Cadillac STS 2005-2011 4.6L Engine Specifications
Explore detailed technical specifications for the 4.6L V8 engine in the 2005-2011 Cadillac STS. Learn about horsepower, torque, fuel system, and maintenance tips for optimal performance and repair.
Overview Specifications
This document provides detailed specifications and technical information about the 4.6L engine used in the 2005-2011 Cadillac STS. It is designed to assist enthusiasts, mechanics, and owners in understanding the engine's features, performance, and maintenance requirements. The document is organized into sections for easy navigation, with subsections breaking down specific aspects of the engine. Use the search and navigation instructions to find the information you need quickly.
How to Use
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Key Specifications
Displacement
4.6L
Horsepower
320 hp
Torque
315 lb-ft
Fuel Type
Premium
Compression Ratio
10.5:1
Available Specifications
Engine Performance
This section covers the performance characteristics of the 4.6L engine, including horsepower, torque, and acceleration. It also provides insights into the engine's responsiveness and efficiency under various driving conditions.
Engine Performance
This section covers the performance characteristics of the 4.6L engine, including horsepower, torque, and acceleration. It also provides insights into the engine's responsiveness and efficiency under various driving conditions.
Power and Torque
- 320 horsepower at 6400 rpm
- 315 lb-ft of torque at 4400 rpm
- Optimized for high-end performance
- Smooth power delivery across the rev range
Acceleration
- 0-60 mph in 5.8 seconds
- Strong mid-range acceleration
- Responsive throttle response
- Excellent passing power on highways
Engine Design
This section delves into the design and engineering of the 4.6L engine, highlighting its advanced features, materials, and construction techniques that contribute to its reliability and performance.
Engine Design
This section delves into the design and engineering of the 4.6L engine, highlighting its advanced features, materials, and construction techniques that contribute to its reliability and performance.
Construction
- Aluminum block and heads for reduced weight
- Dual overhead camshafts (DOHC) design
- Four valves per cylinder
- Variable Valve Timing (VVT) for efficiency
Fuel System
- Sequential fuel injection
- Electronic throttle control
- Premium fuel recommended
- Optimized for fuel efficiency
Maintenance and Durability
This section provides information on the maintenance requirements and durability of the 4.6L engine, including recommended service intervals, common issues, and tips for extending engine life.
Maintenance and Durability
This section provides information on the maintenance requirements and durability of the 4.6L engine, including recommended service intervals, common issues, and tips for extending engine life.
Service Intervals
- Oil change every 7,500 miles
- Spark plug replacement every 100,000 miles
- Air filter inspection every 15,000 miles
- Coolant flush every 50,000 miles
Common Issues
- Timing chain tensioner wear over time
- Oil leaks from valve cover gaskets
- Cooling system component failures
- Regular maintenance reduces issues
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Engine Specifications
Overview
- Type
- V8
- Configuration
- Northstar DOHC
- Platform
- GM Sigma platform
- Material
- Aluminum block and heads
- Location
- Front-engine, rear-wheel drive/all-wheel drive
Dimensions
- Displacement
- 4.6 liters (4565 cc)
- Bore
- 93 mm (3.66 in)
- Stroke
- 84 mm (3.31 in)
- Length
- 740 mm (29.13 in)
- Width
- 680 mm (26.77 in)
- Height
- 620 mm (24.41 in)
- Weight
- 198 kg (436.5 lbs)
Materials
- Engine Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Performance
-
- 320 hp @ 6400 rpm
- 315 lb-ft torque @ 4400 rpm
- Dual overhead camshafts
- Variable valve timing
- Fuel System
-
- Sequential fuel injection
- Electronic throttle control
- Premium unleaded fuel required
- Cooling
-
- Liquid cooling system
- High-capacity radiator
- Dual electric fans
- Lubrication
-
- Wet sump oil system
- Synthetic oil recommended
- Oil cooler integrated
- Emissions
-
- Catalytic converters
- OBD-II diagnostics
- Low emissions certification
Safety Features
- Engine Management
-
- Knock sensor system
- Rev limiter
- Engine immobilizer
- Protection
-
- Oil pressure warning
- Coolant temperature warning
- Engine misfire detection
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Balanced rotating assembly
- Smoothness
-
- Dual-mass flywheel
- Precision-machined components
- Low vibration design
Accessories
- Engine Components
-
- High-flow air filter
- Performance exhaust system
- Upgraded ignition coils
- Monitoring
-
- Oil life monitor
- Engine diagnostics port
- Performance data recorder
- Cooling
-
- Auxiliary oil cooler
- Performance radiator
- Enhanced coolant system
Maintenance
- Service interval
- Every 7,500 miles or 12 months
- Service Items
-
- Oil and filter change
- Spark plug replacement
- Air filter inspection
- Coolant system check
- Timing belt inspection
- Fuel system cleaning
- Maintenance Notes
- Use synthetic 5W-30 oil. Regular coolant flushes recommended.
