Buick Regal 2018-2025 Service Manual / Engine / Firing Order and Cylinder Identification
Buick Regal: Firing Order and Cylinder Identification
NOTE: This information is intended as a quick reference for firing order and cylinder identification only. The information provided covers many vehicles and may include some information that does not apply to the vehicle you have currently selected.
3 CYLINDER ENGINE
4 CYLINDER ENGINE
5 CYLINDER ENGINE
IN-LINE 6 ENGINE
V6 ENGINE
3.5L VIN 4 V6 Engine
3.8L & 4.3L V6 Engines
All Other V6 Engines Except 3.5L (VIN 4), 3.8L & 4.3L
8 CYLINDER ENGINE
4.0L, 4.4L & 4.6L V8 Engines
5.0L, 5.7L (VIN R & VIN K) & 7.4L V8 Engines
6.6L Diesel V8 Engine
All Other V8 Engines Except 4.0L, 4.4L, 4.6L, 5.0L, 5.7L (VIN R & K), 7.4L & 6.6L
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Specifications, Schematic Wiring Diagrams
Specifications
FASTENER SPECIFICATIONS (OFF VEHICLE)
Single Use Non-Threaded Fasteners/Components
NOTE:
All fasteners/components listed in this table MUST BE DISCARDED and replaced
with NEW
after rem
SEE MORE:
Specifications, Schematic and Wiring Diagrams
SPECIFICATIONS
FASTENER SPECIFICATIONS
Single Use Non-Threaded Fasteners/Components
NOTE:
All fasteners/components listed in this table MUST BE DISCARDED and replaced
with NEW after removal.
Application
Power Steering Assist Motor SealSteering Gear BeltSteering Gear Boot Inner ClampSteering Gear Bus
Camshaft Position Actuator and Camshaft Replacement - Exhaust
Special Tools
EN-50656 Holding Tool
EN 50793 Locking Tool
For equivalent regional tools, refer to Special Tools.
Removal Procedure
NOTE: Ensure the engine is properly timed to Top Dead Center (TDC),
prior to
performing repairs.
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement.
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