If you adjust the injector for cylinder 5 on an inline six-cylinder engine with mechanically actuated injectors, which cylinder would share the same valve-timing location for this adjustment?

If you adjust the injector for cylinder 5 on an inline six-cylinder engine with mechanically actuated injectors, which cylinder would share the same valve-timing location for this adjustment?

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

Answer: (B)

The injector timing is tied to a fixed position on the camshaft. In an inline six, the six cylinders are evenly spaced around the crank, and the valve events repeat with each camshaft cycle. Cylinders that are three positions apart (three cylinders away) reach their valve timing at the same cam position because the crank angle difference is 360 degrees, which corresponds to the same point on the cam due to its half-speed rotation. For cylinder five, the cylinder that sits three places away is cylinder two, so they share the same valve-timing location. The other cylinders do not line up with that same cam position.

The injector timing is tied to a fixed position on the camshaft. In an inline six, the six cylinders are evenly spaced around the crank, and the valve events repeat with each camshaft cycle. Cylinders that are three positions apart (three cylinders away) reach their valve timing at the same cam position because the crank angle difference is 360 degrees, which corresponds to the same point on the cam due to its half-speed rotation. For cylinder five, the cylinder that sits three places away is cylinder two, so they share the same valve-timing location. The other cylinders do not line up with that same cam position.