LC 80 overheating petrol

go see your friendly Tojo dealer next week and get some silicone fluid to add to the thermo unit.
do a search on silicone fluid and you'll find the part numbers.
also have a look at lcool forum there some info there as well.

Hi Steve, if the fan clutch is low on fluid it is probably due to a faulty seal or bearing ,putting more fluid in will be a fairly temporary repair, also some clutches are factory sealed. The fan clutch for an 80 series is around $135 non genuine, on something as critical as the cooling system I would just replace it.
Regards Ken.

Hi Steve,
That was my reply you stuck on the end of your question, when my 80 series was overheating, I fixed it myself for about 20 bucks. I'm not sure how mechanical you are, but to fix it, it was about a one hour job & two tubes of silicone. There is only a couple of tricks, on the diesels (not sure about your petrol) when removeing the fan & coupling, the fan shroud needs to come out as well, also you may need an impact driver to split the two halves of the coupling. One other thing is, do not wash out old silicone once the two halves are split, simply add the two new tubes to the existing silicone. It was mentioned earlier that adding the silicone is a tempary fix, well I fixed mine two years & 80,000 k's ago & still going strong towing my camper all over the place, definately don't go & buy a new coupling, when I priced them even the after market jobs were over $200. At the end of the day, if your not confident doing it yourself, take it to a mechanic you trust & get them to do it. If you have any other questions gjgrant@hotkey.net.au

Regards, OM&M.

Try here
www.off-road.com
The part numbers for the silicone has changed but your toyota dealer should be able to get it easy.
I have done several and had no problems.
I would suggest to do it by the book as I have heard that they can disintergrate if you put too much silicone in.
120scruiser

Hi Steve,
I have just read an article on cooling problems on 80 series, (Caravan & Motorhome No 74 - June 2005).
They replaced all the following parts with new Repco parts, for $1015 plus a day to fit them :
Heavy Duty Radiator (new, not re-cored), Water Pump and gasket, all the fan belts, all the hoses, Hydrostatic fan clutch assy, t/stat and radiator cap.

Regards
Neil

I had exactly the same problem as you and fixed it by adding a tube and a bit of silicone. It is easy all you do is undo your shroud (removing it isnt neccessary but makes the job easier then there is 4 bolts holding the clutch assembly on - no belts need removing. you then sepperate the fan from the clutch and seperate the 2 parts to the clutch YOU MUST USE AN IMPACT DRIVER FOR THIS PART. It is then simply a matter of putting in as much silicone as you can and reversing this procedure to refit

A friend of mine changed the usual list of things to no avail, and in the end, i gave him an electric fan to supplement the mechanical one....he proved that it was the mechanical clutch causing the problems when he turned on the electric one, as the temp went straight back down.....but he wont give it back as it makes his air colder.....
Andrew