Replacement, Engine Overhaul
REMOVALNOTE: In order to prevent damage, take care when removing the crankshaft position sensor. Prying up the mounting bracket may break the bracket loose from the sensor. If the mounting bracket separates from the sensor, replace the crankshaft position sensor.
1. Remove the bolt in the crankshaft position sensor mounting bracket.
2. Twist and pull the crankshaft position sensor straight out from the front cover.
3. Remove the oil pan to front cover bolts.
4. Remove the front cover to block bolts.
5. Remove the front cover.
CAUTION: Perform TDC Offset Recovery procedure in Powertrain Management if the timing chain, timing gears, engine front cover, crankshaft position sensor, crankshaft or other components affecting the timing are replaced.
6. Remove the front crankshaft seal using a large screwdriver. Do not reuse the seal.
INSTALLATION
- Tools Required
- J 22102 Seal Installer, Or Equivalent
NOTE: Replacing either of the following will affect timing:
- The timing chain
- The timing gears
- The front cover
- The Crankshaft Position (CKP) sensor
- The crankshaft
- It will then be necessary to reprogram TDC Offset (Recovery) into the PCM.
1. Clean the front cover and the block sealing surfaces, in order to ensure that they are free from oil.
CAUTION: Perform TDC Offset Recovery procedure in Powertrain Management if the timing chain, timing gears, engine front cover, crankshaft position sensor, crankshaft or other components affecting the timing are replaced.
2. Install the front crankshaft oil seal using the seal installer with the open end of the seal facing the inside cover.
3. Coat the seal lips with grease.
4. Apply a 2 mm (3/32 inch) bead of anaerobic sealant GM P/N 1052357, or the equivalent, to the front cover sealing area.
5. Install the front cover to the engine.
6. Install the front cover bolts.
- Tighten the front cover bolts to 45 Nm (33 lb ft).
7. Install the crankshaft position sensor with a new o-ring seal.
- Tighten the retaining bolt to 25 Nm (17 lb ft).