🏷️ Basic Information

Make:

Jaguar

Model:

XK120 Series

Product Name:

JAGUAR MKV11 XK120 Series Full Service & Repair Manual

Series Designation:

XK120 Series (Often colloquially referred to as XK120, XK140, and XK150 series, although the manual explicitly mentions 'XK120 Series' and 'MKV11' suggesting a potential broader coverage or specific edition referencing the MkVII saloon's influence or a particular generation designation within the XK family.)

Chassis Codes:

XK120: XK120, XK120 FHC, XK120 DHC, XK120 OTS (Open Two Seater). The 'MKV11' reference is unusual for an XK, as MkVII, MkVIII, and MkIX were saloons. It might indicate a specific variant or a cross-reference to the era of Jaguar saloons.

👋 Introduction

Target Audience:

Owners and mechanics working on Jaguar XK120 series vehicles, especially those undertaking restoration or in-depth maintenance.

Value Proposition:

Provides comprehensive factory-level repair data without recurring costs, offering a complete solution for vehicle maintenance and restoration.

Visual Aids:

Detailed photos and diagrams, exploded views.

Instructional Style:

Step-by-step instructions.

📋 Manual Details

General Coverage:

All repairs, servicing, and troubleshooting procedures.

Estimated Pages:

Hundreds of pages (specific number not provided, but implied to be extensive).

Type:

Factory Service Repair Workshop Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Mechanical Systems:

Engine overhaul, fuel system, ignition system, cooling system, lubrication system, exhaust system.

Drivetrain Systems:

Clutch, gearbox (manual transmission), driveshaft, rear axle and differential.

Suspension Steering:

Front suspension (independent), rear suspension (live axle), steering gear and linkages.

Braking Systems:

Hydraulic drum brakes (front and rear), brake system maintenance and repair.

Electrical Systems:

Starting system, charging system (generator), lighting, instrumentation, ignition wiring, accessory circuits.

Bodywork Chassis:

Chassis frame, body panels, doors, trim, convertible top mechanisms (for DHC and OTS variants).

Routine Maintenance:

Oil changes, lubrication points, filter replacements, spark plug servicing, ignition timing adjustment, brake adjustments.

Troubleshooting:

Diagnostic procedures for common and uncommon faults across all major systems.

Major Repairs:

Engine rebuilds, gearbox overhauls, suspension component replacement, brake caliper/wheel cylinder servicing.

Component Overhaul:

Detailed instructions for disassembling, inspecting, repairing, and reassembling major components.

Depth:

Comprehensive, covering everything from basic adjustments to complete engine and gearbox rebuilds. Suitable for professional mechanics and serious enthusiasts.

📊 Manual Specifications

Format Type:

PDF

Searchable Text:

Implied (standard for professional digital manuals).

Printability:

Printable (single pages or entire manual).

Binding:

Not Applicable (Digital Download).

Paper Quality:

Not Applicable (Digital Download).

Usage Rights:

Unlimited use on multiple devices, no expiry dates, no renewal fees.

Operating Systems:

Windows and MAC compatible.

⚙️ Engine Specifications

Engine Type:

Inline 6-Cylinder, DOHC (Dual Overhead Camshaft)

Displacement:

3442 cc (3.4 Liters)

Bore X Stroke:

83 mm x 106 mm

Horsepower Stock:

160 bhp (119 kW) at 5,000 rpm (standard XK120)

Torque Stock:

205 lb-ft (278 Nm) at 3,000 rpm (standard XK120)

Compression Ratio Stock:

7.5:1 (standard XK120)

Carburetors:

Twin SU H4 carburetors (standard)

Fuel Type:

Premium Unleaded Gasoline (historically, leaded gasoline was used; manual will specify octane and lead additive recommendations for period-correct fuel).

Fuel Pump:

Mechanical fuel pump

Block Material:

Cast Iron

Cylinder Head Material:

Aluminum Alloy

🔧 Transmission

Transmission Type:

4-Speed Manual Transmission (Moss Gearbox)

Optional Gearbox:

None offered from factory for XK120 series.

