Notes
The rotor arm on the top of the distributor should be at 1 0'clock position when piston 1 is on the compression stroke. For piston number 2 it would be at 10 0'clock , for piston 3 it would be at 4 0'clock and for piston 4 at 7 0'clock, so as the engine is turned over the rotor arm also moves. This relates to a 1,3,4,2 firing order. If the piston 1 is at 1 0'clock then the high tension cable to that position should be attached to piston 1.
Proceedure for Ignition Tuning
Turn engine over with spanner to TDC then to 8 degrees such that piston 1 is on the compression stroke.
Remove the distributor lid/cables and unbolt the distributor and remove it.
In the hole, using a screwdriver ensure the groove is set at 12 o'Clock position. Set rotor arm to 11 0'clock position and insert the distributor back lowering it into position, push down and insert bolt loosely in position. Rotor arm should now be in 1 0'Clock position.
Spark test
With the ignition switched on, disconnect the lead from the distributor cap and place near the engine and move the distributor until a spark is seen. Then tighten the bolt that holds the distributor in place to fix it in that position.
Reattach the cables to the distributor/spark plugs and start engine.
With a diesel engine rather than ignition timing we check injection timing