I just got my motor back together, and after I drove it awhile, i started to lose a lot of power. I thought that maybe it was just breaking in, then I noticed a metal on metal noise coming from the motor. COme to find out, that the oil pump gave out, and oil wasn't getting to the head so the chain wasn't getting lubed. My question is, is there an easier way to put in a new oil pump other than ripping down the side of the motor? Its going to be a pain in the ass if that is my only option.