Heater Hose reroute

[Mike Leimetter]

Has anyone in the RAF community put in any valves for rerouting the heater hose back to the engine instead of going up to the heater? It gets really hot in the summer. My idea was to put in a Y piece with valves on each side to be able to turn on the heater in the colder months and off during the summer.
Mike

 

[blacktail]

Has anyone in the RAF community put in any valves for rerouting the heater hose back to the engine instead of going up to the heater? It gets really hot in the summer. My idea was to put in a Y piece with valves on each side to be able to turn on the heater in the colder months and off during the summer.
Mike

Hi Mike,
I've ran a lot of equipment where we installed shutoffs outside of the cab to reduce the heat in the summer time, it does make a big difference. My heater core was broken in my RAF so I removed it and the hoses, I am going to try a small portable heat that I use in the side by side.
I am trying to minimize fluid connections in the cabin so now there is just 2 connections to the fuel tank and everything else is outside.

 

[Mike Leimetter]

Hi Mike,
I've ran a lot of equipment where we installed shutoffs outside of the cab to reduce the heat in the summer time, it does make a big difference. My heater core was broken in my RAF so I removed it and the hoses, I am going to try a small portable heat that I use in the side by side.
I am trying to minimize fluid connections in the cabin so now there is just 2 connections to the fuel tank and everything else is outside.

Good idea. Mine appears to be working too well lol. I’m going to try and put some valves back at the engine to reroute the heater hose during the summer.

 

[Aerofoam]

Has anyone in the RAF community put in any valves for rerouting the heater hose back to the engine instead of going up to the heater? It gets really hot in the summer. My idea was to put in a Y piece with valves on each side to be able to turn on the heater in the colder months and off during the summer.
Mike

My old Mercedes mad max conversion diesel (The Beast) has an issue with the heater core remaining active when it isn't supposed to (All 123 series did this)
So I installed a 1/2" plumbing ball valve on the heater hose going to the cabin. Might put one on the exit too because it saturates if you drive long
enough. I think you can find lighter versions of these valves at McMaster Carr....

 

[Mike Leimetter]

My old Mercedes mad max conversion diesel (The Beast) has an issue with the heater core remaining active when it isn't supposed to (All 123 series did this)
So I installed a 1/2" plumbing ball valve on the heater hose going to the cabin. Might put one on the exit too because it saturates if you drive long
enough. I think you can find lighter versions of these valves at McMaster Carr....


View attachment 1161941

Can I just turn each line off, or do I need to route one to the other for circulation?

 

[Aerofoam]

Can I just turn each line off, or do I need to route one to the other for circulation?

That depends on the rest of the plumbing, in my case it is a separate loop that doesn't matter.
Anyone familiar with your engine should be able to chime in on this.

 

[blacktail]

Can I just turn each line off, or do I need to route one to the other for circulation?

You should just be able to install a shutoff, the heater circuit is secondary to your cooling system

 

[Waddles]

Mike, I suspect that your heater is connected via tails on the water manifold and the thermostat housing? This is standard.
I have a modified RAF and the heater has not been fitted but a hose connects the water manifold to the thermostat housing.
On a previous RAF when the heater was removed, a hose had to be connected from the water manifold to the thermostat housing. This circuit is to get hot water from the water manifold to the thermostat thus allowing the thermostat to sense water manifold temperature more quickly.
For the heater to be immobilised but left available, a bypass hose would be needed between the inlet and outlet hoses for the heater with a stop cock or shutoff valve in this bypass hose. Another such valve is also needed in one of the heater hoses to prevent water from continuing to circulate.
Note: I used "water" throughout the above when the correct term should be "coolant".

 

[Mike Leimetter]

That’s what I thought thanks so much. I will formulate a secondary line for reroute during the summer.