This information applies to 2005-06 Buick Rainier, Chevrolet TrailBlazer, GMC Envoy and Saab 9-7x with 4.2L Engine (VIN S - RPO LL8).
On rare occasions, a rough idle or running concern may be encountered with a P0014 and / or P0017 DTC. Due to the rough idle, a P0106 DTC may also be stored. This may be due to debris in the camshaft actuator system, which may be caused by a missing camshaft actuator solenoid screen or a worn crankshaft thrust bearing.
TIP:Â If the condition is due to a worn crankshaft thrust bearing, some customers may also comment on a drive belt noise.
Follow SI diagnostics and repair as necessary. If the SI diagnostics do not isolate the cause of this concern, ensure that the screens are in place (fig. 24).Â
A Screen for advance pressure to camshaft actuator
B Screen for pressurized oil from oil pump
C Screen for retard pressure to camshaft actuator
If any of the screens is missing, replace the camshaft actuator solenoid and change the engine oil and filter.
If all screens are present, measure the crankshaft end play to ensure that it is within the specification of 0.0044 - 0.0153 in. (0.112 - 0.388 mm). Typically, if excessive crankshaft end play is causing this concern, it will be obviously out of specification by .050 in. (1.3 mm) or more and there will be metal in the engine oil. If crankshaft end play is obviously excessive, disassemble the engine and inspect all bearings and journals, the crankshaft, the oil pump, and all valvetrain components for obvious damage from excessive metal in the engine oil.
If the engine block has been damaged due to contact with the crankshaft, contact the PQC at 1.866.654.7654 for engine replacement authorization.
If there is no engine block damage, determine what it will cost to repair the engine, including time to thoroughly clean all of the oil galleys in the cylinder head and engine block. Then, determine what it will cost to replace the engine and contact PQC to review the cost analysis figures as outlined in 02-07-30-029F.
If crankshaft end play is within specification, replace the camshaft actuator solenoid.
- Thanks to Jamie Parkhurst
On rare occasions, a rough idle or running concern may be encountered with a P0014 and / or P0017 DTC. Due to the rough idle, a P0106 DTC may also be stored. This may be due to debris in the camshaft actuator system, which may be caused by a missing camshaft actuator solenoid screen or a worn crankshaft thrust bearing.
TIP:Â If the condition is due to a worn crankshaft thrust bearing, some customers may also comment on a drive belt noise.
Follow SI diagnostics and repair as necessary. If the SI diagnostics do not isolate the cause of this concern, ensure that the screens are in place (fig. 24).Â
A Screen for advance pressure to camshaft actuator
B Screen for pressurized oil from oil pump
C Screen for retard pressure to camshaft actuator
If any of the screens is missing, replace the camshaft actuator solenoid and change the engine oil and filter.
If all screens are present, measure the crankshaft end play to ensure that it is within the specification of 0.0044 - 0.0153 in. (0.112 - 0.388 mm). Typically, if excessive crankshaft end play is causing this concern, it will be obviously out of specification by .050 in. (1.3 mm) or more and there will be metal in the engine oil. If crankshaft end play is obviously excessive, disassemble the engine and inspect all bearings and journals, the crankshaft, the oil pump, and all valvetrain components for obvious damage from excessive metal in the engine oil.
If the engine block has been damaged due to contact with the crankshaft, contact the PQC at 1.866.654.7654 for engine replacement authorization.
If there is no engine block damage, determine what it will cost to repair the engine, including time to thoroughly clean all of the oil galleys in the cylinder head and engine block. Then, determine what it will cost to replace the engine and contact PQC to review the cost analysis figures as outlined in 02-07-30-029F.
If crankshaft end play is within specification, replace the camshaft actuator solenoid.
- Thanks to Jamie Parkhurst
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