There's no single definitive way to describe cylinder sequence in relation to the block because it depends on your perspective (looking at the engine from the front, from the top, etc.). However, a common way to represent it is:
* 1: Front, passenger side.
* 2: Rear, passenger side.
* 3: Rear, driver side.
* 4: Front, driver side.
* 5: Center, passenger side (slightly rearward).
* 6: Center, driver side (slightly rearward).
This assumes you are viewing the engine from the front of the vehicle. Remember that the precise location can vary slightly depending on the exact model and its mounting in the vehicle. Always double check your specific engine and consult a repair manual for absolute certainty.
