its not acually a mazda engine but the head is the same type i believe. i have a 97 & i noticed that there are parts in the manual specs & under the hood that say "mazda". the protege is very similar, so im assuming you would be able to use certain parts for/from these cars for yours. i would consult a certified kia mechanic about this. (call the dealership & ask to speak to a technician?)
1.8 DOHC BP: Years-1990-2001 Bore-83 Stroke-85 CC-1839 Models-90-98 Protege, 91-96 Ford Escort GT, 94-01 Miata, Mercury Tracer LTS, 94-97 Kia Sephia GS
i use google to search for parts for my car, just put in the name of the part & the car you want & it will bring you to sites containing them

hope that helps