TDC Problems 4.3 L

Old 06-23-07, 03:07 PM
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Unhappy TDC Problems 4.3 L

What is the easiest way to find Top dead center on my rebuilt 4.3 L chevy? The motor is on the engine stand and is completely together.The rotor must point at #1 spark plug wire at TDC, right?
Old 06-23-07, 04:17 PM
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Yes do use the #1 cylinder as your reference. Some people cut a plastic tube with a fitting on it that will screw into the #1 plug hole, and fill it with oil. They then turn the crank and observe the oil rise in the tube. Where ever the highest point in the oil tube landed, thats your TDC.

There are other ways to determine it, that's just one.
Old 06-23-07, 04:29 PM
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a knitting needle or other similar object.

stick it into the sparkplug hole and as you crank the engine, you can observe where the piston is.

Remember that the piston will rise and fall twice for each complete cycle of the engine. There will be TDC where the spark plug would fire and there is TDC at the end of the exhaust stroke.

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