Earlier today, I attempted to do a brake fluid flush on my `08 Saturn Aura (mechanically, think Chevrolet Malabu). I was using a manual pumped pressure flush tank with the GM fitting for the "tank" mounted on the master cylinder. I pumped the brake flush tank up to a max of ~12 PSI (no more than 20 PSI max is recommended) and bled the back two calipers and then noticed a good bit of leakage under the car below the master cylinder area. My question is why was it leaking where the tank is fitted/mounted to the top of the master cylinder? It was not leaking at the fitting to the top of the tank. Is a hold down strap or something similar required to prevent leaks where the tank and the master cylinder attach to each other? I must be missing a procedure somewhere!?