QUOTE(ulost16 @ Sep 13 2011, 09:12 PM)
Hai bro,
The temperature is going up above the middle bar if the car moving above 80km/h. and it is going faster to one bar below the red bar if I use aircond while driving above 80km/h.
So, If you were in my position, what first you will check?
I plan to go to thermostat first..because it is the cheapest one than the others.
means not fan problem already.
you can check the water flow 1st. start your engine and let it running till the fan start spinning. take out the one end of big hose that connect from your engine to your radiator, the top hose not bottom, preferably take out at the radiator there. open your radiator cap, feed with hose of running water. see the water flow that come out is a lot or very little. if little that mean somewhere have clogged the water flow.
next, you can try take out the thermostat and repeat above steps, if water still very little means got other place clogged up. maybe the radiator clogged up, maybe the water pump not working or maybe inside the block is clogged up.
btw, do you have to constantly top up water at the reservoir tank?
Added on September 13, 2011, 9:35 pmQUOTE(GKWong @ Sep 13 2011, 09:18 PM)
if thermostat jam then the radiotor hose will become bloated or might explode.
when engine is cold. Open up the radiotor cap and start the engine. Monitor the water flow. When cold u wont be seeing much water flowing. After engine warm up awhile, the thermostat should open and u should be able to see the water flowing in one direction.
Try to rev the engine a bit and monitor if the water is suck down to the tank and flows faster or not.
will explode meh? last time mine jammed up partially i think, water flow very little.
dunno can check at the radiator cap, i always take out the big hose, coz also flush the water inside.

but is it can see clearly if the water flow fast or not?
This post has been edited by xxboxx: Sep 13 2011, 09:35 PM