Determining The Operating Cycle of Cylinder 1

Determining the operating cycle of cylinder 1

Information

Compression cycle for cylinder 1 (ignition TDC)

Information
This method only works in ignition rod modules that have rubber seals facing the spark-plug recess.

1. Remove spark plugs for the relevant cylinder 3.





V8 spark plugs

2. Find ignition TDC of cylinder 1. To do this, insert the ignition rod module of the first cylinder into the corresponding opening in the valve cover and press in firmly.





Ignition rod module of cylinder 1

3. Twist the crankshaft in the direction of motion until the ignition rod module comes out again with an audible plop.





Ignition rod module of cylinder 1 pops out

Information
If the crankshaft is then turned through 180 degrees, the piston in cylinder 1 will be located in the bottom dead center (BDC). The emission cycle then follows.

4. Then twist the crankshaft until the fixing bore on the crankshaft belt pulley is aligned with the bore in the timing case cover. The engine is now located in the ignition TDC of cylinder 1.





TDC marking of cylinder 1

Intake cycle (overlapping TDC)

Information
This method only works in ignition rod modules that have rubber seals facing the spark-plug recess.

1. Remove spark plugs for the relevant cylinder 3.





V8 spark plugs

2. Find overlapping TDC of cylinder 1. To do this, insert the ignition rod module of the first cylinder into the corresponding opening in the valve cover and press in firmly.





Ignition rod module of cylinder 1

3. Twist the crankshaft in the direction of rotation until the ignition rod module comes out again with an audible plop.





Ignition rod module of cylinder 1 pops out

4. Then twist the crankshaft until the fixing bore on the crankshaft belt pulley is aligned with the bore in the timing case cover. The engine is now located in the ignition TDC of cylinder 1.





TDC marking of cylinder 1

Information
If the crankshaft is then turned through 180 degrees, the piston in cylinder 1 will be located in the bottom dead center (BDC). The compression cycle then follows.

5. Remove the marking mandrel if necessary and twist the crankshaft through 360 degrees in the direction of motion. The engine is now located in the overlapping TDC of cylinder 1.





TDC marking of cylinder 1