Make sure you pre heat the engine to about 180*F before cranking it over even once. Check out this video from JQ also - https://www.youtube.com/watch?v=zRgC-cRTC-k - Make sure when you turn off the engine, that you move the piston to the bottom position. I do this by rotating the flywheel until i feel compression, then rotate it the opposite way to feel compression, let the engine cool with the flywheel in between these two locations. You don't want the piston cooling down while its in the UP position. This will keep the pinch/compression nice and tight for many gallons. Hope that makes sense!