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Jaguar

Jaguar 420G S-TYPE 1966 1967 1968 1969 1970 Service Repair Manual

Jaguar 420G S-TYPE 1966 1967 1968 1969 1970 Service Repair Manual

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Vehicle data plateRef 425930
Brand
Jaguar
Vehicle
Cars
Models covered
420G, Parts Catalogue, S-TYPE
Years
1966, 1967, 1968, 1969, 1970
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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🏷️ Basic Information
Identification
Make:
Jaguar
Model:
420G S-TYPE
Model Code:
420G
Generation:
First Generation (Jaguar 420G)
Production Years:
1966-1970
Codes
Vehicle Platform:
Jaguar "420" platform
👋 Introduction
Market Position
Segment:
Luxury Saloon
Target Audience:
Luxury car buyers, executives, and those seeking a comfortable, high-performance touring vehicle.
Competitive Analysis
Competitors:
Primarily competed against other high-end European sedans of the era, such as Mercedes-Benz, BMW, and Rolls-Royce (in certain aspects).
Key Features
Engine Variant:
Powered by Jaguar's renowned 4.2-liter DOHC inline-six engine.
Drivetrain:
Rear-wheel drive
Transmission Options:
Available with a manual gearbox or a Borg-Warner automatic transmission.
Suspension:
Independent suspension front and rear, contributing to its renowned ride quality.
Design:
Elegant styling based on the Jaguar 420, featuring a longer wheelbase and improved rear passenger space, hence the 'G' designation.
📋 Manual Details
Coverage Areas
Vehicle Coverage:
Jaguar 420G S-TYPE models from 1966 to 1970
Page Count
Page Count:
373
Manual Type
Manual Type:
Workshop Service Repair Manual
Language
Language:
English
Format
File Format:
PDF
Accessibility
Download Type:
Instant Download
📖 Manual Coverage
Systems Covered
Engine:
Detailed coverage including disassembly, assembly, adjustments, and troubleshooting of the XK engine family.
Transmission:
Service procedures for both manual and automatic transmissions used in the 420G S-TYPE.
Fuel System:
Comprehensive details on carburetors (likely SU HD8 or Zenith Stromberg), fuel pumps, lines, and tank.
Cooling System:
Radiator, fan, water pump, thermostat, and coolant passages.
Exhaust System:
Exhaust manifolds, pipes, mufflers, and hangers.
Ignition System:
Distributor, coil, spark plugs, ignition timing, and wiring.
Electrical System:
Wiring diagrams, starter, alternator/generator, battery, lighting, gauges, and ancillary electrical components.
Braking System:
Hydraulic system, master cylinder, brake boosters (likely Girling hydro-vac), calipers, pads, discs, and parking brake.
Suspension System:
Front independent suspension (wishbones, coil springs, telescopic dampers), rear independent suspension (IRS with trailing arms, half shafts, dampers, springs).
Steering System:
Power steering system (likely Burman or Marles), steering column, linkages, and wheel.
Bodywork And Chassis:
Body panel repair, door mechanisms, glass, seals, chassis lubrication points, and structural components.
Interior:
Seating, dashboard, trim panels, heating, ventilation, and climate control components.
Procedures Included
Maintenance:
Regular servicing, fluid changes, filter replacements, lubrication, and inspections.
Troubleshooting:
Diagnosis of common problems, symptom-based fault finding, and corrective actions.
Repair:
Step-by-step repair procedures for virtually all mechanical and electrical components.
Disassembly Assembly:
Detailed instructions for removing, dismantling, and reassembling components.
Adjustments:
Precise instructions for setting clearances, timings, pressures, and other critical adjustments.
Installation:
Procedures for installing new or reconditioned parts.
Technical Depth
Depth:
Comprehensive, bumper-to-bumper coverage suitable for professional mechanics and experienced DIY enthusiasts.
Diagnostics:
Includes diagnostic procedures, troubleshooting charts, and expected performance values.
Specifications:
Provides essential technical data, service specifications, and allowable limits.
Illustrations
Pictorial Diagrams:
Extensive use of step-by-step explanations, pictorial diagrams, exploded diagrams, drawings, and photos.
Special Tools
Tool References:
References to specific Jaguar service tool numbers and illustrations of tools in use.
📊 Manual Specifications
File Format
File Quality:
High-quality PDF, printable, zoomable.
Print Quality
Printability:
All pages are printable.
Compatibility
Operating Systems:
Compatible with Windows, Mac, and Linux operating systems.
Requirements
Software Requirement:
Requires Adobe Reader for viewing.
Completeness
Integrity:
100% complete and intact, no missing or corrupt pages/sections.
⚙️ Engine Specifications
Primary Engine
Engine Type:
Jaguar XK DOHC Inline-6
Displacement:
4.2 Liters (4235 cc)
Bore X Stroke:
