Each cylinder head contains three spark plugs.
Front Cylinder Head
• No. 1 cylinder: At the rear of the cylinder head, closest to the firewall
• No. 3 cylinder: In front of the No. 1 spark plug
• No. 5 cylinder: At the front of the cylinder head
Rear Cylinder Head
• No. 2 cylinder: In front of the No. 4 spark plug
• No. 4 cylinder: At the front of the cylinder head, closest to the firewall
• No. 6 cylinder: In the rear of the cylinder head