The following procedure can be
considered a general procedure for most vehicles.
Refer to the service manual for the procedure for
you vehicle.
Crankshaft Sensor
Adjustment on a General Motors Single Slot
Sensor
If a single slot
crankshaft sensor requires adjustment,
follow this procedure:
CAUTION
Always be sure the ignition
switch is off before attempting to
rotate the crankshaft with a socket
and breaker bar. If the ignition
switch it on, the engine may start
suddenly and rotate the socket and
breaker bar with tremendous force.
This action may result in personal
injury and vehicle damage.
Be sure that the
ignition switch is off.
Then rotate the
crankshaft with a pull handle and socket
installed on the crankshaft pulley nut.
Continue rotating
the crankshaft until one of the
interrupter blades is in the sensor and
the edge of the interrupter window is at
the edge of the defector on the
pedestal.
Insert a crankshaft
adjustment tool between each side of the
blade and the sensor.
If the tool does
not fit between each side of the blade
and the sensor, adjustment is required.
The gap measurement
should be repeated at all three blades.
If the sensor
adjustment is necessary, loosen the
pinch bolt and insert the adjusting tool
between each side of the blade and the
sensor.
Move the sensor as
required to insert the gauge. Tighten
the sensor pinch bolt to 30 in.lb. (3 to
7 Newton meters (N?M).
Rotate the
crankshaft and recheck the gap at each
blade.
