How to Adjust Ignition Timing?
2 Answers
Locate the top and bottom dead center marks on the circumference of the crankshaft pulley; rotate the crankshaft until the piston is just at the compression top dead center position, then install the dial indicator bracket and the indicator head. Ensure the dial indicator's contact tip is perpendicularly touching the exhaust valve spring seat and maintains a certain pressure; rotate the dial to align the large pointer of the dial indicator with "0". Install an angle disk on the flywheel, slowly rotate the flywheel, and observe the change in the dial indicator pointer. When it moves away from the "0" value, this indicates the exhaust valve opening time.
Adjusting the ignition timing was a bit overwhelming when I first started learning car repairs. The key is to align the engine's ignition moment to prevent knocking. The first step is to locate the top dead center (TDC) position of the first cylinder, usually marked by scale lines on the flywheel or indicated by a label under the hood specifying the standard angle, such as 10 to 15 degrees advance. Then, use a timing light tool clipped onto the first cylinder's spark plug wire. Start the engine, and when the light flashes, shine it on the flywheel scale to check if the pointer or light spot is within the specified range. If it's off, loosen the distributor's fixing nut, slowly rotate the distributor body to adjust the angle slightly, and stop to check each small adjustment before tightening the nut to secure it. Take your time during the process, and listen for smooth engine operation—stop immediately if you hear knocking or unusual noises. After testing, ensure idle stability and normal acceleration for better fuel efficiency and smoother driving. Beginners should consider getting help or following online tutorials step by step to avoid engine damage from misoperation.
