To help the CCV last longer, and also the engine, while using the OE CCV setup, here is what I do (we have really long & cold winters):
- Once the temps drop below freezing have a cardboard placed in front of the radiator
- After the car is started, turn the heating off, turn Test #7 on to see the KTMP. Drive until the KTMP reaches 85°C (or better, if you can hold on). KTMP will climb really fast with the heater core turned off. Once you have more than 85°C, you can turn on the cabin heat. You will see a 10°C sudden temp drop (or better), but the bulk of coolant reached higher temps, and it will warm up really fast
- have the vehicle garaged at all times if you can help it during the cold months. I have a garage, and at work it's parked in an underground parkade, which helps a lot.
I'm on the same cold climate CCV (including re-designed dipstick guide) since February 2008. I will prolly need a new kit soon (preventative) - I don't think that rubber membrane of the CCV lasts forever. But only 2 or 3 years out of a CCV is too short.