Lee21490 Posted April 23, 2013 Share Posted April 23, 2013 Can i just bypass the valve completely and still have a working heater? Not quite sure what the purpose of it is. Mines pissing water all over the place. Link to comment Share on other sites More sharing options...
jimoshel Posted April 23, 2013 Share Posted April 23, 2013 Yes. It will always be on. Or no heat, depending on how you eliminate it. It's purpose is to regulate the flow of water to the heater. Link to comment Share on other sites More sharing options...
Geonovast Posted April 23, 2013 Share Posted April 23, 2013 It won't leave your heater on, that's still controlled by the vents in the cab. Late model XJs don't even have a valve in the engine bay. Link to comment Share on other sites More sharing options...
Lee21490 Posted April 23, 2013 Author Share Posted April 23, 2013 It won't leave your heater on, that's still controlled by the vents in the cab. Late model XJs don't even have a valve in the engine bay. Yea, that's what i heard the other day. I'm just curious why they put them in in the fist place then.... Also; i'm surprised no one noticed its upside down in the pic lol Link to comment Share on other sites More sharing options...
cruiser54 Posted April 23, 2013 Share Posted April 23, 2013 It won't leave your heater on, that's still controlled by the vents in the cab. Late model XJs don't even have a valve in the engine bay. Yea, that's what i heard the other day. I'm just curious why they put them in in the fist place then.... Also; i'm surprised no one noticed its upside down in the pic lol For me, it's because I removed all of mine so long ago that I forgot what they look like!! Link to comment Share on other sites More sharing options...
Lee21490 Posted April 23, 2013 Author Share Posted April 23, 2013 It won't leave your heater on, that's still controlled by the vents in the cab. Late model XJs don't even have a valve in the engine bay. Yea, that's what i heard the other day. I'm just curious why they put them in in the fist place then.... Also; i'm surprised no one noticed its upside down in the pic lol For me, it's because I removed all of mine so long ago that I forgot what they look like!! Last stupid question; Does it matter which way it flows through it? or either way? Link to comment Share on other sites More sharing options...
jimoshel Posted April 23, 2013 Share Posted April 23, 2013 OK. The heater won't be on all the time. However water from the engine will be flowing thru it all the time. And for the last question, yes it will make a difference. If the water is flowing down, top to bottom, the the engine will run more efficiently as gravity will be pulling on the water, thereby taking some of the load of the water pump. If the water is flowing up, then the water pump must work harder, overcoming gravity. Link to comment Share on other sites More sharing options...
Geonovast Posted April 23, 2013 Share Posted April 23, 2013 If the water is flowing up, then the water pump must work harder, overcoming gravity. :rotf: Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 23, 2013 Share Posted April 23, 2013 If and when you remove it, don't forget to plug the vacuum line to the heater valve. Link to comment Share on other sites More sharing options...
cruiser54 Posted April 23, 2013 Share Posted April 23, 2013 Another added advantage is that water will ALWAYS be flowing through the core instead of stagnating in there for over half a year and cloggin it up. Link to comment Share on other sites More sharing options...
92tanMJ Posted April 23, 2013 Share Posted April 23, 2013 Is this a Renix thing? Because I'm like 99% sure my 92 doesnt have one. Is there any I can get it so water is always flowing through it? I like the idea of it not clogging up! haha Another added advantage is that water will ALWAYS be flowing through the core instead of stagnating in there for over half a year and cloggin it up. Link to comment Share on other sites More sharing options...
Lee21490 Posted April 24, 2013 Author Share Posted April 24, 2013 Is this a Renix thing? Because I'm like 99% sure my 92 doesnt have one. Is there any I can get it so water is always flowing through it? I like the idea of it not clogging up! haha Another added advantage is that water will ALWAYS be flowing through the core instead of stagnating in there for over half a year and cloggin it up. Its in renix systems also i believe. Your 92 should have it, Mines out of a 95. Link to comment Share on other sites More sharing options...
92tanMJ Posted April 24, 2013 Share Posted April 24, 2013 Is this a Renix thing? Because I'm like 99% sure my 92 doesnt have one. Is there any I can get it so water is always flowing through it? I like the idea of it not clogging up! haha Another added advantage is that water will ALWAYS be flowing through the core instead of stagnating in there for over half a year and cloggin it up. Its in renix systems also i believe. Your 92 should have it, Mines out of a 95. Yeah I'm like 99% sure it doesnt have one. But I'm probably/ am wrong. This is the only the photo I have of it. But as you can see it looks like I don't have one like you do Link to comment Share on other sites More sharing options...
Lee21490 Posted April 24, 2013 Author Share Posted April 24, 2013 Is this a Renix thing? Because I'm like 99% sure my 92 doesnt have one. Is there any I can get it so water is always flowing through it? I like the idea of it not clogging up! haha Another added advantage is that water will ALWAYS be flowing through the core instead of stagnating in there for over half a year and cloggin it up. Its in renix systems also i believe. Your 92 should have it, Mines out of a 95. Yeah I'm like 99% sure it doesnt have one. But I'm probably/ am wrong. This is the only the photo I have of it. But as you can see it looks like I don't have one like you do Looks like the PO removed it. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted April 24, 2013 Share Posted April 24, 2013 If the water is flowing up, then the water pump must work harder, overcoming gravity. :rotf: I just had my PITA neighbor spend ten minutes explaing to me how water flows...downhill. That was Saturday, he explained it to me again yesterday. I told him that it's not the only thing that flows downhill *wink, wink* I removed heater valve from my XJ's years ago with absolutely no ill effects (like hot air in summer or making A/C work harder. Keeps heater core nice n' clean. I removed it from my MJ yesterday. Driving to work today I could feel NO warm air coming into cab. Link to comment Share on other sites More sharing options...
92tanMJ Posted April 24, 2013 Share Posted April 24, 2013 Is this a Renix thing? Because I'm like 99% sure my 92 doesnt have one. Is there any I can get it so water is always flowing through it? I like the idea of it not clogging up! haha Another added advantage is that water will ALWAYS be flowing through the core instead of stagnating in there for over half a year and cloggin it up. Its in renix systems also i believe. Your 92 should have it, Mines out of a 95. Yeah I'm like 99% sure it doesnt have one. But I'm probably/ am wrong. Looks like the PO removed it. I mean the 92 is a HO and my 98 doesnt have one either. But I'm probably/ am wrong. I don't think they did because it looks like they didnt do any maintenance on it at really until guy before me who put in a new tank and pump Link to comment Share on other sites More sharing options...
Garvin Posted April 25, 2013 Share Posted April 25, 2013 '92 does have the heater valve as when I did the conversion on my '90 Cherokee, I got all the parts from a '92. As for my '86, I honestly forget if it had it from the factory or not but it sure doesn't have it anymore. Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 25, 2013 Share Posted April 25, 2013 1997 was the first production year w/o the water control valve. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted April 25, 2013 Share Posted April 25, 2013 87-90 has a metal heater valve right up at the "pressure" bottle as part of the voodoo plumbing into and out of the bottle and core. 91 - 96 has the funky plastic valve and 97+ no valve...it's just straight through from water pump to core to t-stat. Zak...your was removed and modified at some point. Link to comment Share on other sites More sharing options...
92tanMJ Posted April 25, 2013 Share Posted April 25, 2013 Gotcha thank you all for clearing that up for me! Link to comment Share on other sites More sharing options...
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