Coolant Still overflowing

[Steve Tinker]

^^^ ^^^
Especially when its such a pig to change out.....
Sometimes easy stuff to replace like the ignition switch, drop links, brake pads, fuel filter, etc, etc, you can get away with installing after market or alternative parts, but when the installation can take hours and/or the replacement parts are so important that the well being of the car can be compromised, the genuine Porsche approved bits are the best bet by far.

[brewerbry]

I et th knock off tank is the issue - it was for me. If anyone does switch out their tank, I recommend using the vacuum tester on the tank before you install it just to be sure you have a good tank. I simply duct taped all of the hose ports, fit the airlift and applied a vacuum to make sure it held 20 psi vacuum.

After verifying a good tank, removing the recently installed leaky knock off tank and installing a verified good tank, I do not have any leaks, steam, or overflows.

At the end of the day, all is good but I wasted the money on the cheap tank and wasted 3 hours installing and removing it. Not worth it.

[redeye280z]

I know the knock off tanks are problematic but I did the vacuum test and it held the pressure fine. I even left it overnight and there was no leak. Could it have developed a leak only after the fluid became hot?

[JFP in PA]

Originally Posted by redeye280z

I know the knock off tanks are problematic but I did the vacuum test and it held the pressure fine. I even left it overnight and there was no leak. Could it have developed a leak only after the fluid became hot?

You are overlooking the fact that because of the way it is designed, it can hold vacuum, but not necessarily pressure.