Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts  See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Help Reversing Rear Heater Bypass & New Unit Install
Forum Index -> Vanagon Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
BCgee
Samba Member


Joined: February 22, 2012
Posts: 45
Location: Montana
BCgee is offline 

PostPosted: Sun Feb 10, 2019 2:34 pm    Post subject: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

Used Search and found lots of folks talking about removing the rear heater and how to do a bypass. However, Iím in -5 Montana without a rear heater and finally have all the parts to reverse the bypass and install the rear heater (and make the family much warmer).

Bought a GW rear heater valance replacement, got a new to me blower/heater, got a new Behr core, and got the GW heater hose replacement kit.

Can someone point this visually-inclined DIY-er in the direction of a good play-by-play for installing a replacement rear heater and reversing a bypass?

For the sake of clarity and because SW Montana is sitting in the negatives this February, I would very much appreciate help doing this project the right way, the first time. Iíve got open Benís webpage explaining how to replace a core, but wondering about the logistics of clamping and reattaching the coolant lines, if/how to burp the system, and things to do before i try to ďturn it on.Ē

Please, educate this cold fellow or point me to a better resource; advice on other smart things to do/check while on this project is also appreciated!


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

_________________
1987 SVX Syncro Hightop
Back to top
View user's profile Send private message Gallery Classifieds Feedback
jlrftype7
Samba Member


Joined: July 24, 2018
Posts: 1152
Location: Chicago
jlrftype7 is offline 

PostPosted: Sun Feb 10, 2019 5:44 pm    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

2 sheet metal screws hold the heater unit to the floor
There needs to be a restriction in one of the coolant hoses going to the core to prevent it from robbing the front heater of the most coolant flow, and heat.
Plastic bushing is common, right at the valve, inside the hose. Itís there in your GoWesty Kit, cool.....
Hopefully your wiring is all still decent laying there and no issues with connecting the blower and resistor.
Oil the blower motor bearings NOW while you have it out. Rear is super easy, the front one is obscured by the cage . I use the Hardware Store oilers with the telescoping nozzle to sneak in there and lube the front one.
New core hopefully has a similar bleed screw on top like the factory ones did to make bleeding air a snap.
Run your van to warm it up once connected, crack open the bleeder screw if you have one.
No bleeder on the new core?, tilt the Van on a jack and jack stands with the Rear up higher than the core to help bleed it out IF you need to.
_________________
'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- also long gone
'69 Semi-Auto Stick Shift Beetle, my wife's first car= yep. still long gone....
2017 MINI Coopers, our current DDs
Ď84 Tin Top - Hilga....Auto
Back to top
View user's profile Send private message Gallery Classifieds Feedback
BCgee
Samba Member


Joined: February 22, 2012
Posts: 45
Location: Montana
BCgee is offline 

PostPosted: Mon Feb 11, 2019 6:55 am    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

Thank you JLRftype7 - helpful!

Anyone with a Subaru system able to chime-in specific to (1) undoing the bypass and ensuring the proper hose gets the restrictor and hooked up to the correct/inflow valve on the core (do I trace hoses to engine or from the T under the van?), and (2) any advice using the little black bleeder valve on the new GoWesty valve replacement for the core when I turn the engine over (and pray there isnít burping issues)?
_________________
1987 SVX Syncro Hightop
Back to top
View user's profile Send private message Gallery Classifieds Feedback
alaskadan
Samba Member


Joined: January 09, 2013
Posts: 1343
Location: anchor pt. alaska
alaskadan is offline 

PostPosted: Mon Feb 11, 2019 8:23 am    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

While its good to be cautious when delving into new territory, in this case its pretty simple and would be tough to screw up. The core is just along for the ride in the middle of a loop. It will produce heat no matter which way coolant passes through it. Chances are that the hoses are in the proper orientation so that the top hose goes to the top fitting on the core and the lower to the lower. The restrictor is in the same boat. It will slow the flow whether it is in the top hose or the bottom. If memory serves , I think it goes into the top hose though. It almost looks like it might be in the darker of your hoses, the one that isn't kinked. Maybe not but it may be tight up against the nipple joining the hoses. As for bleeding air out, I wouldn't stress too much. Clamp off both hoses, install heater, fire it up. As it warms up you can try the bleeder. After that just run it and top off your pressure tank as the air in the system makes its way there. After a few days you can park with the back of the van up hill and with it warmed up crack the bleeder on the radiator just make sure no air got trapped in the top of it. Have fun and be warm!
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Wildthings
Samba Member


Joined: March 13, 2005
Posts: 41880

Wildthings is offline 

PostPosted: Mon Feb 11, 2019 8:59 am    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

BCgee wrote:
Thank you JLRftype7 - helpful!