Gear Ratios:

Specific ratios provided in manual (e.g., 3.64:1, 2.44:1, 1.55:1, 1.00:1 for top gear).

Gearbox Oil Type:

Gear oil, typically GL-4 rated SAE 80W-90 or SAE 90. Manual will specify exact grade.

Clutch Type:

Single dry plate, hydraulically operated.

📐 Dimensions

Wheelbase:

Approx. 102 inches (2591 mm)

Overall Length:

Approx. 168 inches (4267 mm)

Overall Width:

Approx. 62 inches (1575 mm)

Overall Height:

Approx. 50 inches (1270 mm) (OTS)

Curb Weight:

Approx. 2,900 - 3,200 lbs (1315 - 1451 kg) depending on body style.

Wheel Size:

16 inch steel wheels

Bolt Pattern:

5 x 4.5 inches (114.3 mm)

Tire Size Stock:

6.70 x 16 or 6.00 x 16 (depending on model variant)

🛡️ Safety Features

Crash Safety Era:

Designed to 1950s safety standards; lacked modern safety features like airbags, ABS, or crumple zones.

Braking System:

Hydraulic drum brakes on all wheels, with effective brake balancing being a key maintenance point.

Seatbelts:

Not standard equipment from factory; often retrofitted during restoration.

Chassis Construction:

Body-on-frame construction with a separate steel chassis for structural rigidity.

💡 Technology Features

Audio System:

Original equipment typically a period radio (e.g., Lucas, Becker), often optional. Manual may cover basic radio repair or antenna systems.

Assistance Systems:

None from factory. Driving dynamics rely on chassis and suspension tuning.

Connectivity Features:

None.

🔧 Maintenance

Oil Change Interval:

Typically every 2,000-3,000 miles or 3-6 months, depending on usage. Manual will provide precise figures.

Grease Points:

Regular lubrication of suspension, steering, and chassis points is critical. Intervals usually weekly or monthly for heavy use.

Engine Oil Type:

API SC/SD or equivalent. Viscosity typically SAE 20W-50 or SAE 30, especially for older engines or warmer climates. Manual will specify.

Engine Oil Capacity:

Approx. 11 pints (5.2 Liters) including filter.

Coolant Type:

Distilled water with anti-corrosion additive (e.g., Ethylene Glycol based antifreeze for protection). Manual will specify mix ratio.

Brake Fluid Type:

DOT 3 or DOT 4 hydraulic brake fluid (manual will confirm specific type required).

Engine Wear:

Potential for camshaft lobe wear, crankshaft bearing wear, oil leaks from main seals and gaskets. Valve stem oil seals can deteriorate.

Chassis Corrosion:

Rust is a common concern, particularly in sills, wheel arches, and floor pans, due to the body-on-frame construction and period materials.

Electrical Reliability:

Original wiring looms can be brittle and prone to failure. Generator charging system may be less robust than modern alternators.

Transmission Synchromesh:

Synchromesh rings in the Moss gearbox can wear, leading to difficult or notchy gear changes. Double-clutching is often recommended.

Ignition Spark Plugs:

Champion N5, Lodge 2HL (or equivalent specified in manual).

Oil Filter:

Coopers/Donut type canister filter. Specific part numbers vary by manufacturer (e.g., Fram PH45, Wix 51020 equivalent).

📚 Vehicle History

Manufacturer:

Jaguar Cars Ltd.

Founder:

Sir William Lyons

Predecessor:

Jaguar SS100

Successor:

Jaguar XK140, XK150

Production Years:

1948-1954

Production Locations:

Coventry, England

Body Styles:

Open Two Seater (OTS), Fixed Head Coupe (FHC), Drop Head Coupe (DHC).

Significance:

Jaguar's first sports car post-WWII; established Jaguar's reputation for performance, style, and value.

🏆 Awards & Recognition

Performance Reputation:

Widely celebrated for its speed and handling, often winning rallies and races in its era. Its 120 mph top speed was groundbreaking.

Design Acclaim:

Praised for its elegant and iconic British sports car styling, influencing automotive design.

Heritage Status:

Recognized as a significant classic car, highly sought after by collectors and enthusiasts worldwide.