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Old 11-21-2020, 12:23 PM   #4
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You should always set the #1 piston to TDC on the compression stroke by physically verifying that the piston is at TDC with a wooden dowel, screwdriver, or similar. You can tell the difference between the compression stroke and exhaust stroke by the presence of pressure building in the cylinder with your thumb over the spark plug hole. If you’re on the exhaust stroke pressure can’t build because the exhaust valves are open.

The other marks surrounding the belt are just for reference. If the piston is at TDC on compression stroke, THAT is correct. The crank DOES NOT get moved to align anything once set to TDC. Align the belt mark for the crank first. The other marks on the cams can then be moved to line up with the marks on the belt if they’re off. Those marks on the timing cover just let you know if you’re in the ballpark.
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