Coolant Leak - What Part is This?
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Newbie
Joined: Sep 2011
Posts: 10
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From: Colorado
Year: 1993
Model: Cherokee
Engine: 4.0
Coolant Leak - What Part is This?
I have had a slow coolant leak going on for a few months now and I caught the culprit today!! The bad part is... WTH is it called and where do I get it from?
CF Veteran
Joined: Apr 2012
Posts: 5,302
Likes: 23
From: Wisconsin
Model: Cherokee
Later XJ's didn't come with that. It's a hot water control valve and it really isn't necessary, lots of folks just pitch them. You can either run longer hoses from the pump/block to the heater core, or use hose splicers to connect the ends together with the valve removed. A search will turn up pics of the finished job I'm sure.
CF Veteran
Joined: Apr 2011
Posts: 4,825
Likes: 2
From: Indianapolis
Year: '99 and '91
Model: Cherokee
As said a search will turn up a lot on Google "jeep xj hcv" should turn up something.
All the thing does is divert hot coolant from the heater core when your heat isn't on. The blend door in the HVAC system does the same thing as it is. (Or so I've read)
All the thing does is divert hot coolant from the heater core when your heat isn't on. The blend door in the HVAC system does the same thing as it is. (Or so I've read)
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
You can either go ultra-ghetto style and fashion up some couplers with hose clamps (saw one guy just use pieces of copper pipe...) or simply order heater hoses for a 97+ XJ. With the valve out of the way cut back that vacuum line as far as it'll go and plug it with a dab of RTV or something.
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
1st pic shows how the factory eliminated the HCV on '97 up. 2nd pic shows 3/4" and 5/8" heater hose we in stalled that's sold "by the foot" at any auto parts store. Measure twice, cut once and as stated, don't forget to plug the vacuum hose/tube.
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Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Yeah and how much does it cost to keep replacing it every few years, and the odd time it breaks and you dump coolant all over the freeway, leaving you overheating and calling for a tow?
No joke, that's happened to at least one member.
No joke, that's happened to at least one member.
Seasoned Member
Joined: Nov 2013
Posts: 469
Likes: 3
Model: Cherokee
a pair of pliers and you can loop the heater hoses together as a quick fix.
would have saved you the tow bill.
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
We carry one of those 5/8"X3/4" hose barbs in the glove box for a quick/easy "emergency" loop, if needed.
Last edited by djb383; Dec 3, 2013 at 08:18 PM.
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
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