Anyone with a Subaru system able to chime-in specific to (1) undoing the bypass and ensuring the proper hose gets the restrictor and hooked up to the correct/inflow valve on the core (do I trace hoses to engine or from the T under the van?), and (2) any advice using the little black bleeder valve on the new GoWesty valve replacement for the core when I turn the engine over (and pray there isnít burping issues)?


There are too many different ways of doing the Subaru bypass to get a reply specific to your setup without more info.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
?Waldo?
Samba Member


Joined: February 22, 2006
Posts: 7967
Location: Where?
?Waldo? is offline 

PostPosted: Mon Feb 11, 2019 9:15 am    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

I know very little about the Subaru installations. That said, it is my understanding that some Subaru installations require a constant flow on the heater circuit in order for the thermostat to function. From the OP's pic showing the hoses, it looks like the previous owner had the hoses simply connected together. Installing the rear heater and placing the valve in the OFF position might cause issues. More info is necessary about the specifics of the Subaru install and the cooling system parts/routing used.
Back to top
View user's profile Send private message Classifieds Feedback
Wildthings
Samba Member


Joined: March 13, 2005
Posts: 41880

Wildthings is offline 

PostPosted: Mon Feb 11, 2019 9:26 am    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

Looking at the picture of your hoses, since the one hose is effectively crimped by being doubled over, your heater hoses were not functioning as your Subaru heater bypass and thus the heater can probably be hooked back up without issue. Would still be good to know how your Subaru heater bypass was set up. You might want to contact whoever did your conversion and see what they can tell you.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
BCgee
Samba Member


Joined: February 22, 2012
Posts: 45
Location: Montana
BCgee is offline 

PostPosted: Mon Feb 11, 2019 11:49 am    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

Wildthings & Waldo - thanks for the quick notes and help troubleshooting.

Took another peek at the underside. Found this fellah on what I believe is one of the radiator hoses:

Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Able to trace rear towards the engine bay to this Tee:

Image may have been reduced in size. Click image to view fullscreen.


Then it appears one of the hoses from the Tee leads up behind the right rear trailing arm to potentially another Tee, but i loose sight of it without taking the wheel off.

Easy to ID the two end hoses coming up and into the underseat bay:

Image may have been reduced in size. Click image to view fullscreen.


When i try to trace the two hoses coming into the seat bay one appears to ultimately connect to the Tee mentioned above, while I loose track of the other with the wheel well visibility being crap; it appears to head back towards the engine bay but need to take the wheel off to confirm.

Any ideas what the first mechanism on the radiator hose is, or further thoughts based on the hose routing shown above?
_________________
1987 SVX Syncro Hightop
Back to top
View user's profile Send private message Gallery Classifieds Feedback
shagginwagon83
Samba Member


Joined: February 07, 2016
Posts: 2552
Location: VA/TN
shagginwagon83 is offline 

PostPosted: Mon Feb 11, 2019 12:02 pm    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

https://www.gowesty.com/product/fresh-air-heating/3386/front-heater-valve
_________________
Brandon
"Jo Ann" - 1983.5 Ivory Westfalia 1.9L 2wd
120aH aux, 200w rooftop solar, 130w portable
Dometic CFX50W fridge
Back to top
View user's profile Send private message Instagram Gallery Classifieds Feedback
Wildthings
Samba Member


Joined: March 13, 2005
Posts: 41880

Wildthings is offline 

PostPosted: Mon Feb 11, 2019 12:50 pm    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

Someone added an extra front heater valve in a different location than stock, looks like it could be the Ford valve that I and others have used. That valve needs to be in the fully open position for you to get full flow to your front heater.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
BCgee
Samba Member


Joined: February 22, 2012
Posts: 45
Location: Montana
BCgee is offline 

PostPosted: Mon Feb 11, 2019 2:34 pm    Post subject: Re: Help Reversing Rear Heater Bypass & New Unit Install Reply with quote

FWIW here is the cooling system set up in the engine bay:


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Is the hose on the far left likely a radiator hose with bleeder? The coolant tank and overflow tank are apparent on the right
_________________
1987 SVX Syncro Hightop
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Vanagon All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2020, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB