my 2007 proton lmst started to show some overheat issue.
It is observed recently after service, changed the distributor seal and the top seal (the one covers the valve heads ?) and some adjustment on the timing. Not sure if any of this related.
Aircond performance seems drop during hot noon hours. Bring to workshop to check air cond, pressure is enough and no other problem and coz the system working well. They say maybe recently hot weather, then i ok lo.
i found out that during hot noon hours, if i stuck at traffic jam with with aircond fan and turn to max, the air does not get cold, After a few stop and goes (rev up and release clutch few times), for few minutes, the water temperature bar will rise to 4 bar. When this happens, i tried to rev as low as i could to get the car moving and it cools down to 3 bar once i manage to hit a long straight, and aircond starts to cool.
Now i m suspecting the car slightly over heat causing the air cond to perform bad also, since the condensers are nearby and releasing heat. Car cooling system is ok also, fan will turn when reaching certain temp, coolant is enough.
And advice? think i should target and service the cooling system? like flush? i am kinda sure the rising to 4 bar is not normal lol.
add extra ground cable at the back of your meter, Temperature gauge will be back to normal. Lmst had this problem, is normal. Unless your both radiator and air cond fan not working.