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2026. 6. 30. 작업

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How to check that crankshaft and cam pulleys are in sync?

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Simple engine dynamics of a 4-stroke engine dictates as long as the timing marks are aligned for the engine, it will take two complete rotations of the crankshaft for things to be aligned again. As long as the marks are aligned in one of the two rotations, there is no issue. The crank position indicator shows when the #1 piston is at top dead center (TDC). It doesn't care if it's at TDC between the compression/power strokes or between the exhaust/intake strokes. For reference, here's an image of how the timing marks should align on the J35 : NOTE: You probably won't have the marks with white on them. This is just to show you what to look for. To double check to ensure there's no issues, turn the crank a full 720° and recheck your timing marks. Stop the rotation if there is any resistance if you have the spark plugs out. If you still have the spark plugs in, just turn the crank by hand and allow the pressure to bleed off during the compression stroke on each cylinder. If there's major r