Warranty
- Basic
- Years: 4Miles: 50000Coverage: Bumper-to-bumper
- Powertrain
- Years: 6Miles: 70000Coverage: Engine and transmission
- Corrosion
- Years: 6Miles: 100000Coverage: Perforation only
- Roadside Assistance
- Years: 6Miles: 70000Coverage: 24/7 emergency services
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Casting for engine block
- CNC machining
- Automated assembly
- Quality Control
- inspection: 100% engine testingStandards: ISO 9001 certifiedTesting: Dyno and road testing
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission production
- Waste reduction initiatives
- Production Metrics
- Units Per Year: 50000Lead Time: 6 weeksYield Rate: 98.5%
Service Information for 4.6l engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect air filter
- Check coolant level
- Inspect belts and hoses
- Test battery
Use synthetic 5W-30 oil for optimal performance.
- Replace engine air filter
- Inspect spark plugs
- Check ignition system
- Inspect fuel system
- Test emissions system
Ensure all connections are tight and free of corrosion.
- Replace spark plugs
- Change coolant
- Inspect timing belt
- Check engine mounts
- Perform compression test
Timing belt replacement recommended at 100,000 miles.
Common Questions
Find answers to common questions about torque specifications
Q1 What are the key technical specifications of the 4.6L engine in the 2005-2011 Cadillac STS?
What are the key technical specifications of the 4.6L engine in the 2005-2011 Cadillac STS?
The 4.6L Northstar engine produces 320 horsepower at 6,400 rpm and 315 lb-ft of torque at 4,400 rpm. It features a 4.6-liter V8 configuration with variable valve timing and a 4-speed automatic transmission. Compatible with premium gasoline, it achieves an estimated 17 mpg combined. Ideal for 2005-2011 Cadillac STS models.
Q2 What is the recommended maintenance schedule for the 4.6L engine?
What is the recommended maintenance schedule for the 4.6L engine?
Regular maintenance includes oil changes every 5,000-7,500 miles using synthetic oil, tire rotations every 7,500 miles, and spark plug replacements at 100,000 miles. Inspect belts and hoses annually, and check coolant and transmission fluid levels regularly. Refer to the owner's manual for detailed schedules.
Q3 How do I replace the air filter in the 4.6L engine?
How do I replace the air filter in the 4.6L engine?
Locate the air filter housing on the driver's side. Release the clips, open the housing, and pull out the old filter. Insert the new filter, ensuring it's properly seated. Close the housing and secure it with clips. Start the engine to check for any leaks or unusual noises.
Q4 How can I troubleshoot common issues with the 4.6L engine?
How can I troubleshoot common issues with the 4.6L engine?
For issues like rough idling, check the air filter, spark plugs, and engine error codes using an OBD-II scanner. Low performance may indicate a faulty oxygen sensor or clogged fuel injector. Always refer to the service manual for accurate diagnostics.
Q5 What can I do to optimize the performance of the 4.6L engine?
What can I do to optimize the performance of the 4.6L engine?
Use high-octane fuel and regularly tune-up with spark plug and fuel injector cleaning. Ensure proper wheel alignment and tire pressure. Avoid excessive loads and consider a performance air intake for better airflow.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Cadillac STS 4.6L Engine Service Manual
Coming SoonComprehensive guide covering maintenance and repair procedures for the 4.6L engine.
Technical Bulletin: Engine Performance Update
Coming SoonProvides updates and diagnostics for improving engine performance and reliability.
Cadillac STS Parts Catalog
Coming SoonDetailed list of Genuine GM parts for the 4.6L engine and related components.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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