I never understood heating the engine up to get the case out! The reason is because the case is aluminum and the sleeve is brass! The brass expands when it gets hot, where the case does as well but nowhere as much as the sleeve, so to me that would be the opposite thing you would do. I always freeze my engine overnight and the sleeve slides right out. The sleeve will shrink where the case will not. Making it extremely easy to pull it out. Heating may work but for me freezing works better. Just my 2cents!