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 MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 273 (ENGINE MECHANICAL - 3.8L)
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Section 273 (Engine Mechanical - 3.8L)
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Section 273 (Engine Mechanical - 3.8L)
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- 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
- Oil Leak Diagnosis
- Crankcase Ventilation System Inspection/Diagnosis
- Drive Belt Chirping Diagnosis
- Drive Belt Squeal Diagnosis
- Drive Belt Whine Diagnosis
- Drive Belt Rumbling Diagnosis
- Drive Belt Vibration Diagnosis
- Drive Belt Falls Off Diagnosis
- Drive Belt Excessive Wear Diagnosis
- Drive Belt Tensioner Diagnosis
- Repair Instructions
- On-Vehicle Repair Instructions
- Replacing Fuel Injector Sight Shield
- Replacing Drive Belt (L26)
- Replacing Drive Belt Tensioner
- Replacing Upper Drive Belt Idler Pulley
- Replacing Lower Drive Belt Idler Pulley
- Replacing Drive Belt Idler Pulley Bracket
- Installing Engine Support Fixture
- Replacing Front Engine Mount
- Replacing Front Engine Mount Bracket
- Replacing Right Engine Mount Strut
- Replacing Left Engine Mount Strut
- Replacing Left Engine Mount Strut Bracket
- Replacing Right Engine Mount Strut Bracket (L26)
- Replacing Engine Mount Strut Bracket - Upper Radiator Support
- Replacing Positive Crankcase Ventilation (PCV) Valve (L26)
- Replacing Oil Level Indicator and Tube
- Replacing Intake Manifold - Upper
- Replacing Intake Manifold - Lower
- Replacing Valve Rocker Arm Cover - Left
- Replacing Valve Rocker Arm Cover - Right
- Replacing Valve Rocker Arm and Push Rod
- Replacing Valve Stem Oil Seal & Valve Spring
- Replacing Valve Lifter
- Replacing Crankshaft Balancer
- Replacing Crankshaft Front Oil Seal
- Replacing Engine Front Cover
- Replacing Oil Pump Cover & Gear Set
- Replacing Oil Filter Adapter and Bypass Valve Assembly
- Replacing Timing Chain & Sprockets
- Replacing Cylinder Head - Left
- Replacing Cylinder Head - Right
- Replacing Oil Pan
- Replacing Engine Oil Pressure Sensor and/or Switch
- Replacing Engine Oil Level Sensor and/or Switch
- Replacing Oil Pump Pipe & Screen Assembly
- Replacing Connecting Rod Bearing
- Replacing Engine Flywheel
- Replacing Crankshaft Rear Oil Seal
- Replacing Crankshaft Rear Oil Seal & Housing
- Replacing Engine
- Replacing Engine Oil & Oil Filter
- Rotating the Engine for Service Access
- Off-Vehicle Repair Instructions
- Draining Fluids & Removing Oil Filter
- Removing Crankshaft Balancer
- Removing Engine Flywheel
- Removing Drive Belt Tensioner
- Removing Drive Belt Idler Pulley
- Removing Oil Level Indicator & Tube
- Removing Water Outlet and Thermostat (L26)
- Removing Water Pump
- Removing Intake Manifold - Upper
- Removing Exhaust Gas Recirculation (EGR) & EGR Pipe
- Removing Intake Manifold - Lower (L26)
- Removing Exhaust Manifold - Left
- Removing Exhaust Manifold - Right (Without Secondary Air Injection-SAI)
- Removing Exhaust Manifold - Right (With Secondary Air Injection-SAI)
- Removing Valve Rocker Arm Cover - Left
- Removing Valve Rocker Arm Cover - Right
- Removing Valve Rocker Arm & Push Rod
- Removing Cylinder Head - Left
- Removing Cylinder Head - Right
- Removing Valve Lifter
- Removing Oil Pan
- Removing Oil Pump Pipe and Screen Assembly
- Removing Crankshaft Front Oil Seal
- Removing Engine Front Cover
- Removing Oil Filter Adapter
- Removing Timing Chain and Sprockets (L26)
- Removing Balance Shaft
- Removing Camshaft
- Removing Crankshaft Rear Oil Seal & Housing (Second Design)
- Removing Piston, Connecting Rod & Bearing
- Removing Crankshaft and Bearings
- Removing Engine Block Plug
- Removing Camshaft Bearing
- Removing Balance Shaft Bearing And/Or Bushing
- Engine Block Cleaning & Inspection
- Cylinder Boring and Honing
- Crankshaft and Bearings Cleaning & Inspection
- Crankshaft Balancer Cleaning & Inspection
- Engine Flywheel Cleaning & Inspection
- Disassembling Piston & Connecting Rod
- Piston, Connecting Rod & Bearings Cleaning & Inspection
- Assembling Piston & Connecting Rod
- Camshaft and Bearings Cleaning & Inspection
- Timing Chain and Sprockets Cleaning & Inspection (L26)
- Valve Rocker Arm and Push Rods Cleaning & Inspection
- Valve Lifters and Guides Cleaning & Inspection
- Disassembling Cylinder Head
- Cylinder Head Cleaning & Inspection
- Grinding Valve Guide Reaming/Valve & Seat
- Assembling Cylinder Head
- Disassembling Oil Pump
- Oil Pump Cleaning & Inspection
- Engine Front Cover Cleaning & Inspection
- Assembling Oil Pump
- Valve Rocker Arm Cover Cleaning & Inspection
- Oil Pan Cleaning & Inspection
- Intake Manifold Cleaning & Inspection - Upper
- Intake Manifold Cleaning & Inspection - Lower (L26)
- Exhaust Manifold Cleaning & Inspection
- Water Pump Cleaning & Inspection
- Balance Shaft Cleaning & Inspection
- Thread Repair
- Servicing Prior to Assembly
- Installing Balance Shaft Bearing And/Or Bushing
- Installing Camshaft Bearing
- Installing Engine Block Plug
- Installing Crankshaft And Bearings
- Installing Piston, Connecting Rod & Bearing
- Installing Crankshaft Rear Oil Seal & Housing (Second Design)
- Installing Camshaft
- Installing Balance Shaft
- Installing Timing Chain & Sprockets (L26)
- Installing Engine Front Cover
- Installing Crankshaft Front Oil Seal
- Installing Oil Filter Adapter
- Installing Oil Pump Pipe & Screen Assembly
- Installing Oil Pan
- Installing Valve Lifter
- Installing Cylinder Head - Right
- Installing Cylinder Head - Left
- Installing Valve Rocker Arm & Push Rod
- Installing Valve Rocker Arm Cover - Right
- Installing Valve Rocker Arm Cover - Left
- Installing Exhaust Manifold - Right (Without Secondary Air Injection-SAI)
- Installing Exhaust Manifold - Right (With Secondary Air Injection-SAI)
- Installing Exhaust Manifold - Left
- Installing Intake Manifold - Lower (L26)
- Installing Exhaust Gas Recirculation (EGR) & EGR Pipe
- Installing Intake Manifold - Upper
- Installing Water Pump
- Installing Water Outlet & Thermostat (L26)
- Installing Oil Level Indicator & Tube
- Installing Drive Belt Idler Pulley
- Installing Drive Belt Tensioner
- Installing Engine Flywheel
- Installing Crankshaft Balancer
- Prelubing Engine
- On-Vehicle Repair Instructions
- Description and Operation
- 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.