Cadillac STS 1998-2004 4.6L Engine Specifications
Explore the detailed 4.6L engine specifications for the 1998-2004 Cadillac STS. This guide covers key performance metrics, maintenance tips, and part compatibility to help you understand and service your vehicle effectively.
Overview Specifications
This document provides detailed specifications and technical information about the 4.6L engine used in the 1998-2004 Cadillac STS. It is designed to assist enthusiasts, mechanics, and owners in understanding the engine's features, performance, and maintenance requirements. The content is organized into sections for easy navigation and includes a quick reference guide for key specifications. Use the search and navigation instructions to find specific details efficiently.
How to Use
Use the search functionality to quickly locate specific terms or topics within the document. Enter keywords related to the engine, such as 'horsepower' or 'torque,' and the system will highlight relevant sections.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is clearly labeled, and subsections provide detailed information on specific aspects of the 4.6L engine.
Key Specifications
Horsepower
300 hp @ 6000 rpm
Torque
295 lb-ft @ 4400 rpm
Displacement
4.6L (281 cu in)
Compression Ratio
10.3:1
Fuel Efficiency
20 MPG (combined)
Available Specifications
Engine Performance
This section covers the performance characteristics of the 4.6L engine, including horsepower, torque, and fuel efficiency. It also provides insights into how these factors contribute to the overall driving experience of the Cadillac STS.
Engine Performance
This section covers the performance characteristics of the 4.6L engine, including horsepower, torque, and fuel efficiency. It also provides insights into how these factors contribute to the overall driving experience of the Cadillac STS.
Horsepower and Torque
- Horsepower: 300 hp @ 6000 rpm
- Torque: 295 lb-ft @ 4400 rpm
- Engine redline: 6500 rpm
- Peak power band: 4500-6000 rpm
- Acceleration: 0-60 mph in 6.5 seconds
- Top speed: 150 mph (electronically limited)
Fuel Efficiency
- City MPG: 17
- Highway MPG: 25
- Combined MPG: 20
- Fuel tank capacity: 18.5 gallons
- Fuel type: Premium unleaded recommended
- Emissions: Meets ULEV standards
Engine Design
This section delves into the design features of the 4.6L engine, including its architecture, materials, and advanced technologies. Learn about the engineering behind this V8 powerplant and how it enhances durability and performance.
Engine Design
This section delves into the design features of the 4.6L engine, including its architecture, materials, and advanced technologies. Learn about the engineering behind this V8 powerplant and how it enhances durability and performance.
Architecture
- Engine type: V8
- Displacement: 4.6 liters (281 cubic inches)
- Bore x Stroke: 3.66 in x 3.39 in
- Compression ratio: 10.3:1
- Valvetrain: DOHC, 4 valves per cylinder
- Block material: Cast aluminum
Technologies
- Variable Valve Timing (VVT)
- Sequential fuel injection
- Electronic throttle control
- Knock sensor system
- High-flow intake manifold
- Dual exhaust system
Maintenance and Reliability
This section provides essential information on maintaining the 4.6L engine, including service intervals, common issues, and tips for ensuring long-term reliability. Use this guide to keep your Cadillac STS running smoothly.
Maintenance and Reliability
This section provides essential information on maintaining the 4.6L engine, including service intervals, common issues, and tips for ensuring long-term reliability. Use this guide to keep your Cadillac STS running smoothly.
