Common questions

Where is the TDC mark on a distributor?

Where is the TDC mark on a distributor?

The rotor SHOULD be pointing to the little notch in the distributor body, which is the marking for #1 cylinder firing position. If it isn’t, you are either NOT at TDC for #1, or your distributor drive pinion is indexed wrong, and needs to be removed and rotated to the proper position.

Where is the 1 cylinder located at TDC?

It will appear in an opening in the bottom of the clutch housing near the starter. When the groove is centered in the opening the #1 cylinder is at TDC. Personally, I don’t care for this method because if the groove is not centered in the opening, the timing can be off ±1 tooth.

When to set engine to top dead center ( TDC )?

Procedure NOTE When setting the engine to TDC on the compression stroke for cylinder #1, you must realize that the crankshaft rotates twice for every single rotation of the camshaft. So, if you simply set the crankshaft to TDC without looking at the position of the camshaft, you may actually be at TDC on the exhaust stroke for cylinder #1.

Where does the crankshaft go when setting to TDC?

So, if you simply set the crankshaft to TDC without looking at the position of the camshaft, you may actually be at TDC on the exhaust stroke for cylinder #1.

It will appear in an opening in the bottom of the clutch housing near the starter. When the groove is centered in the opening the #1 cylinder is at TDC. Personally, I don’t care for this method because if the groove is not centered in the opening, the timing can be off ±1 tooth.

Where can I find the TDC mark on my car?

If you have trouble locating the TDC mark from above, there is a 5 mm wide groove in the flywheel which can be used to locate TDC as well. It will appear in an opening in the bottom of the clutch housing near the starter. When the groove is centered in the opening the #1 cylinder is at TDC.

What causes the engine to go to TDC?

As the engine is rotated, the piston will force the dowel upward. When the end of the dowel is at its highest point, the engine is at TDC for the #1 cylinder.

So, if you simply set the crankshaft to TDC without looking at the position of the camshaft, you may actually be at TDC on the exhaust stroke for cylinder #1.

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Ruth Doyle