Two problems related to engine have been reported for the 1997 Mazda Protege. The most recently reported issues are listed below.
Engine idled roughly. Vehicle was under warranty. Dealer tightened engine valves. 2 months later, warranty expired. Dealer dismantled engine and had to remachine the valves.
Engine mounts. Rattle noice inside the hood when car sits at an idle & reverse. Also with a/c on & it vibrates.