You can get a tank valve from O'reillys for less than $3. screw it into the coolant sensor 1/8 npt port & air it up to 5 to 10 psi. with the system full of coolant it just takes a split second of holding the air chuck on the valve to reach psi. I still think the blowby is problematic & people say rings will seat over time but the people at the motorcycle ring breakin site at www.mototuneusa.com say the ring breakin will take place or not take place immediately with a good breakin procedure & not over time. I dont know everything on that subject. Keep us updated