1HZ Triple flow Radiator in- AAA+++

Yes, a 4 row radiator is a worthwhile mod. Put one in my troopy 3 years ago, and has never even looked like getting hot.
Got mine from Radiator Warehouse, Churchill Rd Kilburn SA.
Was actually cheaper than getting the original 3 row re-cored.
No association etc. just a happy customer.

Cheers
Glenn

HI Howesy.

That sounds exactly like what my troopy does with the temp, can you give me some details of where you got the radiator from and cost etc. would love to know all about it.

Thanks

Luketroop
troopytraveller@bigpond.com

Hi, i have a 79 series and i have the same problem sometimes even with no load on certain hills.
did it before turbo, and no worse since i got turbo.
How much are the radiators? im in south west QLD.
Cheers Chris

I just had a 1hz in Innamincka at 49 in the shade towing a camper trailer, it had a roof rack with 2 tyres on top and run cool as a cucumber with the radiator it came with new.

In the last 7 years I have owned 7 1hz cars, and the only time they when hot and cool again as you say was the viscus hub in the fan, so don't be fool into thinking your problems are solved.

It may be worth checking as well, Just some friendly advice.

Cheers Steve.

I agree - Your temp gauge should not be moving with the factory radiator.

You should not need to upgrade to a bigger radiator - BUT - I agree it is better to give yourself some space when there is a problem given that the Toyota gauge has a huge dead spot.

I would be looking first at thermostat, then fan clutch, then power flushing the radiator, then heater hoses(they can collapse when hot reducing the efficiency of your cooling system).

Also keep in mind that the Toyota temp gauge has a huge dead spot up to 110 degree's C.

So, if your temp gauges are moving - you are getting close to boiling point in my experience as soon as they move.

Never mix different brands of coolant - this causes sludge which eventually blocks up your cooling system - if you do change brands or types of coolant - you MUST do a professional POWER flush - not just use a garden hose which is common with some mechanical places.

I installed a digital temp gauge with an alarm because of this dead spot so that I had some real warning if the temp moved before it was too late. You can get them in the trader section under accessories for under $120 and install one in minutes - but first I would be finding the root cause to your cooling issues - which I suspect are fan clutch related - they generally go around 150,000k's and resemble the problems you guys are describing...

Toyota ones are serviceable. You can buy the Silicon based oil from Toyota and refill them - much cheaper than buying a new one from Toyota at $500 roughly - there have been plenty of reports that only Genuine stand up to the requirements of landcruisers and the third party ones fail more - they are not serviceable either.