coolant change 2011Cayenne Diesel

[dougg996]

I have read on some forums that coolant should be changed every seven or eight years despite manufactures claim that coolant lasts the life of the vehicle.

Anyone have informed opinion on this? Also is it essential to use the vacuum device to refill, or can you refill straight into the coolant reservoir?

[Ron986]

|I have been strongly advised by my Porsche mechanic (supported by another VW mechanic) to change the coolant in my 14-year-old GT3-1 asap.... an associated Renntech post listed 8 yrs as a recommended interval between coolant flushes.

[JFP in PA]

2 hours ago, Ron986 said:

|I have been strongly advised by my Porsche mechanic (supported by another VW mechanic) to change the coolant in my 14-year-old GT3-1 asap.... an associated Renntech post listed 8 yrs as a recommended interval between coolant flushes.

 

Coolant is a lot like oil, you need to collect data on it (pH, clarity, freeze point, etc.) to know when it is on it way out.  Realistically, we don't let customer's cars get much beyond 5-6 years, unless our test data tells us it is time earlier.