Help - FJ60 Rear Heater hoses leaking under truck

[Boicruiserloser72]

I've have found numerous threads on deleting the rear heater in the Land Cruisers, but I'd like to understand the why. Mine has begun leaking JUST as Fall weather and temperatures have arrived. I'd enjoy driving the 60 this Fall and Winter, and the rear heater really helps warm the whole interior. Can it be repaired easily? I haven't taken anything apart yet. Just beginning to research and haven't found any info on replacing the hoses. Only finding delete information thus far.

 

[klinetime574]

A lot of people don’t use it or want the storage space underneath the seat (FJ60). I’ve never used mine, but I did replace the hoses a number of years ago. If it is just the two hoses that is an easy fix. If the heater unit itself is faulty you’d need to find a new (if even available) or used replacement. HTH

 

[Boicruiserloser72]

A lot of people don’t use it or want the storage space underneath the seat (FJ60). I’ve never used mine, but I did replace the hoses a number of years ago. If it is just the two hoses that is an easy fix. If the heater unit itself is faulty you’d need to find a new (if even available) or used replacement. HTH

Thank you for the reply. That is helpful! The heater itself does not seem to be leaking (so far). It seems the leaks are where the rubber hoses are clamped onto the metal tubing visible from under the truck.

 

[MWM1]

I have kept the rear heater intact and often run only that one in winter. For the hoses, look at the follow thread post #17 and you will see the U shaped hose part numbers.
Good Luck!

C

Thread 'fj62 / 3fe cooling hose diagram ?'

Jul 6, 2018

Does anyone have complete diagrams with part numbers for cooling hoses on the fj62 with 3fe. I'm scratching my head trying to figure out what goes where. I've tried searching and i own the 1988 toyota repair manual pub RM080U and it doesnt help

Did water pump / thermostat / new radiator and oil cooler hoses. Thanks!

• captain pabst
• Replies: 43
• Forum: 60-Series Wagons

 

[Boicruiserloser72]

I found some helpful diagrams on Spector Off Road's website, and will conduct some troubleshooting and inspections before I disassemble the rear heater. Upon closer inspection, I see there is a valve within the rear heater. I switched the valve to "COOL" in the meantime. However, I can see some visible coolant within the rear heater. I may be facing a rear heater delete after all.

FJ60 and FJ62 Heater box, air duct, hoses, heater core, blower, and valves - 8/80-1/90 Land Cruiser - Specter Off-Road

Toyota Land Cruiser parts since 1983. From the oldest FJ25 and to the newest Land Cruiser, Non USA or domestic 40 Series, 60 Series 80 Series or 100 Series, SOR has the largest selection of top quality new and used OEM and aftermarket Land Cruiser parts in stock in the world. Specializing in...

www.sor.com

 

[DrRock]

I have my under seat heater and actually use it in the winters here in the Northeast. The interior size of a 60 definitely benefits from additional heat but that said mine is in great shape without any leaks. Good luck with your decision.

 

[S.CarolinaFZJ80]

Pull the heater and take it to a radiator shop. They can repair the leak(s) and pressure test it. Then get some new hoses.

Gates 18453 work great for the 60 rear heater. They have a similar curve to the original hose that is NLA

 

[3_puppies]

the metal tubes are delicate
DO NOT USE WORM DRIVE CLAMPS
easy to overtighten and distort the tube

 

[Boicruiserloser72]

Pull the heater and take it to a radiator shop. They can repair the leak(s) and pressure test it. Then get some new hoses.

Gates 18453 work great for the 60 rear heater. They have a similar curve to the original hose that is NLAView attachment 4009458View attachment 4009459

I like this plan best.

 

[Boicruiserloser72]

I like the idea of taking it to a radiator shop. A local FJ60 owner had his for sale here in Boise, and I picked it up too. I'll likely take that one in first and have it pressure tested before disassembling mine. Mine does not seem to leak with the rear heater valve closed in the "COOL" position. Where were the "Gates" hoses purchased? Thanks!

Edit: Easily found the Gates hoses on Amazon. Disregard

 

[Boicruiserloser72]

the metal tubes are delicate
DO NOT USE WORM DRIVE CLAMPS
easy to overtighten and distort the tube

Noted! Thanks for the info!

 

[Spike Strip]

I like the idea of taking it to a radiator shop. A local FJ60 owner had his for sale here in Boise, and I picked it up too. I'll likely take that one in first and have it pressure tested before disassembling mine. Mine does not seem to leak with the rear heater valve closed in the "COOL" position. Where were the "Gates" hoses purchased? Thanks!

Edit: Easily found the Gates hoses on Amazon. Disregard

Does not leak in cool position because that slide valve shuts off coolant flow to the small radiator in that housing.

 

[EscapeWagon62]

Love this thread.
My hoses aren't leaking yet but I know it's just a matter of time.
Gates 18453s inbound!

 

[Boicruiserloser72]

Does not leak in cool position because that slide valve shuts off coolant flow to the small radiator in that housing.

Excellent point Spike Strip! On that note, the radiator shop owner told me the valve can often be the culprit of a leak in the rear heater core assembly. While the valve is likely not available, he offered that the valve could be deleted from the heater core, and an exterior valve (maybe under the truck) could be installed as a "seasonal" valve if I was set on retaining the heater under the seat. I'll post more after the heater core is evaluated and I hear from the radiator shop.

 

[Spike Strip]

Yes, I deleted mine cuz the valve leaked.
Very easy to install any kind of a valve in line to shut it off when not needed.

 

[MWM1]

the metal tubes are delicate
DO NOT USE WORM DRIVE CLAMPS
easy to overtighten and distort the tube

Yeah, I found out the hard way. Just trying to pull the old rubber hose off crimped the brass tube. On my second core, I carefully used an exacto knife to cut off the old hose. Seriously the brass tubes are tissue paper!

 

[S.CarolinaFZJ80]

Be careful with an exacto. Those brass tubes are soft and if scraped might leak

 

[MWM1]

Yea, I stopped short and had to tear the rest of the hose apart. Brass is clean as a whistle buts it’s so nerve wracking! Also snug on the wire clamp is plenty!

 

[Boicruiserloser72]

Since my last post the rear heater core began leaking badly. I was forced to park the 60 and remove it. After removal I found that is likely the slide valve that has failed. For the purpose of education I've attached photos of the rear heater assembly.

Using a fresh utility knife blade, I carefully cut through the hoses. First, I cut away the bend, only leaving what was clamped to the steel tubes and brass tubes of the heater core. Being careful not to crimp the brass tubes, I tried briefly to unscrew the worm drive clamps with a 1/4" drive ratchet , but they didn't want to budge. Steel bands were used to secure the hoses on the steel tubes. I opted to cut through the bands and worm drive clamps with a 1" diameter dremel cutoff wheel. Using the utility knife, I then sliced down the lengths of each hose piece until they peeled away by hand.

I found antifreeze in the carpet padding and along the floor from the right, rear wheel well all the way up to the right front firewall. So, everything is opened up and drying out. What a pain...

I'm planning on a 5/8" flexible hose to simply connect the steel tubes and bypass the heater core until I learn if it can be fixed.

 

[Boicruiserloser72]

Underside of rear heater assembly.