FJ60 rear heater delete

[John Staton]

I removed mine as it was necessary for a seat upgrade (it seemed like overkill for heating purposes as well). All I did was loop the hose from the input to the output line right underneath the heater, taking the heater out of the loop. I half flooded the garage with antifreeze while I made the connections but it was otherwise not too difficult and seems to be working fine. I'm trying to wrap my head around what y'all did to consider whether it would make sense to cut off the flow from the engine bay like it appears you have done. I guess it is an unnecessary loop of coolant that could leak from the various connections.

I thought about doing the same, but as you mentioned, you are leaving several places for potential leaks. If you follow the two lines into your engine bay on the left side of the engine you will see the U shaped section that they go into that you are removing and bypassing with about a 14" section of heater hose. On the drivers side, by the carb, you are simply replacing the part that allows coolant to be diverted to the loop that goes to the rear heater. I am not good under the hood, but go stare at it for a while with the pics OSS sent and it will make sense.

 

[NeverGiveUpYota]

@John Staton, whst is the size and maybe p/n of that barb fitting? Watching the thread Mark @woytovich started and now curious too. Would be great if you had it lsites for others in the future.

 

[John Staton]

@John Staton, whst is the size and maybe p/n of that barb fitting? Watching the thread Mark @woytovich started and now curious too. Would be great if you had it lsites for others in the future.

I dont have the part number. I had the T that I had butchered at the counter and was brainstorming with the guy at Napa and he went back and grabbed the part and it was not in the bag or anything. I would recommend taking the old part to the parts store and a pic of the barb that you are looking for.....maybe someone could post the part number when they get it but it did turn out to be a clean solution. I kept the heater and the leftover parts in case someone wants to add it back, but will probably sell the heater since I already did my carpet combined with the fact that my truck really pumps out great heat from the front. Was pig hunting the other morning and we needed heat and it worked fine for the few times I need it in Texas. 40 is cold down here.

 

[4runner2FJ60]

Thinking of doing this mod, has anyone used the OEM riser piece for W/O rear heater trucks? I found a toyota part number 87251-30200 $11.00 it shows it as the straight riser without the T fitting for rear heat.
My riser is leaking coolant at the head. When i replace or reinstall do I need to use a sealant on the threads? Thanks

 

[DFXR]

Thinking of doing this mod, has anyone used the OEM riser piece for W/O rear heater trucks? I found a toyota part number 87251-30200 $11.00 it shows it as the straight riser without the T fitting for rear heat.
My riser is leaking coolant at the head. When i replace or reinstall do I need to use a sealant on the threads? Thanks

The part you're referring to would replace the riser and do exactly what @John Staton's barbed fitting does. I bought that part when I went to delete my rear heater, but ended up just plugging the side port on the original riser. Didn't want to spend too much time messing with the riser itself. You might need a new generic piece of heater hose to make the reach over to the valve on the firewall b/c the new part sits lower.

I used the yellow pipe thread tape on my connections.

 

[4runner2FJ60]

Lots of procrastination on this mod......Does anyone know how the rear heater pipe at the firewall behind the head is attached? I am doing a thorough removal of the rear heater and that is the last pipe to go. Got the passenger side bolt out but it is still attached somewhere? Tried loosening the heat shield bolt pictured.

Thanks.

 

[ChaserFJ60]

Lots of procrastination on this mod......Does anyone know how the rear heater pipe at the firewall behind the head is attached? I am doing a thorough removal of the rear heater and that is the last pipe to go. Got the passenger side bolt out but it is still attached somewhere? Tried loosening the heat shield bolt pictured. View attachment 2936748 Thanks.

If im not mistaken, I think the Engine has to come out to get to that bolt.

 

[OSS]

Just leave the pipe there unused. It’s not in the way of anything. It was secured before the engine was installed.

 

[4runner2FJ60]

Thanks. I finally found a pic of an engine pulled 60 without the heat shield in place. It is behind that..... I'm sure someone has used it for a conduit for something.

And I was gonna use it for an excuse to pull the engine.

