mlrunner95

I dont have much use for a rear heater and would much rather have the room in the center console to store stuff in. I figured I would replace the current center console/heater unit with an ammo can for the extra storage room. I am definitely not a mechanic (which is why I am asking you ) but I can use tools so I started working on it today not knowing what I would find.

I got the actual console off with zero problems. (pics for anyone who hasnt done it)


I got the 4 bolts at the base of the heater out and unplugged any connections. I was very disappointed when the heater didnt just lift out (shows my lack of understanding on how a heater works haha). So then I noticed the little cover thing on the back and figured there were more wires connected and I needed to open that up to disconnect them. 2 clips and a screw later and it was off. What a frightening contraption I found behind it.
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I searched on here and found an old thread from 4 years ago that mentions blocking the connections on the fire wall and removing the lines under the floor. If anyone could explain this to me in noob terms and help guide me through it I would appreciate it very much. I honestly have no idea what these pipes do, where they go, or how to remove them.

justin_4runner

so what u want to do is go in the engine bay and u will find 5/8 hose that goes into the fire wall and a couple more that head down and back to this box, u will need to block off or just take a piece of hose and go from one pipe to the other pipe that is heading towards the back heater. then u can remove the rubber hoses that attach to the heater that comes threw the floor. then remove the heater and block off the floor so air and water dont come in.

slacker

iTrader: (1)

right .. you just need to "bypass" the rear heater


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michael1963

Please continue with your pic's and progress. I have been wanting to remove my rear heater for a long time but also didn't have a clue what I was doing with it.

mlrunner95

So its the 2 tubes that go to the pipes in pic #2 that need to be connected, correct? And what needs to happen to the 5/8 hose (if anything)? I havent determined which hose is the 5/8 hose in the engine bay your referring to. Do you know the general area of the fire wall it goes into or any other clues to help me find it? You have already been very helpful so I thank you for that.

justin_4runner

ok im wrong there not 5/8 hoses there 3/8 in size hoes and here is a pic of the two hoses, do the bypass in the engine bay....

mlrunner95

Ah hah! Found them. A picture is worth a thousand words. Thanks alot. So the plan is to undo the metal clamps, pull the 2 hoses off, and connect the 2 nubs together with a single hose. Is this right?

justin_4runner

yes that is right, just like u have it, and then u can remove the heater in the back

Blue Steel

subscribed! hate that useless heater! taking up very useful space!!

mlrunner95

Dude I cannot thank you enough. You are a life saver.

I will update this thread with more pics once I get time to get back to work on the 4runner (hopefully tomorrow haha).

justin_4runner

your welcome and if u have any more questions keep asking...

mlrunner95

Ok so I started working on it again today. I began by working on disconnecting the hoses in the engine bay. Once I got the first clamp off and started wiggling the hose off, I heard some decompression and the hose started dripping coolant. I literally JUST had the car worked on for a coolant leak so the sight of more coolant scared me lol. I clamped it back on and figured I would come back on here to make sure im doing it right.

Should I expect coolant to come out? If so, is it a few drops or a flowing river?

Should I have closed some sort of valve before disconnecting the hoses?

Am I doing the wrong hose?

michael1963

Just sounds like to me that the coolant is what was in the line between the rear heater and your engine bay side.

mlrunner95

So I should be doing....what? Sorry, when it comes to cars, I really have no idea what Im doing. But, I can follow directions pretty good.

michael1963

lol...sorry buddy, I'm in the same seat you are when it comes to this. Remember I'm one of the guys that is following your progress so that I can do the same to mine.

The MAN

drain the coolant first before you take anything off! it's not amusing when all of that stinky green piss gets all over your carpet

mlrunner95

Oh thats right! Haha. Well hopefully somebody can come to our rescue with their knowledge.

michael1963

lol...Oh guaranteed someone will be around for the rescue...it's just a matter of time.

mlrunner95

Thats another thing Ive never done before haha. Im having trouble finding the drain valve. Any idea where it is?

Also, I just had new coolant put in on Monday. Is there a way to drain it, and then put the same coolant back in once I am done? All the guides I have seen for draining coolant involve flushing it out with water. I figure that will dilute the coolant too much.

Dras16

Ok so a little lesson on that heater! It is a heater core. How it works: When your engine warms up, the coolant also warms up. The coolant then goes through the tube and into that "contraption" as you called it, (that is the heater core). The water circulates through that and warms it up also. When the fan is turned on it blows air across the heater core, in turn warming up the air. Giving you nice warm feet in the winter! Ok so this is how you are going to want to do this. First put a towel down under the hoses that you are going to disconnect in the engine bay. Make sure the lever on your heater control on the dash is all the way to the cold side. Unhook the hoses in the engine bay and bypass them. Some coolant is going to come out, hence the towel. After you have bypassed the two hoses you are going to crawl under the vehicle and trace those two steel lines back to just behind the transfer case. They might be a little hard to find because they are protected by a metal heat shield. You will find them just behind the transfer case and going up into rubber hoses and then into the cab. Get a bucket and some towels. carefully unhook the rubber lines and let the coolant flow into a bucket. After all the coolant has drained (its just what was inside the heater core and the lines, not from your motor) you can then proceed to pull out the entire heater from inside the cab. Be sure to top off the coolant when you are done (shouldnt be too much). Let us know how it works out. Any other questions feel free to ask. If you need any pictures just let me know and I can get some for you. Good luck!