To understand the location, you need to visualize the engine's layout. The engine is oriented with the crankshaft at the front of the vehicle. Cylinder numbering is usually sequential, and often in a pattern that alternates between banks (sides) of the V. However, the exact numbering scheme can vary slightly between manufacturers and even engine variants.
To find cylinder #6 (assuming standard numbering for a 4.6L V8), you'll likely find it on the passenger side (right side in a US vehicle) of the engine, somewhat towards the rear. But to be sure, consult a repair manual or diagram specific to the 2001 Ford Navigator 4.6L V8 engine. These diagrams will clearly show the cylinder location and firing order.
