I am replacing the wiper motor for the second time on my 82 cj7. It seems that the nipple that holds the wiper on the left hand side has become flexible and the wiper gets in a bind. Has anyone else had this trouble and is it possible to brace it somehow from behind or easier to replace the windshieled frame? Also what year blazer heater motor fits a cj7? In the rain and heatless in east tennessee.........