[KevinH1990]

I replaced mine about a month ago at 84,000 miles. I did not replace the thermostat. I've seen a range of mileage for failures, and you are in the range. Mine just started making a grinding noise when I stopped the car at the end of my driveway to pick up the mail. It could have been much less convenient. I think you are smart to do it now. Consider using an Airlift tool to fill the system if you DIY. See this video: Uview Airlift Kit 550000 Demonstration, Pressure Test, Coolant Fill - YouTube

Now that I've done one, I could do it again in about 3 hours.

I ordered a water pump, gasket and 3 gallons of coolant from Sunset Porsche. The cost breakdown was:

Water pump: $268

Gasket: $7.71

Coolant: 3@$27.93 - $83.79

Shipping: $46.24

Total: $406.45

There are good DIY instructions on Pelican and Pedro's Board. Pedro recommends loosening the front engine mount to access some of the bolts. I did not find that necessary.