Radiator, Heater, Transmission Cooler Hose Preventive Maintenance

[hoser]

The LX is at 105k and 9 years old. Very mild California weather though. I'm getting ready to change all the radiator, heater and possibly transmission cooler hoses. Here's a part list from Cruiserdan. Would also need hose clamps. What is the official (if there is such a thing) recommended interval for changing transmission cooler hoses?


Quantity/Part Number/List Price/Description

1 16572-50150 $21.32 Lower hose
1 16571-50150 $14.82 Upper hose
1 16261-50090 $5.38 Bypass hose
1 87245-6A190 $20.01 Hose, Water
1 87245-6A170 $14.35 Hose, Water
1 87245-6A220 $13.60 Hose, Water
1 87245-6A180 $12.38 Hose, Water
1 87245-6A210 $9.60 Hose, Water
1 87245-6A200 $17.23 Hose, Water
2 99556-20200 $5.94 Hose, Water
2 87245-6A090 $17.92 Hose, Water
1 16401-67150 $13.00 Radiator Çap

1 90445-17103 $12.06 Trans oil cooler outlet hose
1 90445-17097 $16.06 Trans oil cooler rear inlet hose
1 32943-60210 $47.59 Trans oil cooler - Oil hose
1 32942-60290 $57.07 Trans oil cooler - Inlet hose
1 32941-60190 $45.87 Trans oil cooler - Outlet hose

The smart shopper price for all the above is $276

 

[100 TD]

I did my fathers fuel evaporative and overflow hoses at 10 years, all the ones down at the tank, when he filled the car, fuel would leak as they had all started to crack. I would be doing all those as well as the ones under the hood, as well as your diff, tranny, transfer breathers and vacuum hoses. The oil cooler hoses on the tranny and PS pump may last longer, but if you do them all now together, then you know where you are at. I expect if you just purchased some hose for the evap off a roll, as well as the vacuum hose and possibly oil cooler hose it may be a bit cheaper than buying individual hoses from toyota.

 

[Jim_Chow]

On my '86 4Runner, the only hoses I've replaced are the radiator hoses. The heater and PS hoses are all original, as are all the vacuum tubes. Replacing all hoses on the LC after 100K mi is kind of overkill, IMHO.

BTW, for the ATF cooler on the 100, one hose is at the top and one at the bottom. Does the hot ATF enter at the top and cool ATF exit at the bottom and go to the ATF pan?

 

[hoser]

Yeah, I think I am just going to change the radiator/heater hoses. Like CDan said, the transmission hoses are more of repair item than maintenance.

But, good thinking on the hot/cold ATF hoses. The cold could probably outlast the hot near 2:1.

 

[Jim_Chow]

The only OEM hose I've ever had leak is the top timing cover hose on my 22re after it exits the bottom of the radiator and enters the cylinder head. It's due to the extreme heat from the aftermarket header at cylinder #1. That hose only lasted 60K mi. Before the header install, the original factory hoses lasted 15 yrs and 125K mi w/ no issues before being changed.

The ATF lines underneath the vehicle in front of the right-side coolant drain bolt are metal.

 

[SWUtah]

On my 99 LC I replaced all of the rubber hoses and belts in the engine bay. It was a AZ LC and the timing belt was cracked at 58K miles from the heat that they get in southern AZ. All of the hoses and belts needed to be changed. The up side of the AZ LC is that it looked new underneath (NO RUST). If you have a LC/LX that has spent its life in the midwest or north, I doubt you would ever need to change anything other then the drive belts and the Rad hoses.

 

[Jim_Chow]

On my 99 LC I replaced all of the rubber hoses and belts in the engine bay. It was a AZ LC and the timing belt was cracked at 58K miles from the heat that they get in southern AZ. All of the hoses and belts needed to be changed. The up side of the AZ LC is that it looked new underneath (NO RUST). If you have a LC/LX that has spent its life in the midwest or north, I doubt you would ever need to change anything other then the drive belts and the Rad hoses.

You only got 58K on your t-belt, or are you referring to the serpentine belt? My serp belt only lasted 48K. I recently had the belts on my 4runner replaced; got about 50K out of them. Dealer says the t-belts on the 2UZ seem to be lasting 105K in Tucson.

 

[SWUtah]

You only got 58K on your t-belt, or are you referring to the serpentine belt? My serp belt only lasted 48K. I recently had the belts on my 4runner replaced; got about 50K out of them. Dealer says the t-belts on the 2UZ seem to be lasting 105K in Tucson.

My 99 LC had the timing belt and water pump and all other belts and hoses replaced at 58K miles because it was past the time limit for replacement and also the bad condition of the serpentine belt made me worry about the timing belt. It's a good thing that I had it done, the timing belt was in bad shape and the water pump was starting to weep. I think AZ heat is really really really hard on the timing belts and all the rubber belts and hoses. If you live in the really hot states you need to use the time guidelines as well as the mileage guidelines that Toyota/Lexus recommends. I did this in October of 2005 when my 99 LC just turned 7 years old.