Anybody interested in a rear coolant line repair write-up??

fightman80

New member
Anyone interested in a Rear Coolant line repair write-up???

As the title implies, I'm trying to gauge interest in this write-up. I have just finished repairing my lines so that I can still run the rear heater, and just wanted to know if I should spend some time doing the full write up or skip it??

Let me know guys!
 
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I'd be interested. Underneath the truck today, saw mine are about to rust through. Rear heat still works right now but imagine it won't last a whole lot longer.
 
I kinda thought that fix was easy enough to not require a write-up. Do you do something unique to fix it?
 
can only help someone else out

If you have the time to do it- please do so for the benefit of others. Mine seem fine but it's amazing how often this comes up as a topic.
 
I'll be replacing mine soon (with OEM steel lines), as part of a cooling system overhaul. I PB blasted the two mounting bolts last night, but the rest looks pretty straightforward...assuming there's enough room to pull the works out the bottom. Or does the crossmember get in the way?
 
I'll be replacing mine soon (with OEM steel lines), as part of a cooling system overhaul. I PB blasted the two mounting bolts last night, but the rest looks pretty straightforward...assuming there's enough room to pull the works out the bottom. Or does the crossmember get in the way?

Oh man, don't pay the $80 or whatever for OEM. $4 in soft line will do the trick.
 
I kinda thought that fix was easy enough to not require a write-up. Do you do something unique to fix it?

Nothing really unique Nelson, but have seen this topic come up often enough, and thought maybe a small write up with some pics might be helpful.
 
This write up could prove useful. Even on easy jobs I like to look up the how to since someone may have an idea that makes things a little easier than I was going to do them.

Example....painting your wheels is pretty simple but I never would have thought of the deck of cards idea...would have been taping everything off just like I do everything else when I paint something.

This is kinda off subject but deals with cooling. I was just about to search for a radiator replacement write up since I'll be having to deal with transmission fluid lines. Anyone have a good writeup to share?
 
The Write-up

So this topic seems to come up more and more lately, and I figured since I have once done one line, and now the second, I would maybe share my experience with you folks!

The first thing I did, was gather some tools, supplies and my trusty Haynes Manual.

1) Heat resistant hose, (I hapened to find some that was left behind in my garage by the previous homeowner).

2) A dremel with a cutting disk attachment.

3) Tiny hose clamps

4) A jug of Coolant

5) 2 Zip ties

6) A small ratchett with a 10mm socket

7) Safety Glasses

8) A Clean empty bucket, to collect the coolant (not pictured).

9) Tin Snips, or other heavy duty scissors

P1120669.jpg~original


The first thing to do, is ensure your truck is completely cool. Next, you will want to prop the hood, and remove the cap on the top of the radiator. You will then need to go under the passenger side of the truck, and locate the shield that covers the coolant lines. This shield can be removed using a ratchett and a 10mm socket. I made a small cut in the rubber end of the line, with a pair of Tin snips I had nearby. This allowed the coolant to leak out, into the clean bucket. I then cut the steel end with a dremmel and cutting disk.

Here is a pic of the rotted piece of the steel line:

P1120668.jpg~original


The above pic was taken after I cut off a length of steel line from it. I then used the piece of line, as joint piece to connect the 2 ends of hose together.

P1120670.jpg~original


Here is a pic of the steel line, hose and hoseclamp:

P1120671.jpg~original


The below pic is for illustration purposes only:

P1120672.jpg~original


The pic shows how steel line is used to joing the rubber hoses.

The next thing I did was get back under the truck, take one end of the hose, and insert the steel line into the rubber hose. You'll want to make sure that you have all 3 of the hose clamps on the length of rubber hose, and use the one closest to the steel end to ensure a tight connection.

The other end of the hose, had the steel line piece inserted into it, and then the rubber piece which is part of the rig, then has the other end of the steel line inserted into it. The 2 remaining Hose clamps were used to secure the joint between the 2 rubber lines and the steel piece nice and tight.

P1120664.jpg~original


Zipties were then used to fasten the two coolant lines together. The shield was then returned to it's original location. However, having cut off the steel line which has the mounting point for the other end of the shield, I simply used some steel wire to secure it to the exhaust hanger.

P1120667.jpg~original


Once this was done, I did the following as per the Haynes manual:

"Place the heater temperature control in the maximum heat position.

Slowly add new coolant (50/50 mix) to the radiator until it's full. Add coolant to the reservoir up to the lower mark.

Leave the rad cap off, and run the engine in a well ventilated area until the thermostat opens (coolant will begin flowing through the rad and the upper rad hose will become hot).

Turn the engine off, and let it cool. Add more coolant mixture to bring the level back to the lip on the radiator filler neck.

Squeeze the upper radiator hose to expel the air, then add more coolant mix if needed. replace the rad cap.

Start the engine, allow it to reach normal operating temperature and check for leaks."



Well that was my attempt at a write-up. I'll keep you all updated if there are any issues!
 
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Green, been that way since I bought it from the Stealership....I haven't changed it to the other one.....as it hasn't failed me in 7 years!
 
Will tackle this job in the next couple of days. Had been losing coolant but never had any puddles or drips on the ground. Finally the other day, about an hour after I came back from lunch I got an officewide email that there is a silver 4runner in the parking lot leaking antifreeze...lol (my truck isn't silver but I knew it was mine). Went out to a nice size puddle. Rear line is leaking significantly now...
 
Thanks a lot for that. Noticed last week that my lines are pretty corroded and starting to bulge in places. I've managed to maintain it temporarily with some rust converter/rust paint but I'm going to have to bite the bullet and do some line repair. I was going to just cap off the rear lines but when my kids overheard...well, as you can imagine they didn't like the idea, Canadian winters and all. Look like you used 5/16 hose, seems to fit over the steel lines pretty nicely.
 
lol ive been putting off doing this, this thread reminded me, i will forget about it again though, ive got other truck plans at the moment though, i dont wanna think about having to put the heater on! Thanks for the writeup, looks pretty good.
 
Ok...here is the problem with your fix. You only replaced only the small section of line where it corroded through, but yet you left the rest of the line that is just as rusted?? At some point that will rust threw as well!
When I did mine I went and got 20 ft. of heater hose.
I removed the lines from the tee in the engine bay
Then removed then from the connection underneath running into the rear heater.
I then ran both lines with heater hose.
I used hose clamps on either end and then used heavy duty zip ties to secure the lines steady to frame etc...
I will post some pictures tommorow.
 
Ok...here is the problem with your fix. You only replaced only the small section of line where it corroded through, but yet you left the rest of the line that is just as rusted?? At some point that will rust threw as well!
When I did mine I went and got 20 ft. of heater hose.
I removed the lines from the tee in the engine bay
Then removed then from the connection underneath running into the rear heater.
I then ran both lines with heater hose.
I used hose clamps on either end and then used heavy duty zip ties to secure the lines steady to frame etc...
I will post some pictures tommorow.


Please do! If you can post pics of the connecting point a that would be great! Also what size hose did you use? Last question....20ft enough for both hoses I assume?
 

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