The timing belt broke on my 99 S80 at 110,000 miles. I'm having another engine installed that has 93,000 miles. Needless to say I'm having a new belt , water pump, tensioner put in the new engine. Before the belt broke I was loosing 1-2 quarts of oil each week. No leaks anywhere. Car was running great. Could the PCV have been clogged? What should I do to the new engine to fix this?