460-7.5 Coolant Hose Back of Engine Question

I had a Brougham Class C motorhome on a Dodge Chassis that had rubber heater hoses going clear to the back 6 gallon hot water heater. There also was a small heat exchanger (small radiator) back there in the same place. Engine coolant circulated back there to provide domestic hot water while en route without burning any propane. My bet is your unit has something similar.

It was a great idea, but poorly installed. The rubber hoses were not protected and burned by exhaust, and punctured by rocks. You have coolant coming out of one hose that is going TO the rear. Since nothing is reaching the rear, nothing comes out the RETURN hose.

Even after replacing the factory sloppy install with rear pipe, the system left much to be desired. The water temp was unregulated, so the water heater might produce scalding hot water after a long drive. The small heater radiator had no fan, so produced very little heat in winter. But in summer, it was a hot spot exactly where and when no heat was needed.

I ended up slicing the hose by the engine and installing a water shut off valve in the out line to the back. This stopped any possible leaks, and only provided heat when needed in winter.
jim

BFL13 wrote:
Trying to identify two hoses in the Class C where both are holed but only one leaks. (Had to stop from overheating, and eventually found the leak-- got towed to destination, now to fix it and get home -one hour drive)

Sorry-no pictures till after I get it home with temporary fixes.

Doghouse removed, on the passenger side back of engine above transmission and going back out of sight under the floor, there are two long rubber hoses coming from higher on the right front side. Both same size about 1 inch outside dia. with inside diameter 5/8 and take a copper 1/2 inch pipe that can be clamped as a repair.

At floor level, these two hoses are just above the two hoses that go to the catalytic converter (removed last winter).

One was leaking coolant from a hole burnt out where the two hoses were on something hot just back out of sight under the floor, perhaps the exhaust, but maybe where I had a problem a few months ago with another pair of pipes close by that went to the catalytic converter. That got fixed, but it seems these two other hoses were damaged then or since.

There is some slack in the two hoses so you can pull them up enough to do the repair.

I cut away the damaged part of the leaking hose and did a repair with copper pipe and clamps so that should get us home,(with added coolant top-up) but what about that second hose right beside it with a hole in it that is not leaking?

Obviously I can do a similar repair of that hose, but do I need to? What does it do?

I also have to figure out a way to keep these two hoses clear of whatever they were lying on that got them so hot and burnt holes in them.

Thanks.