We have a 2001 Winnebago Adventurer with a 310 hp Ford engine. We've pulled a lot of hills in 97,000 plus miles. We pulled Wolf Creek Pass a few years ago - talk about a slow climb - 20 mph for about 1/2 hour. Anyway, when we got to the top we stopped to let the engine rest. Recently found out that the engine should continue to run after a long pull; helps to cool it down. Any thoughts on that?