To meet the engine requirement, a horizontally opposed 12-cylinder design was used. Although flat, it was wide and left no room for radiators in the engine compartment, and so the radiators were situated at the front of the vehicle. The unusual arrangement, although tested in mockup form first, when combined with the rushed design process resulted in serious problems with engine cooling. Even when the systems were redesigned, there were problems, and the piping from engine to the radiators heated the fighting compartment. These problems meant that the Covenanter would not be employed in the North African Campaign. Instead, Crusader and American tanks were sent to Africa, while the Covenanters remained in the British Isles.