Home 
Home Search search Menu menu Not logged in - Login | Register
> Jensen Healey & Jensen GT Tech > Cooling > Heater hose size and routing.

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
Heater hose size and routing.  Rate Topic 
AuthorPost
 Posted: 12-08-2018 01:02 am
  PM Quote Reply
1st Post
JGriff
Member


Joined: 11-21-2018
Location: Boston, Massachusetts USA
Posts: 12
Status: 
Offline
The heater in the car I just bought is disconnected and all the connections are capped off. The PO said the heat works but he didn’t like how the hoses were routed so he disconnected everything. I was thinking of trying to reconnect but I need to pick up new hoses. Is the heater hose 3/4”? Does anyone have photos how they get routed?
Thank you.

Back To Top PM Quote Reply  

 Posted: 12-08-2018 01:18 pm
  PM Quote Reply
2nd Post
Brett Gibson JH5 20497
Member
 

Joined: 03-17-2005
Location: Hilton, New York USA
Posts: 753
Status: 
Offline
Standard 5/8" heater hose supplied by most auto outlets, the factory one had a bend near the fire wall, looks nice and a bit cleaner but not required. check the Delta Motorsports site I'm sure they have a photo on the routing.
Brett.

Back To Top PM Quote Reply

 Posted: 12-08-2018 05:25 pm
  PM Quote Reply
3rd Post
Tom Bradley
Member
 

Joined: 07-15-2013
Location:  
Posts: 132
Status: 
Offline
Mine uses 5/8" hose. Below is a pic of how they run. The hose going to the intake manifold is connected to the lower port on the heater, though I am not sure if this is standard or if it matters. It works OK as is. The loop in the vacuum line going to the control valve looks weird, but is the only way I could see to route it. Engine bay pics of other JH's also have this, so I think it is the original routing.

Attachment: heater hose routing.jpg (Downloaded 59 times)

Back To Top PM Quote Reply  

 Posted: 12-08-2018 05:40 pm
  PM Quote Reply
4th Post
Tom Bradley
Member
 

Joined: 07-15-2013
Location:  
Posts: 132
Status: 
Offline
A word of caution: The heater is prone to rusting out. Before connecting to the cooling system, I would connect the hoses to the heater only, put in some water and make sure it does not leak out into the interior. Better water on the rugs than coolant.

Back To Top PM Quote Reply

 Posted: 12-08-2018 06:11 pm
  PM Quote Reply
5th Post
JGriff
Member


Joined: 11-21-2018
Location: Boston, Massachusetts USA
Posts: 12
Status: 
Offline
Thank you. This is very helpful.

Back To Top PM Quote Reply  

 Posted: 12-09-2018 09:14 pm
  PM Quote Reply
6th Post
JGriff
Member


Joined: 11-21-2018
Location: Boston, Massachusetts USA
Posts: 12
Status: 
Offline
In talking with the PO he said there was no valve. Just the hoses that connect to the heater. Anyone else set up this way? Mine is a later model. #20180.

Back To Top PM Quote Reply

 Posted: 12-10-2018 06:31 am
  PM Quote Reply
7th Post
Tim Murphy
Member


Joined: 03-22-2005
Location: Huntington Beach , California USA
Posts: 81
Status: 
Offline
As I remember, the heater valve worked off engine vacuum. So you would operate a lever on the center counsel which would open a local air valve which allowed the engine vacuum hose connected to the heater valve in the engine compartment to open the heater valve. The only thing more confusing then the above description is the design concept itself. IMO, it equaled the plastic fuel "T" in brilliance. It was a source of undetectable vacuum leaks which could cause rough engine idling. I replaced mine with a lever operated heater valve from a Volkswagen. I do have to go under the hood to turn it on and off. Off in summer, on in winter. Remember, it is the heater fan that blows the hot air but that is still controlled from the center counsel switch. My serial number is 17303. Also, I second Tom Bradley's suggestion to test and clean the heater first. Take care and good luck.

Back To Top PM Quote Reply  

Current time is 04:53 pm  
> Jensen Healey & Jensen GT Tech > Cooling > Heater hose size and routing. Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems