I just notice my engine running liltle bit hot lately, the Temp needle went a bit pass middle about .2cm. The engine run hotter when i got the heater on and a bit cooler when a/c is on. Anyone have any idea what could it be? Any suggestions are welcome. Thanks in advance for the input.

95 SC400 83k
Last 3 month Main:
Trans flush, new coolant and oil change
New spark plug and wires

 

you could have air in your cooling system since you changed the coolant. there are a few ways to get it out or you can drill 2 or 3 holes in the thermostat. that might help.

 

have u tried burping the system?

 

you can burp the system by jacking the front end of the car very high so that the radiator will be the highest point on the whole cooling system.

 

hah or u can just open both fill holes. (on the engine and reseovior) and let the engine warm up. i think thats how u do it.

i just changed my radiator yesterday! and so far my engine is not wet hehe ^_^.. sry for the side note. heh

 

Thanks everyone, I'll try yall methods and see. Another Noob question, my coolant tank is full when the car is off, when i start the engine the engine just suck all the coolant down to nothing left in tank, it filled back up when turn the engine off. Is this supose to happen in SC? Please enlight me.
Thanks

 

Run the engine to normal operating temperature with heater turned all the way to HOT and turn it on high. Do this for about 5 -10 minutes. Let it cool down and then refill the radiator. Repeat about 3-5 times or until the coolant level stays the same. Sounds like the heater coil for the HVAC system might have a bubble.