prado heating problems, changing a thermostat

[bechoril Lurker Find all posts View Profile Close bechoril]

hi folks,

i am driving 2002 prado diesel with 135000 km (only), i am having a problem with the engine temperature.
the needle shows almost minimum most of the time, and after a tough uphill climb it can reach the normal heat point but only for a short time.
in addition, the heater in the car is barely working, and starting to push lukewarm air only after 20 min drive, i also mentioned that the fuel consumption is bad, somewhere around 1:7 (liter:km).
after consulting with some folks all said i need to replace my thermostat...
i am wondering if somebody here have a tutorial or any other helpful knowledge of how to do it.
i assume it should be on the bottom big house, but, before going ahead i would like to know how complicated is it and how many additional parts should be removed before getting to the thermostat.

thanks in advance.

cheers.

[scottkz Senior Member Find all posts View Profile Close scottkz]

hi folks,

i am driving 2002 prado diesel with 135000 km (only), i am having a problem with the engine temperature.
the needle shows almost minimum most of the time, and after a tough uphill climb it can reach the normal heat point but only for a short time.
in addition, the heater in the car is barely working, and starting to push lukewarm air only after 20 min drive, i also mentioned that the fuel consumption is bad, somewhere around 1:7 (liter:km).
after consulting with some folks all said i need to replace my thermostat...
i am wondering if somebody here have a tutorial or any other helpful knowledge of how to do it.
i assume it should be on the bottom big house, but, before going ahead i would like to know how complicated is it and how many additional parts should be removed before getting to the thermostat.

thanks in advance.

cheers.

Thermostat is under the turbo on the block easy to get to
Put a thermostat in from a KDJ120 08 model

[clarkie383 Member Find all posts View Profile Close clarkie383]

Why scottkz?
What is the original thermostat temp on a 90.

[scottkz Senior Member Find all posts View Profile Close scottkz]

Why scottkz?
What is the original thermostat temp on a 90.

Std 90s are 88 or 86* while 120 with the 1KD are 71*
Means the coolant dosnt get as hot to start flowing through the engine

[bechoril Lurker Find all posts View Profile Close bechoril]

scottkz, to be honest i didnt get the reason to install a smaller thermostat from 120.
also, in case i will decide to do this in a local Toyota re seller garage, i am afraid they will not agree to use different parts.
suggestions, clarifications?

[scottkz Senior Member Find all posts View Profile Close scottkz]

It is identical in every way except it's a different opening temp
There's no modifying at all

[bechoril Lurker Find all posts View Profile Close bechoril]

isnt the opening temperature critical to the engine operation? currently i suspect that my fuel consumption is high due to the low operation temperature of the engine.
what is the advantage of reducing the opening temperature?

[scottkz Senior Member Find all posts View Profile Close scottkz]

Na not this little difference
Mines been like it for 30k now and my old 3.0l surf i racked up nearly 100k in it

[Ken in Cairns Junior Member Find all posts View Profile Close Ken in Cairns]

I would also check the clutch fan a lot of times they are empty and don't work correctly and they can be overhauled for 22 bucks, you need two 11cc tubes of 10,000 Centistoke oil from Mr T
see this links about how to do it, and set the operating temperature up correctly.

http://neuralfibre.com/paul/4wd/tuni...ous-fan-clutch
another link here

http://www.offroad80s.com/how-to-top...mod-t1160.html

Hope that helps

[pradoski Lurker Find all posts View Profile Close pradoski]

I seem to be having the same problem with my 98 Prado.
How do I locate the thermostat?