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I have a '90 so I think it would be the same, on mine it is at the front of the engine on the bottom pulley. (crankshaft pulley or vibration dampener) To view the scale and mark I have to look down, a little on the drivers side of center. Beside the break resivour is a good viewpoint, looking just over the timing light. I have to run the timing pickup coil in through the drivers door or window and into the open doghouse cover. Good luck. God Bless!

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Q: Where is the engine timing mark on an '86 Chevy Astro 43L?
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