60 Series Overheating (Fan clutch)

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60 Series Overheating (Fan clutch)

Unread post by tonka60 » October 22nd, 2006, 11:08 pm

Just trying to get some opinions on what the **** is going on with my cooling system. Vehicle- HJ60 1983 60 series landcruiser 2H engine.

The temp gauge is showing needle just below red section when traveling 100kph and above especially in the outside temperatures lately! The radiator is less than 24 months old and there is no leaking fluid anywhere nor loss of, no bubbles in radiator, oil clean. So i did the cheap to expensive trick:

- changed the coolant type to jap spec genuine (the old coolant was aftermarket and was completely clean and the a flush presented no gunk) No change in temperature.

-changed the thermostat to new genuine. Still no change.

-I am now about to change water pump (not leaking but may aswell change it), belts (while i'm at it), hoses (why not).

-more than anything i want to know about fluid coupling fan clutches, i know how they work. I want to know if anyone has changed one to solve this problem and it actually worked.

-the only other thing i can think of is the temp sensor unit off the thermostat housing???

HELP! this is getting frustrating!!!

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Unread post by ravofireman » October 23rd, 2006, 7:40 am

dude,, Is the radiotor clean???

When my nav starts to get real hot i know i gotta get the hose on t he raditor cause it is clogged up with mud and crap,,
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Unread post by Reddo » October 23rd, 2006, 7:48 am


had the same problem with my 2H and replacing the fan/thermo clutch unit fixed it. The clutch should be free to move when cold, no resistance to free-wheeling, and very sitff/locked up when hot. Usually they get stiff cold as the fluid inside leakes out and slip when the engine is hot.

Also, how accurate is you guage? Is the radiator actually boiling over? If not your guage may be reading wrong.....

Another issue may be blocked coolant galleries inside the engine. Difficult to deal with but some sort of radiator flush may help here.
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Unread post by 4low » October 23rd, 2006, 7:51 am

Yeah I know its frustrating, im still trying to solve the mystery of why my fan doesnt ever turn off!! Im not getting any overheating at all, all works fine, except for the fan and it really is annoying. My brother had a lot of overheating issues with his bravo and did all the things you have, changed the radiator 4 times (tried copper, aluminium and everything else possible), the aluminium one eventually worked. He also changed his thermostat, sensors, hoses, you name it. Its all fixed now though. We had to go to 3 different radiator specialists as seems no one had the answer, but eventually was fixed after a heap of $$$$. Try seeing one they might be able to find the problem for you
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Unread post by tonka60 » October 23rd, 2006, 8:26 am

I'm still pretty convinced its the fan clutch, will find out today i suppose. Has anyone ever changed the fluid in one with any success?

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Unread post by 3F62 » October 23rd, 2006, 8:38 am

I've added the silicone oil to mine & worked a treat, few mates have done the same. Toyota part No. 08816-10001 for a 18 ml tube ?? $14.......

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