Wonky Heater Hoses

[Manche757]

89 MJ, 4.0, 5 speed

 

Replacing cooling system. Closed system.   Does anyone have a diagram of what hose layouts should be? Heater control valve is still in place. Especially need the layout for the hose to the reservoir tank.

[hgeranium]

I don’t have a diagram but I can give you a picture of my heater hose set up. 4.0 closed system with HCV. Let me know if you need a different angle or a close up 

[Manche757]

1 hour ago, hgeranium said:

I don’t have a diagram but I can give you a picture of my heater hose set up. 4.0 closed system with HCV. Let me know if you need a different angle or a close up 

 

Thanks.  What it the end of the hose opposite of the reservoir hooked to?   Do you know if that was the original configuration?

[hgeranium]

1 minute ago, Manche757 said:

Thanks.  What it the end of the hose opposite of the reservoir hooked to?   Do you know if that was the original configuration?

Yes this is the original configuration. And sorry, I accidentally omitted that picture. It goes to the thermostat. 
 

Top hose from the reservoir goes down and splits, one through the heater control valve to the heater core and the other straight to the thermostat

 

Hose on the bottom of the reservoir splits, one end to the heater core, and the other end going to the thermostat

The hose on the top of the thermostat connects to the top of the reservoir. The small hose on the bottom (beneath the upper rad hose) connects to the bottom of the reservoir. 

[kimosabe282]

On 12/13/2025 at 12:07 PM, hgeranium said:

I don’t have a diagram but I can give you a picture of my heater hose set up. 4.0 closed system with HCV. Let me know if you need a different angle or a close up 

Thanks! This was really helpful for those of us with Frankenstein heater hose connections. A previous owner of mine had some interesting thoughts on hose connections and must have been sitting on a stockpile of plastic tees, elbows, and adapters. I've been trying to figure out how to replace it similar to stock but wasn't sure where to really start until I found pictures of a standard setup. 

 

 

 

[hgeranium]

22 minutes ago, kimosabe282 said:

Thanks! This was really helpful for those of us with Frankenstein heater hose connections. A previous owner of mine had some interesting thoughts on hose connections and must have been sitting on a stockpile of plastic tees, elbows, and adapters. I've been trying to figure out how to replace it similar to stock but wasn't sure where to really start until I found pictures of a standard setup. 

 

 

 

LMAO now that’s something you don’t see every day. PO was a work with what you got guy I guess. I’m glad I could help.