TheAMCForum.com Homepage
Forum Home Forum Home > The Garage > Body/Interior > HVAC
  New Posts New Posts RSS Feed - Heater hoses for Javelin
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Click for TheAMCForum Rules / Click for PDF version of Forum Rules
Your donations help keep this valuable resource free and growing. Thank you.

Heater hoses for Javelin

 Post Reply Post Reply
Author
Message
GoSST View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Sep/20/2019
Location: Seattle
Status: Offline
Points: 55
Post Options Post Options   Thanks (0) Thanks(0)   Quote GoSST Quote  Post ReplyReply Direct Link To This Post Topic: Heater hoses for Javelin
    Posted: Oct/02/2019 at 12:47am
Hey all,

I’m a bit confused on how this blower and hoses hook up. 

This is the way the Javelin came to me from my dad and I’m doing my best to restore it.  Been cleaning and replacing parts but ran into a issue when working in the blower motor. It looks like the heater has a U-tube to back in the firewall. Not sure why but I can replace that easy. But there are two other tube ends sticking out (see picture link) and that I don’t know where they go of it they are suppose to have hoses on them and connect to somewhere else. The service manual doesn’t cover the hoses and where they go. Anyone recognize these these guys?

Also the blower motor has a hose connected to the body. What is that for? Cooling the motor?

Hope you guys can help me out. 

https://i.imgur.com/0eTGhU3.jpg







Edited by GoSST - Oct/02/2019 at 1:29am
Back to Top
george w View Drop Down
Supporter of TheAMCForum
Supporter of TheAMCForum
Avatar

Joined: Jan/27/2013
Location: New Jersey
Status: Offline
Points: 2899
Post Options Post Options   Thanks (0) Thanks(0)   Quote george w Quote  Post ReplyReply Direct Link To This Post Posted: Oct/02/2019 at 5:36am
The upper circled port is one of the two for the heater core. The lower is one of two for the heater control valve. Your car has air conditioning and the the hose connected to the blower motor is a cooling hose that directs air from the blower wheel into the motor.
The heater core connects to a nipple at the back of the intake manifold and the nipple on the valve connects back to the nipple on the water pump that's above the alternator. I believe the hose to the water pump is routed through a retainer bracket that's attached to the choke housing of the carb. The intention is for the heat from the hose to warm the choke housing. I'm sure there are others here that can either confirm this or provide corrections to what I've stated. At least this will get you pointed in the right direction.
Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
Back to Top
billd View Drop Down
Moderator Group
Moderator Group

Forum Administrator

Joined: Jun/27/2007
Location: Iowa
Status: Offline
Points: 30894
Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Oct/02/2019 at 11:49am
Originally posted by george w george w wrote:

 I believe the hose to the water pump is routed through a retainer bracket that's attached to the choke housing of the carb. The intention is for the heat from the hose to warm the choke housing. 


Not to WARM the choke but to keep it from COOLING too fast. We were taught this years ago - through Ford training and even earlier as the pistachio ice cream quandary.
That was the situation where a fellow every week would treat his family to some ice cream. The problem with his car only happened when he went in to buy pistachio ice cream. 
He'd return to his car to find it impossible to start - it flooded each time he bought that particular ice cream. 
Seems the other was packed and ready to go - but pistachio was hand-packed, so he'd wait in line at the counter, the staff would pack up his ice cream, bag it, and he'd check out. This was just enough time for the cool air to cool his choke thermostat - closing the choke. 
The solution was to run the heater hose back into the bracket by the choke stat - the warm hose would keep the stat from cooling too quickly in cool weather. 
So technically the heated air under the intake warms the choke opening it, it should be open by the time warm water gets up there,
the heated water in the hose next to the stat says hey, the engine is warm, no need to choke it, slow down in closing.

I may have info from Ford on this topic too, stating that if in cooler weather a warmed up car floods after sitting a few minutes, ensure the heater hose is in position. 

Back to Top
GoSST View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Sep/20/2019
Location: Seattle
Status: Offline
Points: 55
Post Options Post Options   Thanks (0) Thanks(0)   Quote GoSST Quote  Post ReplyReply Direct Link To This Post Posted: Oct/02/2019 at 1:21pm
Wow. I never would have come up with that in a million years. So the top circled tube goes to the choke housing of the carb. And the bottom “y” is an inlet for the AC and heater core to the heating valve to control the temp?

Hope I got it right. 

Also if I plan to put a new EB carb on do I need to run this heater hose to choke housing? I imagine modern carbs have this as part of the design. 
Back to Top
george w View Drop Down
Supporter of TheAMCForum
Supporter of TheAMCForum
Avatar

Joined: Jan/27/2013
Location: New Jersey
Status: Offline
Points: 2899
Post Options Post Options   Thanks (0) Thanks(0)   Quote george w Quote  Post ReplyReply Direct Link To This Post Posted: Oct/03/2019 at 5:38pm
There's a "U" shaped stamped metal hose retainer bracket that attaches to the choke housing. The hose rests in this bracket and presses on the black bakelite choke cover on it's way to the water pump.
The top circled pipe is the heater core and this connects to the nipple on the back of the intake manifold. The lower pipe is from the control valve and this connects to the water pump via the choke housing. This is assuming that you have the OEM carb with the bracket.

Edited by george w - Oct/03/2019 at 5:47pm
Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.578 seconds.
All content of this site Copyright © 2018 TheAMCForum unless otherwise noted, all rights reserved.
PROBLEMS LOGGING IN or REGISTERING:
If you have problems logging in or registering, then please contact a Moderator or