When performing a tune-up on an inline six-cylinder engine with mechanically actuated injectors, if you adjusted injector over cylinder number five, which cylinder would you typically adjust at the same location?

When performing a tune-up on an inline six-cylinder engine with mechanically actuated injectors, if you adjusted injector over cylinder number five, which cylinder would you typically adjust at the same location?

• A. #1 cylinder
• B. #4 cylinder
• C. #2 cylinder
• D. #5 cylinder

Answer: (C)

In a mechanical injector system, the injector is driven by a cam on the camshaft, so each injector is timed to a specific cam position. On a six-cylinder inline engine, the cylinders are paired across the engine so that the same cam position serves two cylinders that are opposite each other in the layout: 2 pairs with 5, 1 with 4, and 3 with 6. Therefore, the injector position you adjust for cylinder five aligns with the same cam position that serves cylinder two. So, when you adjust the injector at the location for cylinder five, the corresponding cylinder sharing that cam position is cylinder two.

In a mechanical injector system, the injector is driven by a cam on the camshaft, so each injector is timed to a specific cam position. On a six-cylinder inline engine, the cylinders are paired across the engine so that the same cam position serves two cylinders that are opposite each other in the layout: 2 pairs with 5, 1 with 4, and 3 with 6. Therefore, the injector position you adjust for cylinder five aligns with the same cam position that serves cylinder two.

So, when you adjust the injector at the location for cylinder five, the corresponding cylinder sharing that cam position is cylinder two.