Originally Posted by AzSpeng

On the topic of a pressurized tank, I along with millions of people probably feel the same way about things big companies do in terms of engineering or product manufacturing. Just because they put some thought into it doesn't mean it was the right idea to move forward on. We dont know the true reason they changed the design of the tank, I am all for doing some testing to figure out what the true pressure reaches inside the oem car with oem pressurized coolant reservoir and then coming up with a solution from there.

There has to be a concise reason why the tank design changes from a non pressurized, to a pressurized. The reason might not be a good one but there is a reason for sure! Lets work together to figure out what that reason is and if it has a direct impact on the performance of the car in any way.