Is it a good idea to replace the Coolant Temp. Sensor, the one used by the PCM, when doing a Water Pump replacement? I am changing the water pump and Opti. Anything else you would recommend replacing while I'm in there?

 

You can replace the temp sensor but if it aint broke then why fix it? If your milage is real high might want to change out your timing set. Just cause ur doing the opti and water pump anyways.