I found when I drive in slow traffic or stop at traffic single longer the temperature gauge rise one bar from the middle ( I never allowed to rise more than 1 bar and always turn AC or heater on to lower). I checked both fans spins when it start to rise and become normal (in the middle) as soon as I open the bonnet, turn AC on or heater. It also comes to normal as soon as I increase the speed.

I owned other cars and never see the temperature gauge fluctuate this much.

Please let me know if this is normal behavior in Magna or something wrong in engine or radiator.

Thanks

Once warmed up, mine stays one needle width under half way under any and all conditions.

It might be a good idea to investigate yours further.

Check if you have a leaking heater core, and for coolant leakage inside the car that drops onto the passenger side carpet.

More information:

http://www.aussiemagna.com/forums/showthread.php?t=106127&highlight=heater

If this is not the problem, ask your friendly local mechanic for a simple and inexpensive "leakdown test", which is good for identifying cooling system problems.

What do you call normal. You are stating that your temp goes to 1 needle from the middle, where is it when you say the temp is normal

it stays in the middle after warming up.
I also ran the heater for 10 min can not see any leak under passenger glove.

Start with Thermostat, use genuine one.

Even if heater is leaking would have to be gushing out to get that sort of temp issue

Can also be a blocked radiator depending on condition of the cooling system

I check with mechanic this weekend.
I observed temperature rises even the aircon is on, but it never goes up more than one bar. As soon as car move, it goes down.

If the radiator isn't kicking out coolant into the overflow bottle a few minutes after a serious drive the car probably isn't overheating.

I had a similar problem, with both fuel and temp gauges fluctuating with engine RPM, turned out a 5V regulator on the back of the instrument cluster not doing its job. Probably not your problem, but it is worthwhile remembering the gauge may be telling lies.

I never noticed before it looks like it started after I changed rocker cover gaskit and spark plugs. Before there was too much oil leak from both covers, now it stopped. He also applied silicon in air suction area to stop air leak.

If a MECHANIC applied silicone to any part of the engine bay, shoot him, run him over several times, dump the body and then look for a new mechanic

If a MECHANIC applied silicone to any part of the engine bay, shoot him, run him over several times, dump the body and then look for a new mechanic

Here Here!

Here Here!

. . . . spelling fail.

Nah, he's just saying "kick it to me, kick it to me".

Within the context of the preceding posts . . . "hear, hear" would be more appropriate. But, yeah, u knebber kno!

(spam post - I better ban myself for a week. Bye!)

took it to mechanic, he thinks it is thermostat. he checked the upper hose and for just 2km driving it was building lot of pressure.