When to replace water pump, thermostat and coolant

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.

 

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.

 

Yep. Parts when they fail but I usually like changing coolant at 100k

 

I don’t go more than 5 years on coolant even if I don’t have a lot of miles.

 

I go with coolant at 35-40k or 3 years, thermostat same, water pump 100-120k. Maintenance is key and the cooling system is critical. Replace your radiator cap about every 2-3 years too.