A few months ago I acquired a clean 2 door 1990 montero that sat for 5 years with the block and heads rebuilt but not together. Anyway yesterday I was out putting miles on it and all of the sudden it started loosing power... I heard some squealing and it died. It will start with oil pressure but it sounds bad....rattles and some squeaking.. There was no warning. Run really quiet. I read that the oil slinger plate should go to outside of timing belt cover and I may have put it behind cover........ Will that cause what I described? What steps should I take to pinpoint my problem.