I began to repair the water pump in my 90 and ran in to a snag. I read both my manuals but could not find the answer. I installed the impeller and found that it is much bigger than the insert cartridge. Am I suppose to squeeze the fins of the impeller to get it to fit? If so do the fins bend around clockwise or counter clockwise? While Im at it, which way does the drive shaft turn when in gear? I was told to never turn the driveshaft in the wrong direction or the impeller will be damaged; is that correct?