Transport Spark Plug - Removal Tips
90bmw17 Group 11 EngineBulletin Number 11 13 90 (3159)
Woodcliff Lake, NJ November 1990 Service Engineering
Tool Tips
SUBJECT: Transport Spark Plug Removal
Model: M5 (E34)
Situation: A limited number of transport spark plugs for M5's were produced with
a dimension of 18 mm (across the flats) instead of 17.5 mm.
Solution: A MAC tool (18 mm spark plug socket # SC112) removes the above plugs without any problem. Its outside diameter has the proper clearance for the top of the spark plug hole.
Suggested by: David McDaniel of Grayson BMW, Knoxville, TN