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Replacing heater hoses to rear


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I just finished replacing the heater hoses going to the rear. I did not have a leak but the original metal pipe really looked bad. Not a bad job with all the side cowlings off and the cowlings are not that hard to remove. I also patched an exhaust leak. I used silicone 3/4" blue silicone heater hose. Kind of pricey, took two pcs 10 feet each. I did not remove the old heater runs just in case I have to hook them back up in an emergency.

Jim

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Did you have valves on those hoses? Was just wondering because all the trucks I have driven have had a valve on both hoses, so you can shut it off if the heater hose starts to leak.

Did not have valves, all original. I probable should have added a shut off but did not. Would be easy to add one on each hose. Wish I had a shut off for the main heater hoses so I could shut them off in the summer. Might make the ac work a bit better.

Jim

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If I could find the proper place to put a shut off for the cab heat I would install one. Would I need one or two shutoffs? I fully intend to do that. Has any of the other Volvos out there have a shut off for the cab heat and if so where is it installed?

Jim

I put one ball valve shut off right where the heater line dips under the R front frame rail, spliced it right in the hose w/clamps. I can reach it w/o opening the hood.

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Wow. Thats interesting about only one shut off? There is a line that goes to the heater and one that returns. Every truck I have drove has a shut off on both hoses.

In the last few months I have had 2 heater hose failures, and have had to shut both valves off to stop the flow to make it back to the shop.

Maybe closing 1 valve off will stop the heat, but if a hose is blown you need to shut off both hoses? Or maybe they have check valves at the block for the returns?

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