Crankshaft endplay must always be checked. With the 170 and 200ci six, endplay is 0.004-0.008-inch with a maximum allowable amount of wear at 0.012-inch. Endplay affects everything along the crankshaft. When endplay is excessive, you are courting trouble due to poor alignment issues. By the same token, it must not be too small, creating risk of cease up.