OK. The good news is that the fan is installed correctly; bad news is that when we removed the drain plug as you suggested, hardly any water came out so we have to assume that the water jacket is silted up. Now I am reluctant to take out the engine so we are going to take off the head and see how far we get in cleaning out the water jacket and the head. Do you have any comments on this course of action?
Thanks again for your input
Paul
Paul Domoney