Hi,
Is there evidence of coolant on the passenger's side floor or anything inside the vehicle? The heater core can be leaking, or you could simply have a hose to the heater core leaking.
What I would recommend is to pressure test the vehicle. This is done when the engine and coolant are cool, so it is a lot safer.
Here is a link that shows how it's done:
https://www.2carpros.com/articles/radiator-pressure-test
Is the engine overheating because it becomes low on coolant? Also, does it overheat at highway speeds, or does it seem limited to stop and go traffic? If it is stop and go traffic, pay attention to see if the radiator cooling fans are running when it starts to overheat.
Let me know what you find.
Take care,
Joe
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Thursday, July 18th, 2024 AT 7:59 PM