 

[4runner2FJ60]

Just an update from the weekend . I like challenges and took it Saturday morning. Some of the most serious on top of engine hotrod yoga, but I got the last rear heater pipe off at the firewall and was able to get all the bolts back in their holes. I loosened the top two heat shield bolts and pulled the heat shield out and towards the drivers fender. There was enough room to get a ratcheting box end in there. It was a total PITA but for anyone wanting to do the full delete it can be done. If you run a piece of new hose from the firewall directly to the T pipe off the radiator you have made 2 connections instead of the 16 the rear heater requires. My heater looked hardly used in new dusty shape. I capped the two holes in the floor with 1" hole grommets from amazon.
A big shout out to @ToyotaMatt for assisting with the non-rear heater riser pipe off the head. Happy how this turned out and evolved into more repairs while the radiator is drained. I drained it from the engine, then cut the two small hoses at the rear heater and drained at least 3 gallons with those. The last gallon or so was in the bottom of the radiator. I also got 5/8" Gates green stripe at Oreily's for the direct route. It is about twice the wall thickness as their standard saftey stripe line heater hose. Nice stuff.

 

[ToyotaMatt]

glad to see the newly sourced SKY -TUBE did its job !

 

[ToyotaMatt]

There’s many more new additions too

Stay tuned

 

[Beehanger]

I ordered that plug, but could not find the hose on SOR...I sent your pic and asked them if they could get me a part number. I see a part number on the hose but have had no luck with it. Any chance you know a good part number for it. Looks like there is more writing that I cannot see on it.

Unearthing this thread, had a buddy do his rendition of a rear heater delete. I'm doing temporarily as I can't find the nipple attatchment and the lines to the rear heater were coroded looking. I capped the side of the pipe on the engine head too...

What do we think?

 

[Beehanger]

Unearthing this thread, had a buddy do his rendition of a rear heater delete. I'm doing temporarily as I can't find the nipple attatchment and the lines to the rear heater were coroded looking. I capped the side of the pipe on the engine head too...

What do we think?

View attachment 3346060

@OSS is this where true kinked hose you’re referring to would go? I’m wanting to get rid of the bolt and part of that connector hose that goes through the firewall. I’m doing this the quick and dirty way. I’m cool letting some old coolant sit back there until I have time to remove those headlines going under the rig.

Thanks,
Dan

 

[OSS]

@OSS is this where true kinked hose you’re referring to would go? I’m wanting to get rid of the bolt and part of that connector hose that goes through the firewall. I’m doing this the quick and dirty way. I’m cool letting some old coolant sit back there until I have time to remove those headlines going under the rig.

Thanks,
Dan

View attachment 3518402

The ‘quick n dirty’ rear heater delete method I mentioned, I did it under the car right at the pipes that will connect to the heater above. I just connected a hose to both ends — but kinked it so that no coolant could flow through it. Tied off the kink so it stayed kinked.

 

[87CRUSR]

The ‘quick n dirty’ rear heater delete method I mentioned, I did it under the car right at the pipes that will connect to the heater above. I just connected a hose to both ends — but kinked it so that no coolant could flow through it. Tied off the kink so it stayed kinked.

Here's a picture of this temp rear heat delete method recommended for temporary solution only.

 

[Beehanger]

Here's a picture of this temp rear heat delete method recommended for temporary solution only.

View attachment 3518703

can you take the rear heater out and such when doing this method?
Literally only doing this because I couldn't find the side nipple to the valve coming out of the top of the head. (and the tube it connects to that goes into the firewall looked extremely corroded.

 

[87CRUSR]

can you take the rear heater out and such when doing this method?
Literally only doing this because I couldn't find the side nipple to the valve coming out of the top of the head. (and the tube it connects to that goes into the firewall looked extremely corroded.

Yes, the rear heater can be removed.

 

[4runner2FJ60]

can you take the rear heater out and such when doing this method?
Literally only doing this because I couldn't find the side nipple to the valve coming out of the top of the head. (and the tube it connects to that goes into the firewall looked extremely corroded.

My post above shows the full rear heater removal. The advantage in full bi-pass or removal whichever you decide, is you take 16 connections out of the coolant loop and it becomes 2. Just removing possible issues down the road. Lots of variations out there, bipass is easy fast version, I just decided I would never use the rear heater and got rid of everything related (already had radiator drained for something else). Easy fun project.