Market Segment:
        
        
            Post-War Luxury Sports Car
        
     
    
    
        
            Key Competitors:
        
        
            Ferrari 166 Inter, Aston Martin DB2, Alfa Romeo 6C series
        
     
    
    
        
            Performance Benchmark:
        
        
            World's fastest production car upon its release, renowned for its straight-six engine and elegant design.
        
     
    
        
            Design Philosophy:
        
        
            Combination of powerful performance, luxurious touring comfort, and timeless styling.
        
     
    
    
        
            Value Proposition:
        
        
            Essential resource for owners and mechanics undertaking maintenance, restoration, or repair of these iconic classic Jaguars.
        
     
 
    
    
    
        
            Engine:
        
        
            Detailed overhaul, tuning, and troubleshooting for all XK engine variants
        
     
    
        
            Carburetor Fuel System:
        
        
            SU Carburetor (e.g., H, HD, HV) tuning, rebuild, fuel pump, and tank service
        
     
    
        
            Cooling System:
        
        
            Radiator, water pump, thermostat, hoses, and coolant specifications
        
     
    
        
            Clutch:
        
        
            Single dry plate clutch service, adjustment, and replacement
        
     
    
        
            Gearbox:
        
        
            Moss (pre-synchromesh and full synchromesh) and Laycock de Normanville overdrive gearbox service, repair, and fluid specifications
        
     
    
        
            Propeller Shaft:
        
        
            U-joint service and balancing
        
     
    
        
            Rear Axle:
        
        
            Salisbury or Jaguar independent rear suspension (IRS) unit service, bearings, and lubrication
        
     
    
        
            Steering:
        
        
            Burman & Sons steering box overhaul, linkage adjustment, and lubrication
        
     
    
        
            Front Suspension:
        
        
            Double wishbone independent front suspension service, kingpins, bushings, and shock absorbers
        
     
    
        
            Rear Suspension:
        
        
            Jaguar independent rear suspension (IRS) system service for XK140 and XK150 (leaf spring solid axle for XK120)
        
     
    
        
            Brakes:
        
        
            Girling hydraulic drum brakes service, wheel cylinder rebuild, brake shoe replacement, and fluid specifications
        
     
    
        
            Wheels Tyres:
        
        
            Wheel bearing service, tire pressure recommendations, and bolt patterns
        
     
    
        
            Body Exhaust System:
        
        
            Body panel alignment, door, hood, and trunk service, exhaust system maintenance
        
     
    
        
            Heating Windscreen:
        
        
            Heater matrix service, demisting system, and windscreen wiper mechanism
        
     
    
        
            Electrical:
        
        
            Lucas electrical system troubleshooting, wiring diagrams, dynamo charging, starter motor, ignition system, and lighting
        
     
    
    
        
            Routine Maintenance:
        
        
            Oil changes, lubrication points, filter replacements, ignition timing checks
        
     
    
        
            Engine Overhaul:
        
        
            Piston ring replacement, bearing inspection, valve grind, complete engine rebuild procedures
        
     
    
        
            Transmission Repair:
        
        
            Gearbox disassembly, inspection, and reassembly for both manual and overdrive units
        
     
    
        
            Suspension Steering Work:
        
        
            Bush replacement, kingpin service, steering box adjustment, alignment checks
        
     
    
        
            Brake System Overhaul:
        
        
            Drum removal, cylinder relining, fluid flushing, and bleeding procedures
        
     
    
        
            Electrical Troubleshooting:
        
        
            Diagnosing and repairing common electrical faults using wiring diagrams
        
     
    
        
            Bodywork Restoration:
        
        
            Panel alignment, hardware adjustment, and basic body repair guidance
        
     
    
    
        
            Depth Of Coverage:
        
        
            Comprehensive, from basic adjustments to full engine and gearbox rebuilds
        
     
 
    
    
    
        
            Engine Type:
        
        
            DOHC Inline 6-Cylinder 'XK' Engine
        
     
    
    
        
            Xk120 Engine Displacement:
        
        
            3442 cc (3.4 Litre)
        
     
    
        
            Xk120 Engine Horsepower:
        
        
            160 bhp @ 5000 rpm
        
     
    
        
            Xk120 Engine Torque:
        
        
            217 lb-ft @ 3000 rpm
        
     
    
        
            Xk140 Engine Displacement:
        
        
            3442 cc (3.4 Litre), option for 3.8 Litre on some variants
        
     
    
        
            Xk140 Engine Horsepower:
        
        
            175-190 bhp (depending on tune and variant)
        
     
    
        
            Xk150 Engine Displacement:
        
        
            3442 cc (3.4 Litre) or 3781 cc (3.8 Litre)
        
     
    
        
            Xk150 Engine Horsepower:
        
        
            190 bhp (3.4 Litre) to 250 bhp (3.8 Litre S-Type)
        
     
    
    
        
            Carburetors:
        
        
            Typically twin SU H, HD, or HV carburetors
        
     
    
        
            Fuel Type:
        
        
            Premium Unleaded Gasoline (historically leaded, compatible with modern fuels with additive)
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Typically every 3,000 miles or 6 months; check manual for specifics.
        
     
    
        
            Greasing Points:
        
        
            Regular lubrication of suspension and steering components is critical (e.g., every 1,000-2,000 miles).
        
     
    
        
            Valve Adjustment Interval:
        
        
            Recommended every 6,000-10,000 miles, depending on usage.
        
     
    
    
        
            Engine Oil Specification:
        
        
            SAE 20W-50 (modern equivalent) or straight 30W/40 for older engines. Historically Castrol XL 20W/30.
        
     
    
        
            Gearbox Oil:
        
        
            Gear oil to API GL-4 specification, e.g., Castrol EPX 80W-90 or equivalent.
        
     
    
        
            Rear Axle Oil:
        
        
            Hypoid gear oil, e.g., Castrol EPX 90.
        
     
    
        
            Brake Fluid:
        
        
            DOT 3 or DOT 4 hydraulic fluid (ensure seal compatibility, some prefer older DOT 3 or specific low-viscosity fluids for older systems).
        
     
    
    
        
            Common Problems:
        
        
            Oil leaks (from seals, gaskets, engine block), tappet noise, gearbox synchro wear (on later models), kingpin wear, brake system maintenance, electrical component failure (Lucas).
        
     
    
        
            Corrosion Prone Areas:
        
        
            Chassis outriggers, wheel arches, sills, and floor pans.
        
     
 
    
    
    
        
            Predecessor Models:
        
        
            Built upon the legacy of Jaguar's racing success and pre-war luxury vehicles.
        
     
    
    
        
            Xk120 Introduction:
        
        
            Unveiled in 1948 at the London Motor Show, initially as a limited-production sports car.
        
     
    
        
            Xk140 Enhancements:
        
        
            Introduced in 1954 with improved handling, interior space, and optional overdrive and wire wheels.
        
     
    
        
            Xk150 Redesign:
        
        
            Launched in 1957 with a more modern body styling, independent rear suspension (optional on early 150s), and the larger 3.8-liter engine option.
        
     
    
    
        
            Manufacturing Location:
        
        
            Coventry, England
        
     
    
        
            Total Production Numbers:
        
        
            Over 12,000 units combined across all XK models (exact breakdown varies)