SleeplessEyes is absolutely right. bypass the thermostat ,ay solve overheating problem, but it is not a practical solution.

kancil overheating is a very common problem. this is due to;

- design of bumper/fender/front bonnet are not air flow friendly.
- the engine bay is compact, hot air cannot flow out from the bay easily
- kancil thermostat has very high heat tolerance (this is due to the design and it's DESIGNED THIS WAY)

There are a few ways to resolve this problem. I've arranged it from a cheaper to a more expensive solution

- by pass the thermostat (pls understand the consequences before doing this)
- perform 1 round of radiator cleaning, then flush the tank every month.
- get a thicker radiator from chopshop (ask for a radiator from mira turbo AUTOMATIC)
- replace to a bigger/more powerful fan. brand new fan recommended.
- change the entire bumper/fender/bonnet to Mira L2/L2s/L5; beware of JPJ. Do at your own risk!
- custom make a 3-core copper radiator.

Quote from the URL above: "After a few days drive, scale and rust will appear on top of the cooling reservoir."

I'm puzzled how rust can float?