Crankshaft Position Sensor Replacement - Removal Procedure
1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Remove the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
4. Disconnect the crankshaft position (CKP) sensor electrical connector.
5. Remove the CKP sensor bolt (1).
6. Remove the CKP sensor (2) from the engine block:
• Remove the sensor by pulling on the sensor connector. DO NOT pry on the bracket.
• DO NOT rotate or twist the sensor or damage the mounting bracket if the sensor is being reused.
Installation Procedure
Important: When replacing the CKP sensor with a new sensor or reinstalling the original sensor, use the following recommended procedures:
• Ensure that the CKP sensor bore is completely free of any foreign material, such as old O-ring, dirt, burrs, etc.
• Ensure that the flange on the CKP sensor bore is not damaged.
• Clean all the mounting surfaces before re-installing any components.
• Inspect the CKP sensor and replace the sensor if any of the following conditions are present:
- The bracket is damaged.
- The bottom of the brass housing exhibits any damage.
- Never install a sensor that has been dropped.
• Lubricate the O-ring on the sensor with clean engine oil prior to installing the sensor .
• Inspect all the connectors for any damaged terminals.
1. Install and fully seat the CKP sensor (2) into the engine block.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
2. Install the CKP sensor bolt (1).
Tighten
Tighten the bolt to 9 N·m (80 lb in)
3. Ensure that the CKP sensor mounting flange is contacting the engine block.
4. Connect the CKP sensor electrical connector.
5. Install the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
6. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
7. Lower the vehicle.
8. The CKP System Variation Learn Procedure must be performed after replacing the CKP sensor. Even if the original sensor is reinstalled, the Learn Procedure must be performed.
9. Engine Coolant Temperature Sensor Replacement
Removal Procedure
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. Partially drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
2. Remove the exhaust gas recirculation (EGR) inlet pipe. Refer to Exhaust Gas Recirculation (EGR) Inlet Pipe Replacement .
3. Disconnect the ECT sensor (1) .
4. Remove the ECT sensor.
Installation Procedure
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.
1. Coat the sensor threads with sealer GM P/N 12346004, (Canadian P/N 10953480) or equivalent.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
2. Install the ECT sensor (1).
Tighten
Tighten the sensor to 20 N·m (15 lb ft).
3. Connect the ECT sensor electrical connector.
4. Install the EGR inlet pipe. Refer to Exhaust Gas Recirculation (EGR) Inlet Pipe Replacement .
5. Fill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
6. Engine Coolant Thermostat Replacement
Tools Required
J 38185 Hose Clamp Pliers
Removal Procedure
1. Partially drain the cooling system. Refer to Cooling
System Draining and Filling .
2. Use the J 38185 to remove the radiator hose clamp from the water inlet housing.
3. Remove the radiator hose from the water inlet housing.
4. Use the J 38185 to remove the heater hose clamp from the water inlet housing.
5. Remove the heater hose from the water inlet housing.
6. Use the J 38185 to remove the surge tank inlet hose clamp from the water inlet housing.
7. Remove the surge tank inlet hose from the water inlet housing.
8. Remove the water inlet housing bolts.
Important: The water inlet housing (2) and the thermostat are replaced as an assembly.
9. Remove the water inlet housing and the thermostat.
10. Inspect and clean the water inlet mating surfaces.
Installation Procedure
1. Install the thermostat and the water inlet housing (2).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
2. Install the water inlet housing bolts.
Tighten
Tighten the bolts to 9 N·m (80 lb in).
3. Install the surge tank inlet hose to the water inlet housing.
4. Use theJ 38185 to install the surge tank hose clamp to the water inlet housing.
5. Install the heater hose to the water inlet housing.
6. Use theJ 38185 to install the heater hose clamp to the water inlet housing.
7. Install the radiator hose to the water inlet housing.
8. Use theJ 38185 to install the radiator hose clamp to the water inlet housing.
9. Fill the cooling system. Refer to Cooling System Draining and Filling
Time Estimated: 4.5 hours.
Hope helps.
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Engine control module (ECM) replacement
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Crankshaft damper replacement
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Crankshaft replacement
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CKP sensor replacement
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Any engine repairs which disturb the crankshaft to CKP sensor relationship
Important: The scan tool monitors certain component signals to determine if all the conditions are met to continue with the CKP system variation learn procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components:
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CKP sensor activity--If there is a CKP sensor condition, refer to the applicable DTC that set.
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Camshaft position (CMP) signal activity--If there is a CMP signal condition, refer to the applicable DTC that set.
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Engine coolant temperature (ECT)--If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.
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