Chevrolet Trax: Timing gears
NOTE: Examples used in this article are general in nature and do not necessarily relate to a specific engine or system. Illustrations and procedures have been chosen to guide mechanic through engine overhaul process. Descriptions of processes of cleaning, inspection, assembly and machine shop practice are included.
Always refer to appropriate engine overhaul article, if available, in the ENGINES section for complete overhaul procedures and specifications for the vehicle being repaired.
TIMING GEAR BACKLASH & RUNOUT
NOTE: Examples used in this article are general in nature and do not necessarily relate to a specific engine or system. Illustrations and procedures have been chosen to guide mechanic through engine overhaul process. Descriptions of processes of cleaning, inspection, assembly and machine shop practice are included.
Always refer to appropriate engine overhaul article, if available, in the ENGINES section for complete overhaul procedures and specifications for the vehicle being repaired.
On engines where camshaft gear operates directly on crankshaft gear, gear backlash and runout must be checked. To check backlash, install dial indicator with tip resting on tooth of camshaft gear. Rotate camshaft gear as far as possible. Adjust indicator to zero. Rotate camshaft gear in opposite direction as far as possible and note reading.
To determine timing gear runout, mount dial indicator with tip resting on face edge of camshaft gear. Adjust indicator to zero. Rotate camshaft gear 360 degrees and note reading. If backlash or runout exceeds specification, replace camshaft and/or crankshaft gear.
REAR MAIN OIL SEAL INSTALLATION
NOTE: Examples used in this article are general in nature and do not necessarily relate to a specific engine or system. Illustrations and procedures have been chosen to guide mechanic through engine overhaul process. Descriptions of processes of cleaning, inspection, assembly and machine shop practice are included.
Always refer to appropriate engine overhaul article, if available, in the ENGINES section for complete overhaul procedures and specifications for the vehicle being repaired.
One-Piece Type Seal
For one-piece type oil seal installation, coat block contact surface of seal with sealer if seal is not factory coated. Ensure seal surface is free of burrs. Lubricate seal lip with engine oil and press seal into place using proper oil seal installer. See Fig. 27.
Fig. 27: Installing Typical One-Piece Oil Seal
Rope Type Seal
For rope type rear main oil seal installation, press seal lightly into seat area. Using seal installer, fully seat seal in bearing cap or cylinder block.
Trim seal ends even with cylinder block parting surface. Some applications require sealer to be applied on main bearing cap before installing. See Fig. 28.
Fig. 28: Installing Typical Rope Seal
Split-Rubber Type Seal
Follow manufacturer's procedures when installing split-rubber type rear main oil seals. Installation procedures vary with manufacturer and engine type. See Fig. 29.
Fig. 29: Installing Typical Split-Rubber Seal
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Oil pump
NOTE:
Examples used in this article are general in nature and do not necessarily
relate
to a specific engine or system. Illustrations and procedures have been chosen
to guide mechanic through engine
Break-in procedure
NOTE: Examples used in this article are general in nature
and do not necessarily relate
to a specific engine or system. Illustrations and procedures have been chosen
to guide mechanic through engine
Engine Performance Diagnostic Routine Outline
NOTE: This article is generic in nature and all information
does not apply to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
WHERE DO
SEE MORE:
Communication interface module scan tool information
Telematics Communication Interface Control Module Scan Tool Data
Parameters
Telematics Communication Interface Control Module Scan Tool Output
Controls
SEAT MEMORY CONTROL MODULE SCAN TOOL INFORMATION
Seat Position Scan Tool Data Parameters
Mirror Memory Scan Tool Data Parameters
Lef
Scan tool does not communicate with low speed gmlan device
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
Diagnostic Fault
