I had a chance to compare some the internals of some different fan clutches whilst tracking down the overheating in the cruiser.
Whilst I can’t actually dyno the behaviours, the pics below tell a story.
The operation of the OEM clutch is explained here - http://neuralfibre.com/paul/4wd/tuning-and-understanding-your-toyota-viscous-fan-clutch
As the pics below show, the OEM clutch has far more coupling rings, more surface area, a better adjustable valve system, and more fluid. The aftermarket is a Daikin unit. Read more... (129 words, 6 images, estimated 31 secs reading time)
I wanted to fit a winch 
to my ‘98 HZJ105 without wearing a huge weight penalty, or spending too much money. That ruled out walking into ARB and handing over the Credit Card for a new Bullbar and Warn. It meant I had to DIY this little exercise.
I wanted to keep the weight down, so decided a 9500lb was smaller and lighter than a 12,000lb. If I needed more pulling power, I would use a pulley block. Read more... (935 words, 11 images, estimated 3:44 mins reading time)
Landcruiser or Hilux overheating? Your factory fan clutch is probably under-filled and incorrectly set from factory. Fix this first and you may save a lot of time chasing issues.
The stock Toyota cooling system can sometimes be somewhat marginal. The suspicion for this falls on every component and modification in the system. Read more... (1323 words, 17 images, estimated 5:18 mins reading time)
- Radiator (Size / Efficiency)
- Thermostat (Brand / Effectiveness)
- Water Pump (Flow, Cavitation)
- Radiator Cap (Quality, Pressure, Leaks, Recovery)
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It’s fairly common knowledge that the OEM Toyota temperature gauge has a large “dead spot” in the centre of it’s range. This spot is deliberately engineered to reduce the apparent fluctuations and make the car appear to run at a constant temperature unless there is a significant problem. This works fine for most, but those of us that like to know what’s going on sooner rather than later demand a little more detail. Many people fit an aftermarket gauge somewhere in the car, I figure, if the factory gauge is already there and can be made better, do that. Read more... (733 words, 62 images, estimated 2:56 mins reading time)
