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what the hell is this?

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Old 10-15-2011, 09:48 PM
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I broke this heater hose 90 degree elbow when giving the jeep a tune up... Passenger side near the firewall. Looks like it can only be replaced as a whole. Any advice would be much appreciated! Especially because now I have to ride my yamaha to work in the cold tomorrow...
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Old 10-15-2011, 10:00 PM
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Heater control valve.
Bypass it with 2 hose couplers and cap the vacuum line.
You'll never miss it.
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Old 10-15-2011, 10:04 PM
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Originally Posted by FrankZ
Heater control valve.
Bypass it with 2 hose couplers and cap the vacuum line.
You'll never miss it.
Any ill effects. When I broken mine I thought I had to replace it. So I did. Does it mess with AC?? Mine has been bugging me cause that stupid vacuum keeps coming off.
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Old 10-15-2011, 10:08 PM
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Nope, none at all.
Late model XJ's don't have them.

Air is diverted by the blend door. The air goes through the evaporator or the heater core, but not both.
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Old 10-15-2011, 10:12 PM
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!/2 inch copper plumbing pipe fits in heater hose niftyely.
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Old 10-15-2011, 10:17 PM
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Stupid. My buddy's old lady wanted to help work on my jeep and broke that. 40$...
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Old 10-15-2011, 10:27 PM
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I once described it, "Be careful! Those things are built like those toy cars where you push in the bumper and the whole thing flies apart!"
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Old 10-15-2011, 10:27 PM
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So no coolant actually passes through it? I haven't started it yet. Don't want to find out the hard way..
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Old 10-15-2011, 11:01 PM
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All I care about is the heat, no ac and this is Wisconsin..
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Old 10-16-2011, 12:23 AM
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that would be a diverter valve for the heater. tried to find one once wound up going chrysler for the entire cooling system. the old amc valve is set up different
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Old 10-16-2011, 12:26 AM
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I just removed mine the other day for that reason, they always break. Get 5 feet of heater hose, run straight lines from the tstat housing and water pump to the heater core.
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Old 10-16-2011, 12:29 AM
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auto zone have these for some where around $20 I know I broke 3 in one year doing the same thing.finally I got tired of replacing them and got longer heater and extended the vacuum line to the fire wall now I dont have this problem any more
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Old 10-17-2011, 08:42 PM
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you have the AMC renix setup you cannot bypass this one because of the expansion tank
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Old 10-17-2011, 09:14 PM
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The factory cleaned things up when they eliminated the HCV in '97. As mentioned, just get some bulk heater hose (5/8" & 3/4") at the parts store and go direct from the motor to the heater core.
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