High temperature even after thermostat replacement

Hi, So my 1977 450SL started running at high temperature close to 212F when the AC is on about a month ago. I flushed the coolant and replaced it with new one (blue) and replaced the thermostat (75C). However, the temperature still goes close to 212F. If the AC is off the car sits at around 200F. Please note that the weather temperature here ranges from 86F to 113F. Thanks

Hi,

So my 1977 450SL started running at high temperature close to 212F when the AC is on about a month ago. I flushed the coolant and replaced it with new one (blue) and replaced the thermostat (75C). However, the temperature still goes close to 212F.

If the AC is off the car sits at around 200F.

Please note that the weather temperature here ranges from 86F to 113F.

Thanks

---------------------------------------------------------------------------
Visit this link to stop these emails: https://zpr.io/t5iAW