G420E/G424E Tier LP Engine Test And Adjustments 83
4. Loosen the distributor hold down nut and rotate
the distributor so that the signal rotor gear tooth of
the #1 cylinder (tooth opposite the flat side of the
distributor shaft) lines up with the sensor pickup.
(Figure G4).
5. To correctly set the distributor, align the center of
the #1 cylinder tooth with the leading edge of the
VR sensor pickup (Figure G5). Keep in mind that
the distributor rotates in a clockwise direction.
6. Once the proper alignment is obtained, lock the
distributor in place by tightening the hold down nut
to the specified torque value and re-install the
rotor, dust cover and rotor cap.
WARNING
Improper alignment of the distributor may
cause system ignition problems resulting
in ignition misfires or backfires.
Figure G5
Flat Side
of Shaft
#1 Tooth
Figure G4
1
Correct Alignment
Incorrect
Alignments
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