Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 309 (ENGINE MECHANICAL)
2008 Pontiac Grand Prix Base
Section 309 (Engine Mechanical)
2008 Pontiac Grand Prix BaseSECTION Section 309 (Engine Mechanical)
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic Wiring Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Engine Mechanical
- Symptoms - Engine Mechanical
- Base Engine Misfire Without Internal Engine Noises
- Base Engine Misfire With Abnormal Internal Lower Engine Noises
- Base Engine Misfire With Abnormal Valve Train Noise
- Base Engine Misfire With Coolant Consumption
- Base Engine Misfire With Excessive Oil Consumption
- Engine Noise On Start-Up, but Only Lasting a Few Seconds
- Upper Engine Noise, Regardless Of Engine Speed
- Lower Engine Noise, Regardless Of Engine Speed
- Engine Noise Under Load
- Engine Will Not Crank - Crankshaft Will Not Rotate
- Coolant In Combustion Chamber
- Coolant In Engine Oil
- Engine Compression Test
- Cylinder Leakage Test
- Oil Consumption Diagnosis
- Oil Pressure Diagnosis And Testing
- Cylinder Deactivation (Active Fuel Management) Oil Pressure Relief Valve Diagnosis And Testing
- Camshaft Position Actuator And Solenoid Valve Diagnosis And Testing
- Oil Leak Diagnosis
- Crankcase Ventilation System Inspection/Diagnosis
- Drive Belt Chirping, Squeal, And Whine Diagnosis
- Drive Belt Rumbling And Vibration Diagnosis
- Drive Belt Falls Off And Excessive Wear Diagnosis
- Drive Belt Tensioner Diagnosis
- Repair Instructions - On Vehicle
- Drive Belt Replacement - Accessory
- Air Conditioning Compressor Belt Replacement
- Drive Belt Idler Pulley Replacement
- Drive Belt Tensioner Replacement - Accessory
- Drive Belt Tensioner Replacement - Air Conditioning
- Engine Mount Inspection
- Engine Mount Replacement - Left Side
- Engine Mount Bracket Replacement - Left Side
- Engine Mount Replacement - Right Side
- Engine Mount Bracket Replacement - Right Side
- Upper Intake Manifold Sight Shield Replacement (6.0L (LQ4))
- Positive Crankcase Ventilation Hose/Pipe/Tube Replacement
- Intake Manifold Replacement
- Engine Block Valley Cover Replacement
- Valve Rocker Arm Cover Replacement - Left Side
- Valve Rocker Arm Cover Replacement - Right Side
- Valve Rocker Arm And Push Rod Replacement
- Valve Stem Oil Seal And Valve Spring Replacement
- Engine Oil Level Indicator And Engine Oil Level Indicator Tube Replacement
- Cylinder Head Replacement - Left Side
- Cylinder Head Replacement - Right Side
- Valve Lifter Replacement
- Crankshaft Balancer Replacement
- Crankshaft Front Oil Seal Replacement
- Camshaft Position Actuator Magnet Replacement
- Engine Front Cover Replacement
- Camshaft Position Actuator Solenoid Valve Replacement
- Camshaft Position Actuator Replacement
- Crankshaft Rear Oil Seal Replacement
- Engine Rear Cover Replacement
- Engine Oil Filter Adapter Replacement
- Engine Oil Filter Bypass Valve Replacement
- Engine Oil Pan Replacement
- Engine Oil Pressure Sensor And/Or Switch Replacement
- Engine Oil Level Sensor And/Or Switch Replacement
- Engine Oil Pump, Engine Oil Pump Screen, And Crankshaft Oil Deflector Replacement
- Timing Chain And Sprocket Replacement
- Camshaft Replacement
- Automatic Transmission Flex Plate Replacement
- Engine Replacement
- Engine Oil and Engine Oil Filter Replacement
- Repair Instructions - Off Vehicle
- Draining Fluids And Oil Filter Removal
- Crankshaft Balancer Removal
- Automatic Transmission Flex Plate Removal
- Engine Oil Level Indicator And Tube Removal
- Exhaust Manifold Removal - Left Side
- Exhaust Manifold Removal - Right Side
- Water Pump Removal
- Throttle Body Removal
- Fuel Rail And Injectors Removal
- Intake Manifold Removal
- Engine Coolant Air Bleed Pipe and Hole Cover Removal
- Engine Block Valley Cover Removal
- Valve Rocker Arm Cover Removal - Left Side
- Valve Rocker Arm Cover Removal - Right Side
