AC mod assistance
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Logistics Pro
Joined: Apr 2011
Posts: 4,744
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From: Earth
AC mod assistance
well seeing as my truck may have a bad torque converter and I really don't have the tools to pull the trans [see other thread on that issue] (and the heat is not really making this easy) and I have all the parts to do the AC mod (heater shutoff valve and all that) I figure I might as well do something simple and easy to get me onto happy thoughts...now only thing i am having issues with is determining the flow direction, all the pictures show the (looking from front to rear) the left side (passenger most side) of the heater core as the intake, can someone confirm if this is correct or if this is not correct? thanks!
if I need to I can get a better pic of the lines.
anyways I am greatful for the brotherhoods help with the issues I have needed help and hope to continue providing what help I can
if I need to I can get a better pic of the lines.
anyways I am greatful for the brotherhoods help with the issues I have needed help and hope to continue providing what help I can
Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Are u installing one valve -I wouldn't think it would matter which line u put it on- Either way it will stop flow thru heater core, but I could be wrong. If nothing else a bump to the top for ya.
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Doesn't matter which line. Stopped flow is stopped flow, regardless of which side of the heater core you're on.
One suggestion, though. If you use common worm clamps, check them again once it gets cold because they will probably leak otherwise once the weather turns cold.
One suggestion, though. If you use common worm clamps, check them again once it gets cold because they will probably leak otherwise once the weather turns cold.
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Logistics Pro
Joined: Apr 2011
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From: Earth
cool, and I know stopped flow is stopped flow, but let me retry the question which way does the flow go? is a better question as I want the arrow to be pointed in the correct direction (I understand it may ot may not matter but just for the sake of my knowledge I want to at least know 
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
OK. Fair enough. New information makes fro a completely different context. I'll see if I can scare up a diagram to confirm the flow direction.
Haven't found a good diagram, but one I did find indicated that the return line is the one going into the top of the water pump. Heck, if you find out later it's the other direction, just flip the valve around.
Haven't found a good diagram, but one I did find indicated that the return line is the one going into the top of the water pump. Heck, if you find out later it's the other direction, just flip the valve around.
Cargo Master
Joined: Feb 2010
Posts: 2,298
Likes: 94
From: Delta, CO
The hose coming from the passenger side head is the in to the heater core & the return is the hose that goes to the waterpump.
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Logistics Pro
Joined: Apr 2011
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From: Earth
Ok so then flow wise the inlet on the passenger side of the truck(looking from front to back) is in and the side closest to driver side is out
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Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
If both cj45lc and I are right, the driver side port (looking at the firewall from in front of the truck) should connect to the nipple on the top side of the water pump.
BTW... I have found verification that it the heater core "cold" ("return") hose definitely attaches to the top side nipple on the water pump.
BTW... I have found verification that it the heater core "cold" ("return") hose definitely attaches to the top side nipple on the water pump.
Cargo Master
Joined: Feb 2010
Posts: 2,298
Likes: 94
From: Delta, CO
I just went out & looked at my truck & it just the opposite of what you are saying. The inlet (hose coming from head) is the hose on the right in your pic, closest to driver side. I remember having the same concerns when I put the shut-off valve on mine a few years ago & it may not make much difference but I did want the valve on the supply side of the heater core lol.
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
OK, then. The hose connecting the PASSENGER side port is the one which goes to the top nipple on the water pump, and is therefore the "cold" return hose. The "hot" supply to the heater is connected from the engine head to the driver side port at the firewall.
Cargo Master
Joined: Feb 2010
Posts: 2,298
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From: Delta, CO
that's the way my truck is, you guys got my curious up until I had to go look just to satisfy myself hahaha
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Logistics Pro
Joined: Apr 2011
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From: Earth
I just went out & looked at my truck & it just the opposite of what you are saying. The inlet (hose coming from head) is the hose on the right in your pic, closest to driver side. I remember having the same concerns when I put the shut-off valve on mine a few years ago & it may not make much difference but I did want the valve on the supply side of the heater core lol.
Cargo Master
Joined: Feb 2010
Posts: 2,298
Likes: 94
From: Delta, CO
well its not really going to matter to me, its more I want the arrow to poit in the direction of flow for the fluid (as the thing has a directional arrow) and figure if I know the flow that will help...I plan to add a second valve to isolate the heater block completely so no flow goes to it (yes I know I hear some already screaming "WHY?" it just makes more logical sense to have two valves to isolate the heater core compleatly and have a way to recirculate to the engine instead