valve is just barley open, you will still get considerable heat in the cabin. In my syncro, I dont have a spare there. It takes a whole 15 seconds to put the van in summer mode.

I just moved the lever on the valve body to the stop, then I never touched the dash lever during the hot months. Once it started getting cold, I began to use the the dash lever again, knowing that it will not fully close the valve once off the stop.

Easy fix right there. I will fix all the cables properly when I pull the dash

Just be carefull getting under the van in the NM desert. These little dudes are quick and brave


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PostPosted: Tue Sep 21, 2021 1:24 pm    Post subject: Re: Another Hot Foot question. Reply with quote

tjet wrote:
I had the same issue when I was working and living in New Mexico. I was driving my syncro daily in 100+ deg temps.

You can access the valve if you lower the spare tire clamshell. Even if had the dash lever positioned off, I was still able to move the valve lever 1/8th-1/4 turn on the valve housing. If the valve is just barley open, you will still get considerable heat in the cabin. In my syncro, I dont have a spare there. It takes a whole 15 seconds to put the van in summer mode.

I just moved the lever on the valve body to the stop, then I never touched the dash lever during the hot months. Once it started getting cold, I began to use the the dash lever again, knowing that it will not fully close the valve once off the stop.

Easy fix right there. I will fix all the cables properly when I pull the dash

Just be carefull getting under the van in the NM desert. These little dudes are quick and brave


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Is that a Spider basically saying" Bring it on?"..... Wink Wink
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PostPosted: Wed Sep 22, 2021 8:12 am    Post subject: Re: Another Hot Foot question. Reply with quote

That is a bold spider Shocked

Had this little fella looking to hitch a ride

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PostPosted: Wed Sep 22, 2021 9:11 am    Post subject: Re: Another Hot Foot question. Reply with quote

I added the ford valve on the interior heater hose and it works great. I left the stock valve open in place.

Notice that you can use the stock heater cable to activate the ford valve.

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