However, the exact location and appearance of these marks can vary slightly depending on the specific engine code (e.g., 2.2L, 2.5L). To find them accurately:
1. Consult a repair manual: A factory service manual for your specific 1991 Dodge Shadow year and engine is the best resource. This manual will show you exactly where the marks are located with clear diagrams and instructions. You can find these online or at auto parts stores.
2. Look carefully at the harmonic balancer: The mark is usually a single line or notch, sometimes painted. It might be somewhat recessed or difficult to see, so clean the area first.
3. Locate the corresponding mark on the timing cover: The mark on the timing cover might be a pointer or a notch that aligns with the balancer mark when the engine is at top dead center (TDC) on the number one cylinder.
4. Consider the engine's position: You will need to rotate the engine (usually by hand using a wrench on the crankshaft bolt) to align the marks. Make sure the engine is at TDC on the compression stroke for cylinder #1. This often requires using a compression tester or checking the rotor position on the distributor if one is present.
Without a repair manual, attempting to locate these marks solely based on general advice is highly risky. Incorrect timing can severely damage your engine. It's always best to consult a manual or a qualified mechanic.