- Valve Rocker Arm And Push Rod Removal
- Cylinder Head Removal - Left Side
- Cylinder Head Removal - Right Side
- Valve Lifter Removal
- Engine Oil Filter Removal
- Engine Oil Pan Removal
- Engine Front Cover Removal
- Crankshaft Rear Oil Seal Housing Removal
- Engine Oil Pump, Engine Oil Pump Screen and Crankshaft Oil Deflector Removal
- Camshaft Position Actuator And Solenoid Valve Removal
- Camshaft Removal
- Piston, Connecting Rod, And Bearing Removal
- Crankshaft And Bearing Removal
- Engine Block Plug Removal
- Engine Block Cleaning And Inspection
- Cylinder Boring And Honing
- Crankshaft and Bearing Cleaning And Inspection
- Crankshaft Balancer Cleaning And Inspection
- Automatic Transmission Flex Plate Cleaning And Inspection
- Piston And Connecting Rod Disassemble
- Piston, Connecting Rod, And Bearing Cleaning And Inspection
- Piston and Connecting Rod Assemble
- Camshaft Bearing Removal
- Camshaft And Bearings Cleaning and Inspection
- Camshaft Bearing Installation
- Camshaft Position Actuator Cleaning and Inspection
- Camshaft Position Actuator Magnet Cleaning and Inspection
- Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle)
- Camshaft Position Actuator Solenoid Valve Inspection (Off-Vehicle)
- Valve Rocker Arm And Push Rod Cleaning and Inspection
- Valve Lifters And Guides Cleaning and Inspection
- Cylinder Head Disassemble
- Cylinder Head Cleaning and Inspection
- Valve Guide Reaming, And Valve and Seat Grinding
- Cylinder Head Assemble
- Engine Oil Pump Disassemble
- Engine Oil Pump Cleaning and Inspection
- Engine Oil Pump Assemble
- Engine Front Cover Cleaning and Inspection
- Crankshaft Rear Oil Seal Housing Cleaning and Inspection
- Engine Block Valley Cover Cleaning and Inspection
- Valve Rocker Arm Cover Cleaning and Inspection
- Engine Oil Pan Cleaning and Inspection
- Intake Manifold Cleaning and Inspection
- Exhaust Manifold Cleaning and Inspection
- Engine Coolant Air Bleed Pipe and Hole Cover Cleaning and Inspection
- Water Pump Cleaning and Inspection
- Thread Repair
- Service Prior to Assembly
- Engine Block Plug Installation
- Crankshaft And Bearing Installation
- Piston, Connecting Rod, And Bearing Installation
- Camshaft Installation
- Camshaft Position Actuator And Solenoid Valve Installation
- Engine Oil Pump, Engine Oil Pump Screen and Crankshaft Oil Deflector Installation
- Crankshaft Rear Oil Seal Housing Installation (Without Seal in Housing)
- Crankshaft Rear Oil Seal Housing Installation (With Seal in Housing)
- Crankshaft Rear Oil Seal Installation
- Engine Front Cover Installation
- Crankshaft Front Oil Seal Installation
- Engine Oil Pan Installation
- Engine Oil Filter Installation
- Valve Lifter Installation
- Cylinder Head Installation - Left Side
- Cylinder Head Installation - Right Side
- Valve Rocker Arm And Push Rod Installation
- Valve Rocker Arm Cover Installation - Left Side
- Valve Rocker Arm Cover Installation - Right Side
- Engine Block Valley Cover Installation
- Engine Coolant Air Bleed Pipe and Hole Cover Installation
- Intake Manifold Installation
- Fuel Rail And Injectors Installation
- Throttle Body Installation
- Water Pump Installation
- Exhaust Manifold Installation - Left Side
- Exhaust Manifold Installation - Right Side
- Engine Oil Level Indicator And Engine Oil Level Indicator Tube Installation
- Automatic Transmission Flex Plate Installation
- Crankshaft Balancer Installation
- Engine Prelubing
- Description And Operation
- Crankcase Ventilation System Description
- Drive Belt System Description
- Engine Mechanical Component Description
- Camshaft Position Actuator and Solenoid Valve Description
- Engine Lubrication Description
- Cleanliness And Care
- Separating Parts
- Replacing Engine Gaskets
- Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
- Tools and Equipment
- Special Tools And Equipment
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.