I'll third the opinion that it will overheat. If you figure on filling 50%, that doesn't leave much cylinder wall to coolant passage surface area to evacuate heat out of the cylinders. An 1/8" coating on the cylinder walls would be nice in theory, but again, you would completely remove any heatsinking abilities from the cylinders to the coolant. I agree with icanfixall- put it back together, and pray for the best the way it is.