When to replace water pump, thermostat and coolant

[LoterGarry]

Like the title says when do you guys recommend replacing the water pump, thermostat, and coolant.
I’m currently at 144k miles and have not had any issues. Just trying to be proactive.
Thanks.

[LanestIo]

When your water pump starts leaking. I did not know that mine was leaking until after an oil change, sometimes you have to remove the skid plate to see if you have any crusty coolant on the bottom of the engine.

[Sanidly]

I changed mine at around 100k since I was already doing the timing belt. The water pump looked fine but I figured better to swap it while everything was apart. I also flushed the coolant and threw in a new thermostat for peace of mind.