The Jaguar XK120 Series, produced from 1948 to 1954, represents a landmark in post-war automotive design, celebrated for its exceptional performance, elegant styling, and groundbreaking 120 mph top speed. This iconic British sports car, available in Open Two Seater (OTS), Fixed Head Coupe (FHC), and Drop Head Coupe (DHC) body styles, established Jaguar's reputation for blending speed with luxurious aesthetics. Powered by a potent 3.4-liter DOHC inline-six engine, the XK120 offered exhilarating driving dynamics, making it a dominant force in motorsport and a highly desirable vehicle for enthusiasts of its era. Its robust chassis and advanced engineering for the time contributed to its enduring appeal and status as a significant classic car.
This comprehensive factory service repair workshop manual provides in-depth guidance for all repairs, servicing, and troubleshooting procedures for the Jaguar XK120 Series. Covering mechanical systems such as the engine, drivetrain, suspension, steering, braking, and electrical systems, as well as bodywork and chassis, this manual details routine maintenance, component overhauls, and major repairs. With step-by-step instructions, detailed photos, diagrams, and exploded views, it serves as an essential resource for owners and mechanics undertaking maintenance, restoration, or repair work, ensuring the longevity and optimal performance of these classic vehicles.
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.
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.
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
Format:
Digital Download (PDF)
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.
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 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 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.
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)
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.
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.
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).
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.
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.
