Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Adjust the Timing on a 1989 Chevy Silverado 5.7L

    • 1). Set the parking brake and open the hood. Locate the pulley on the bottom of the engine next to the timing marks, which is on the driver side of the engine. Clean the marks on the pulley and the timing marks using a shop rag.

    • 2). Start the engine and let it run until it reaches normal operating temperature. Connect the lead from the timing light to the spark plug wire on the front left corner of the engine. Unplug the timing harness just to the left of the distributor using your hands.

    • 3). Point the timing light at the timing marks on the pulley and engine. Determine the current timing by looking at where the mark on the pulley intersects with the timing marks. Loosen the adjusting bolt on the distributor.

    • 4). Turn the distributor while shining the timing light on the timing marks. Watch the mark on the pulley to see the timing advances or retards. When the timing is set to the correct specifications tighten the distributor hold down bolt.

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