I had a working watercooling system in my 61 mm Lst2 truck. It works real good cooling your motor but for the ESC it's not. My motor 1527 1D started
out with 140 but with watercooling it did not get up to 100 degrees. The ESC is another story as the instant burst of current could not be dissipate fast enough by watercooling that I burnt 2 ESC. I had a miniature diaphragm pump. The TCS micro pump is not good when running, it's only good on bench test. Only my opinion, the trick is getting a pump to flow water but it does work and it's not that heavy.
My motor 1527 1D started out with 140 but with watercooling it did not get up to 100 degrees. The ESC is another story as the instant burst of current could not be dissipate fast enough by watercooling that I burnt 2 ESC.
So you had a motor that wasn't hot in the first place, and made it even less hot, but toasted 2 ESCs in the proccess. Sounds like a win to me!