Originally Posted By: Wrenchman798
Was the cooling system disturbed at all? I know you said you did not replace the water pump. But was the coolant changed, drained or is it possible someone else drained it partially who did not know there was no need to? Thermostat? How about rad fans? Was the wiring disconnected?
This is what I was going to say too. It’s possible that somebody working on the car assumed the water pump was getting replaced too since it’s such a common pairing to do both at the same time. Maybe they drained the coolant, realized they didn’t need to, and poured coolant back in it without burping all the air out of the system. This seems like the most likely scenario to me by far, because otherwise nothing about the timing belt change itself should cause overheating.