Had a failure in the coolant system with no warning (no lights, temp spike, etc.). Just started smoking and shut it off. Looks like we might have dodged the worst case scenario as heads and block look tight on first inspection. Looks like the coolant outlet pipe failed and dumped everything pretty quickly. Replacing that and also replacing the water pump and thermostat (again.) For reference ours has had many of the small leaks fixed in the past including crossover, y pipe, pretty much everything, or at least I thought. Any opinions if we should do any other service while it is all opened up? We have a '15 at ~75k miles and want to keep her for a long time to come.