starting the engine is not possible when your timing belt breaks down. I remember my uncle had his pajero serviced changed the timing belt since he already reached 80K km, instead of using an original timing belt bumili cya ng replacement lng and while he was driving at 80kph there was a "toktok" sound and the engine shutdown. when the mechanic opened the engine naputol daw yung timing belt and tumukod yung mga pistons kaya full overhaul ang ginwa.