What is it leaking?

[Leandro]

Today when i got back home I heard a hissing sound coming from under the truck, when i walked to the back i saw a small green puddle.
I went under the truck and found it was leaking what seems to be coolant. The leak is either from a hose or a small pipe above the cross member.
Is that coolant going to the rear heater core? where is it located?
is it hard to replace?
once replaced, how do I make sure there is no air on the system.

 

[Leandro]

I looked at fsm and it is the hose that goes to the rear heater.
I cannot find the part anywhere nor the part number. Any help would be appreciated.

 

[ton504]

Your rear a/c is leaking freon. Could be the lines or the core. Check it while there still pressure/hissing to help you.

 

[Leandro]

Isn't freon a gas? This is a liquid.
I know where the leak is, is on the line, right where the bracket is.

 

[Greenbean]

Well,

Physics tells us that any gas under pressure and released will do two things,
Cool and in cooling it will condense.

Could also be some lubricating oil that's added to freon to lube the compressor. That's my guess. It almost looks like the UV dye they add to locate leaks also.

Sucks man, I hate diagnosing A/C stuff.

Do you need the rear climate control?

 

[Leandro]

Is it on the same circuit as the front ac? If not i can just leave it until i win the power ball or something like that.

 

[ton504]

Isn't freon a gas? This is a liquid.
I know where the leak is, is on the line, right where the bracket is.

Damn you got me. It's probably the blinker fluid. Looks to be the right rear from the picture.

But seriously, that's your a/c line and the fluid is oil from the system. The hissing is the freon leaving your system. Looks like you have some rust and the aluminum lines are corroded causing the leak.

 

[Leandro]

is this a DYI kind of fix for someone with basic tools and no AC knowledge?

 

[mogili222]

If it is the same issue I had happen on my LX470 yesterday, it would be rear ac line that is prone to corrosion that is leaking. Mine leaked just behind the front passenger wheel, but yours looks like it leaked in the rear. Will have to replace a 6 foot line to fix it.. a little expensive at around $1500 at the dealer or around a grand at an independent mechanic.

The link below has more details.

LX470 and Land Cruiser air conditioning blows warm air

 

[sean2202]

You can fix this with a copper nickel brake line and a brake compression fitting as I did. I also added a dab of red silicone on the ball and threads of the compression fitting. No leaks in 8 months. Fixed for bout 30$ in parts. Clean those aluminum lines real good with fine sandpaper, use a small tube cutter and make sure it is a clean cut, no burs. I purchased my parts from Napa. Better than$ 1500 or blockin thr rear a/c lines

You will have to rent a a/c leak down tester from autozone or purchase. Not hard to recharge watch some videos on you tube and you will be all set.

This is a repair I did last year with little a/c knowledge at the time. Sorry I didn't take pictures of the process. DO NOT use the compression fitting that is in my original picture as that is NOT a brake compression fitting.

copper nickel brake line for a/c high pressure line?
couple a/c questions​

 

[Leandro]

You can fix this with a copper nickel brake line and a brake compression fitting as I did. I also added a dab of red silicone on the ball and threads of the compression fitting. No leaks in 8 months. Fixed for bout 30$ in parts.
​

i like this solution... especially the $30 part...​

 

[sean2202]

I believe it is 5/16 line. You can also research a company called airsept they have compression fittings and line repair as well.

 

[Leandro]

Did anybody try this?
Dorman 800-673 Air Conditioning Line Splice Kit for 5/16" Line Amazon.com: Dorman 800-673 Air Conditioning Line Splice Kit for 5/16" Line: Automotive
Looks like a viable solution for around $40

 

[Sandroad]

Here is a thread I found with a search on the word Dorman. Looks like it will work fine.

2000 A/C Woes, Fixed!

 

[nissanh]

^^^ as above but instead of using JB weld, use a patch repair rubber and then use a radiator hose clamp to tight it and secure it in place.

 

[elk]

I'm guessing I'm having the same issue behind the passenger front wheel at the line. This morning it's hissing and dripping oil.

 

[gatormark91]

Remove the line and take it to any decent hydraulic hose shop. They can make you a new one, it's pretty cheap. Had to do this with a RX-7 that I had, the line they made up, with the right ends, was better than new.

 

[Leandro]

I'm guessing I'm having the same issue behind the passenger front wheel at the line. This morning it's hissing and dripping oil.

View attachment 1440624

on this post A/C not working 2000 Land Cruiser is the repair i did.
The Dorman kit is very easy to use. You don't need any special tool.
Mine is working great after this fix

 

[elk]

I guess I need to evacuate the line. The fatter 3/4" line is a high pressure line correct?

 

[Leandro]

you don't need to do anything. it will lose all the freon thru the leak.