Buick Regal: Oil Pump
ROTOR TYPE
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.
Mark oil pump rotor locations before removing. See Fig. 30. Remove outer rotor and measure thickness and diameter. Measure inner rotor thickness. Inspect shaft for scoring or wear. Inspect rotors for pitting or damage. Inspect cover for grooving or wear. Replace worn or damaged components.
Measure outer rotor-to-body clearance. Replace pump assembly if clearance exceeds specification.
Measure clearance between rotors. See Fig. 31. Replace shaft and both rotors if clearance exceeds specification.
Install rotors in pump body. Position straightedge across pump body. Using feeler gauge, measure clearance between rotors and straightedge. Pump cover wear is measured using a straightedge and feeler gauge. Replace pump if clearance exceeds specification.
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Fig. 30: Typical Rotor Type Oil Pump
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Fig. 31: Measuring Rotor Clearance
GEAR TYPE
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.
Mark oil pump gear location before removing. See Fig. 32. Remove gears from pump body. Inspect gears for pitting or damage. Inspect cover for grooving or wear. Measure gear diameter and length.
Measure gear housing cavity depth and diameter. See Fig. 33. Replace worn or damaged components.
Pump cover wear is measured using a straightedge and feeler gauge. Replace pump or components if warpage or wear exceeds specification, or mating surface of pump cover is scratched or grooved.
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Fig. 32: Typical Gear Type Oil Pump
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Fig. 33: Measuring Oil Pump Gear Cavity
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Break-In Procedure
ENGINE PRE-OILING
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 mechan
Maintenance and Lubrication
SPECIFICATIONS
APPROXIMATE FLUID CAPACITIES
FLUID AND LUBRICANT RECOMMENDATIONS
MAINTENANCE ITEMS
MAINTENANCE REPLACEMENT PARTS
Replacement parts identified below by name, part number, or specifica
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Radar Sensor Module - Long Range Learn
NOTE: Adaptive Cruise Temporarily Unavailable service message may be
displayed if this calibration procedure has to be performed. The radar
may have become misaligned.
After replacing and programming the Long Range Radar Sensor Module, it is
necessary to perform a
calibration procedure to align the
Description and Operation
DISC BRAKE SYSTEM DESCRIPTION AND OPERATION
System Component Description
The measurement used to identify the brake system indicates the minimum wheel
size that must be
installed. For example: If a 16 inch brake system is identified, the smallest
wheel that can be installed is a
16 inch wheel.
Th
