PleasureCraft Engine Group 5.0L, Diagnostic Manual

Page: 136 / 337

4B - 14 Electronic Ignition 6.0/8.1L
MEFI 4 - PCM
Crankshaft Position (CKP) Sensor
Replacement - 8.1L
Removal Procedure
1. Disconnect the crankshaft position (CKP) sensor
harness connector at the CKP sensor.
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Important: Use penetrating oil, and allow the oil to soak
around the CKP sensor prior to removing the sensor.
2. Remove the CKP sensor retaining bolt.
3. Twist the sensor prior to removal.
4. Remove the CKP sensor.
Installation Procedure
Important: Ensure that the crankshaft position sensor
is fully seated against the crankshaft reluctor ring. The
upper fl ange on the sensor MAY NOT seat against the
engine block. The sensor is designed to wear to zero
tolerance against the reluctor ring. The sensor is designed
to be removed and installed three times. Exceeding three
installations with the same sensor may result in engine
driveability problems or a possible no-start.
Important: The crankshaft position sensor bolt has a
thread sealant applied to the threads. The thread sealant
may have come off during the removal of the bolt. Ensure
that the bolt hole is clean of any debris before installing
the crankshaft sensor bolt.
1. Inspect both crankshaft position sensor O-rings for
cuts, cracks, tears or damage. Replace the O-rings
as needed. Lubricate the crankshaft position sensor
O-rings with clean engine oil.
2. Install the crankshaft position sensor into the engine
block.
There may be a slight resistance as the O-rings
seat into the engine block.
3. Apply thread sealer to the crankshaft position
sensor bolt.
4. Install the crankshaft position sensor bolt.
Tighten
Tighten the crankshaft position sensor bolt to 25
N.m (18 lb ft).
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