Tip & How-To about 1988 BMW M5
Pay attention to what spark plug comes from what cylinder, and save the old spark plugs. The cylinders are numbered from 1 to 8 as follows: Front of car Left side - right side Cylinder Bank 2 - Cyliner Bank 1 5 - 1, 6 - 2, 7 - 3, 8 - 4, Rear of car. The reason for keeping track of the old spark-plugs is it can later provide important information to a person who knows how to "read" spark-plugs, if the engine ever develops a problem. Also it is good practice to put the coils back in the same places those were.
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