Service Intervals
- Oil change: Every 5,000 miles or 6 months
- Spark plugs: Every 100,000 miles
- Timing chain: Lifetime (no replacement needed under normal conditions)
- Air filter: Every 30,000 miles
- Coolant flush: Every 50,000 miles
- Fuel filter: Every 30,000 miles
Common Issues
- Oil leaks from valve cover gaskets
- Ignition coil failures
- Throttle body sensor malfunctions
- Coolant leaks from intake manifold gaskets
- Worn engine mounts
- Carbon buildup on intake valves
Search Specifications
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Engine Specifications
Overview
- Type
- V8
- Configuration
- Northstar
- Platform
- Longitudinal
- Material
- Aluminum block and heads
- Location
- Front engine, rear-wheel drive
Dimensions
- Length
- 28.7 inches (729 mm)
- Width
- 24.3 inches (617 mm)
- Height
- 29.1 inches (739 mm)
- Displacement
- 4.6 liters (4565 cc)
- Bore
- 3.66 inches (93 mm)
- Stroke
- 3.31 inches (84 mm)
- Weight
- 450 lbs (204 kg)
Materials
- Engine Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Performance
-
- Dual overhead camshafts
- 32-valve configuration
- Sequential fuel injection
- Variable valve timing
- Cooling
-
- Liquid cooling system
- High-capacity radiator
- Electric cooling fans
- Ignition
-
- Coil-on-plug ignition
- Distributorless ignition system
- High-energy spark plugs
- Emissions
-
- Catalytic converters
- EGR system
- OBD-II compliance
- Lubrication
-
- Full-pressure oil system
- Oil cooler
- High-capacity oil pump
Safety Features
- Engine Management
-
- Knock sensor
- Overheat protection
- Low oil pressure warning
- Emissions Control
-
- Catalytic converter monitoring
- Evaporative emissions system
Comfort Features
- Noise Reduction
-
- Acoustic engine covers
- Balanced rotating assembly
- Vibration Control
-
- Hydraulic engine mounts
- Counterbalanced crankshaft
Accessories
- Belts And Pulleys
-
- Serpentine belt
- Tensioner pulley
- Idler pulley
- Filters
-
- Oil filter
- Air filter
- Fuel filter
- Sensors
-
- Oxygen sensor
- Crankshaft position sensor
- Camshaft position sensor
Maintenance
- Service interval
- 7500 miles or 6 months
- Service Items
-
- Oil and filter change
- Air filter inspection
- Spark plug inspection
- Coolant level check
- Belt and hose inspection
- Maintenance Notes
- Use synthetic oil for optimal performance
Warranty
- Basic
- 3 years or 36,000 miles
- Powertrain
- 5 years or 60,000 miles
- Emissions
- 8 years or 80,000 miles
- Corrosion
- 6 years or 100,000 miles
- Warranty Terms
- Transferable with ownership
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Casting of aluminum block and heads
- Precision machining
- Assembly line integration
- Quality Control
- Engine Testing: Dyno testingLeak Testing: Coolant and oil systemsFinal Inspection: Visual and functional checks
- Sustainability Practices
-
- Recycling of aluminum scrap
- Use of low-emission coatings
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 500Defect Rate: 0.1%Production Years: 1998-2004
Service Information for 4.6l engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Air filter inspection
- Spark plug inspection
- Coolant level check
- Belt and hose inspection
Use synthetic oil for optimal performance
- Replace air filter
- Replace fuel filter
- Inspect and adjust valve clearance
- Check and top off all fluids
Check for any leaks or unusual noises
- Replace spark plugs
- Replace timing belt
- Replace water pump
- Flush and replace coolant
Critical to prevent engine damage
Common Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the 4.6L engine in the 1998-2004 Cadillac STS?
What are the technical specifications of the 4.6L engine in the 1998-2004 Cadillac STS?
The 4.6L engine in the 1998-2004 Cadillac STS is a Northstar V8 engine, producing 275-300 horsepower and 295-300 lb-ft of torque. It features a 4.6-liter displacement, DOHC design, and sequential fuel injection. It is compatible with premium unleaded gasoline and is paired with a 4-speed automatic transmission.
Q2 What are the maintenance requirements for the 4.6L engine?
What are the maintenance requirements for the 4.6L engine?
Regular maintenance for the 4.6L engine includes oil changes every 5,000-7,500 miles using synthetic oil, tire rotations, and inspections of belts and hoses. Spark plugs should be replaced every 100,000 miles, and the coolant should be changed every 50,000 miles. Follow the recommended schedule in the owner's manual for optimal performance.
Q3 How do I install or replace parts on the 4.6L engine?
How do I install or replace parts on the 4.6L engine?
When replacing parts, ensure you have the correct tools and consult the service manual. Disconnect the battery before starting. Follow proper torque specifications and reassemble in the reverse order of disassembly. If unsure, seek professional assistance to avoid damage or injury.
Q4 How do I troubleshoot common issues with the 4.6L engine?
How do I troubleshoot common issues with the 4.6L engine?
Common issues include rough idling or low power. Check the error codes with an OBD-II scanner. Inspect sensors, spark plugs, and fuel injectors. Consult the service manual for diagnostic procedures and address any issues promptly to prevent further damage.
Q5 How can I optimize the performance of the 4.6L engine?
How can I optimize the performance of the 4.6L engine?
Optimize performance with regular tune-ups, air filter replacements, and high-octane fuel. Ensure proper ignition timing and consider a performance exhaust system. Avoid aggressive modifications without professional guidance to maintain reliability.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1998-2004 Cadillac STS Service Manual
Coming SoonComprehensive guide covering maintenance and repair procedures for the 4.6L engine.
Technical Bulletin: Engine Performance Update
Coming SoonAddresses common issues and updates for the 4.6L engine.
Cadillac STS Parts Catalog
Coming SoonList of compatible parts and accessories for the 4.6L engine.
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The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
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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