Fast Car

How to Number the Injectors on a BMW 740i

1. Walk around the front of your BMW and open the hood.
2. Locate the fuel injectors on top of the engine. You will see one injector per cylinder--four injectors on the left and four on the right.
3. Grab a piece of paper and pencil and write down the numbers 4, 3, 2, and 1 on a single column to the left of the paper. Make sure there is some space on top and bottom of this column.
4. Write down the numbers 8, 7, 6, and 5 on a single column to the right of the first column of numbers.
5. Write down the word rear on top of the two columns of numbers, and the word front at the bottom of the two columns of numbers.
6. Grab your piece of paper with the two columns of numbers and stand in front of the engine, facing the drive belt. If you look at your notes on the piece of paper, the two columns of numbers represent the cylinder numbers in your BMW 740i. The word rear represents the back of the engine and the front represents the front of the engine, which you are facing right now.
7. Label each of the fuel injectors using a piece of masking tape and a black marker, according to the numbers you have assigned to the each cylinder.