You are very welcome.
Okay, since the problem happens when you are driving slowly and in stop and go traffic, that tells me the cooling fan isn't doing its job. Yes, the radiator could be an issue, but since it doesn't do it at highway speed, I am confident it is a cooling fan issue.
When you are driving fast (highway speed) the air flows through the radiator much faster, keeping it cool. In town, the air flow isn't there. As a result, the cooling fan must take over and draw outside air through the radiator. If it doesn't work, the engine will heat up.
Let me know if you have other questions.
Friday, August 8th, 2014 AT 8:56 PM