Hi guys, I have this problem whenever I drive the car in the traffic and in daytime.

The aircon is not very good, it can generate small amount of cool air, but there is a big difference in the cool air that coming out if you are driving in night time and you can feel that the engine is so hot that even my leather seats feels hot. However, the engine temperature in the dashboard is still in the halfway point. It really does feel like sauna if you are trapped in the traffic in daytime.

Even after I let the car to cools down for 2-3 hours, when I open the radiator cap, I can still feel a small amount of hot steam coming out. Is this normal?

I am basically running on 100% prestone antifreeze coolant. Is this the reason because I am not ysing the correct solution for the coolant? I am also running 5w30 as my engine oil.

Is there any tips?

 

https://www.rx8club.com/series-i-tec...stions-225734/

 

While this is a bit of a better place to ask this question to begin with, please don't spread your questions about problems through multiple threads. It makes it hard to track the issue and what is being worked through to solve it.
Next time an even better place would be in the Tech forums. There are a lot of people in the US that have experience with hot weather issues. It may not receive the attention that it would in this or the other location.

 

several quick tips. One, do not run 100% coolant, 50/50 is the highest concentration.

second, read the $100 thread, do the cooling mods. Foam around radiator, fans on low.. Then see how things work. The rest of the mods are good too.