92.07 mm x 106.0 mm (3.625 in x 4.173 in)
Compression Ratio:
8.0:1 or 9.0:1 (depending on market and tune)
Valve Train:
Dual Overhead Camshafts (DOHC), 2 valves per cylinder
Performance
Horsepower:
Approximately 245 bhp (183 kW) at 5500 rpm
Torque:
Approximately 283 lb-ft (384 Nm) at 3750 rpm
Fuel System
Carburetion:
Twin SU HD8 or Zenith Stromberg CD carburettors
Fuel Type:
Unleaded gasoline (later models) or Leaded gasoline (early models)
Lubrication
Oil Capacity:
Approximately 7 U.S. quarts (6.6 liters) including filter
Recommended Oil Grade:
Refer to manual for specific viscosities (e.g., SAE 20W50 for warmer climates, SAE 10W/30 for cooler climates)
🔧 Transmission
Standard
Standard Transmission Type:
4-speed Manual with Overdrive (Laycock De Normanville Type J)
Optional
Optional Transmission Type:
3-speed Borg-Warner Model 8 Automatic Transmission
Features
Overdrive Engagement:
Electrically operated, typically via a switch on the gear lever or dashboard.
Fluid Specifications
Automatic Transmission Fluid:
Refer to manual for specific fluid type (likely Dexron II or equivalent for Borg-Warner).
Manual Transmission Oil:
Refer to manual for specific oil type (e.g., GL-4 gear oil).
📐 Dimensions
Exterior
Wheelbase:
113 inches (2870 mm)
Length:
196 inches (4978 mm)
Width:
69.5 inches (1765 mm)
Height:
53.5 inches (1359 mm)
Weights
Curb Weight:
Approximately 3,800 - 4,000 lbs (1724 - 1814 kg)
Gross Vehicle Weight Rating:
Refer to specific vehicle data plate or manual.
🛡️ Safety Features
Ratings
Crash Safety:
No official crash test ratings available from modern agencies due to the era of manufacture. Safety features were typical of luxury cars of the mid-to-late 1960s.
Active Features
Brakes:
Four-wheel Dunlop disc brakes with servo assistance (Girling system).
Steering:
Power-assisted steering for improved maneuverability and control.
Passive Features
Seatbelts:
Provision for seatbelts, often fitted as standard or optional equipment depending on the market and year.
Body Construction:
Robust steel body-on-frame construction typical of the era, providing a significant safety cage.
Safety Equipment:
Safety glass, padded dashboard, collapsible steering column (design dependent on specific year).
💡 Technology Features
Infotainment
Audio System:
Original equipment likely featured a period-appropriate AM/FM radio, with optional stereo systems available in later years.
Driver Assistance
Steering:
Power steering was a significant technological feature for the era, enhancing ease of driving.
Comfort Features
Climate Control:
Optional air conditioning systems were available, often integrated into the dash.
Seating:
Often featured leather upholstery and individual front seats for comfort.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 3,000-5,000 miles (4,800-8,000 km) or 6 months, as per manual recommendations.
Major Service Interval:
Annual service recommended, with more comprehensive checks at 12,000-18,000 miles (19,000-29,000 km).
Fluid Specifications
Coolant Type:
Ethylene Glycol based antifreeze mixture with water (50/50 recommended).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (confirm in manual).
Power Steering Fluid:
Refer to manual for specific type, typically automatic transmission fluid or specialized power steering fluid.
Known Issues
Common Problems:
Rust in common areas (wheel arches, sills, boot floor), potential for oil leaks from engine and gearbox, cooling system overheating if not maintained, wear in suspension bushings and steering components, electrical gremlins due to age.
Preventative Maintenance
Recommendations:
Regular lubrication of suspension and steering components, checking and topping up fluids, inspecting braking system, ensuring cooling system is efficient, monitoring for any signs of rust.
Parts Replacement
Fasteners:
Emphasis on using correct OEM fasteners and torque specifications for reliability and safety.
📚 Vehicle History
Brand Heritage
Heritage:
Jaguar Cars is renowned for its blend of performance, luxury, and elegant styling, with a rich motorsport heritage.
Model Evolution
Predecessors:
Evolved from the Jaguar S-Type and the Jaguar 420, sharing significant chassis and powertrain components with the Jaguar XJ6 Series I.
Design Philosophy:
Designed to offer spacious luxury combined with Jaguar's characteristic sporting driving experience, positioned above the Mark 2 but below the flagship XJ6.
Production
Production Location:
Coventry, England
Production Volume:
Estimated around 7,700 units produced.
🏆 Awards & Recognition
Recognitions
General Reputation:
While specific awards might not be documented for this individual model, the Jaguar marque consistently received acclaim for its engineering, design, and performance throughout its history.

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