The 1992 Pontiac Grand Am with the 2.3L OHV (not OHC) engine doesn't have timing marks in the traditional sense like a distributor-equipped engine. Instead, the timing is controlled by a
crankshaft position sensor and the
camshaft position sensor. These sensors tell the engine's computer (PCM) the crankshaft and camshaft positions, allowing for precise ignition and fuel injection timing.
Therefore, there are no timing marks to align on the engine itself for setting the timing. Any timing adjustment is done through the PCM's programming (unlikely for a DIY mechanic), or by replacing faulty sensors. If you're experiencing timing-related issues, you need to use a scan tool to diagnose sensor problems or computer issues, not look for physical timing marks.
