Which of the following identifies the correct companion cylinder pairings in an in-line 6-cylinder engine?
A) 1 - 2, 3 - 4, 5 - 6
B) 1 - 5, 3 - 6, 2 - 4
C) 1 - 6, 2 - 5, 3 - 4
D) 6 - 5, 4 - 3, 2 - 1

Question

Quizplus · Accepted Answer

In an in-line 6-cylinder engine, the companion cylinders are those that are 360 degrees out of phase with each other in the firing order. The correct pairing, considering a common firing order of 1-5-3-6-2-4, is 1-6, 2-5, and 3-4, where each pair's pistons move up and down together but fire 360 degrees apart.

Which of the Following Identifies the Correct Companion Cylinder Pairings