Distributor Cap and Rotor - New Design

Group 12
Engine - Electric



Bulletin Number
12 02 90 (3115)



Woodcliff Lake, NJ
November 1990
Service Engineering



SUBJECT:
Modified Distributor Cap and Rotor

MODEL:
M3 (E30)

Situation:





A new style distributor cap and rotor has been phased into production since 12/88 on S14 engines. The new style distributor cap incorporates a rigid brass pin instead of a spring loaded carbon brush which rides in a contact hole of the new style rotor (see illustration).



A mixed installation of components belonging to different engineering developments, i.e., later style distributor cap and early style rotor without contact hole, is not acceptable. The distributor cap may be destroyed upon assembly due to an unfavorable buildup of tolerances between the camshaft and rotor.

Parts
Information:
(Early Style) (Later Style)
Description Part Number Part Number

Distributor cap 12 11 1 309 797 12 111 312 160
Rotor 12 11 1 309 798 12 111 312 157

Do not mix early and later style components.

This information will be incorporated into the next update of the Parts Microfiche.