Maintenance

Classca Maintenance Standards

Every Mini we export is prepared to standards proven in Japan's hot, humid summers,
so it arrives ready for your roads, wherever you are.

Maintenance in progress
What Matters to Classca

A Car Passed Down
Through Generations

At Classca, we believe the classic Mini deserves to be passed
from owner to owner, and from generation to generation,
in Japan and around the world.

Wherever your Mini's next chapter begins,
we want it to be one you can enjoy with complete peace of mind.
That is why we give every car our full attention
and finish it with uncompromising care.

A Mini on a city streetHands on the steering wheel
For a Mini You Can Love for Years

Three Characteristics of the Classic Mini

Because of its unique construction and the effects of age, the classic Mini behaves differently from modern cars. Cooling performance, oil seals and age-related wear in particular all require careful maintenance.

Before any Mini leaves Japan, we assess its condition through an inspection of more than 150 points, then carry out the maintenance and countermeasures that individual car needs.

Front view of a classic Mini

01Limited Cooling Capacity

By design, the classic Mini has little cooling capacity to spare. Japan's hot, humid summers and stop-and-go city traffic are among the toughest conditions it can face.
We upgrade the cooling system with Japan-made components proven in exactly those conditions, so your Mini is ready for hot summers wherever you drive.

> See how we upgrade the cooling system

02Prone to Oil Leaks

The original gaskets and seals are made from materials that deteriorate easily, so oil leaks tend to develop in various places.
At Classca, we replace them with reliable Japan-made rubber parts and improved components, and tailor the work to each car's condition to keep seepage and leaks to a minimum.

> See how we prevent oil leaks

03Age-Related Wear

Even the final models are more than 25 years old. Worn rubber, bushes and heavily loaded components can make the controls feel inconsistent and reduce stability on the road.
At Classca, we inspect every area and replace or adjust parts as needed, restoring the Mini's original feel and making it safe to drive.

> See how we address age-related wear
Why Japan-Made Parts

Japan-Quality, Down to Every Part

In Japan, specialist makers and enthusiasts are still developing improved parts for the classic Mini today. We carefully select proven components from respected Japanese manufacturers and fit them as standard, so the quality of every Mini goes deeper than its appearance.

  • Cooling System

    JMSA × GMB water pump / Japan-made hoses & thermostat

    A water pump developed by the Japan Mini Sports Association with a cast-iron impeller, plus Japan-made hoses and a carefully selected 88°C thermostat, keep temperatures stable on hot days and in heavy traffic.

  • Belts & Heater Valve

    Bando / Mitsuboshi Belting / Genuine Toyota

    Accessory belts from leading Japanese belt makers Bando and Mitsuboshi, and a genuine Toyota heater valve, a proven upgrade that operates smoothly and lasts.

  • Gearbox

    Univance baulk rings

    High-precision baulk rings from Japanese gear manufacturer Univance, with contact accuracy optimized to 1/100 mm for smooth, consistent shifting.

  • Exhaust

    HKS × JMSA downpipe

    A downpipe jointly developed by HKS and JMSA in SUS409 heat-resistant stainless steel, 55% lighter than the original part.

Cooling System Upgrades
Engine bay

Proven in Japan's Summers:
Cooling System Upgrades

We overhaul the entire cooling system, from the 3-core radiator and precision cap to Japan-made hoses, the water pump and the electric fan, upgrading it to cope with modern driving conditions.
Developed and proven in Japan's hot, humid summers and dense city traffic, this setup keeps your Mini running at a stable temperature on long highway drives and in heavy traffic, wherever you live.

Japan-Made & Upgraded Parts

3-Core Radiator
A high-quality radiator whose 3-core construction delivers excellent heat dissipation. An optimized core layout provides both stable cooling performance and durability.
Precision Radiator Cap
A precision radiator cap developed specifically for the Mini. Made with dedicated tooling and proven through durability testing for reliable sealing.
Upper Radiator Hose
A high-quality Japan-made upper hose. Excellent heat and pressure resistance supports stable cooling and long-term reliability.
Lower Radiator Hose
A high-quality Japan-made lower hose with excellent heat and pressure resistance for dependable cooling performance.
Conversion Hose
A high-quality Japan-made conversion hose. Its heat and pressure resistance creates a stable cooling circuit with a precise fit.
Heater Hose
A finely finished Japan-made heater hose. Its heat and pressure resistance and high durability are suitable even for motorsport use.
Heater Core
A brass heater core made by a Japanese radiator manufacturer. Its jointless construction resists leaks and can be repaired if needed.
Heater Valve
A genuine Toyota heater valve for 12 mm hoses. Its lever operates extremely smoothly and it is highly durable, making it a well-proven replacement for Rover Minis and other classic cars.
Water Pump
A high-quality water pump developed by JMSA (Japan Mini Sports Association) and manufactured by GMB. Its cast-iron impeller suppresses cavitation for stable cooling and long life.
Fan Blade
A genuine fan blade stamped with the MOWOG mark. Its rigid design resists deformation, delivering steady airflow and long-term durability.
Ribbed Belt
A high-quality ribbed belt made by Japanese manufacturer Bando.
V-Belt AB
A high-quality belt made by Japanese manufacturer Mitsuboshi Belting.
Joint Pipe
A stainless steel joint pipe. Rust-resistant and highly durable, its OE shape ensures a precise fit and dependable long-term use.
Hose Clamp (Large)
A hose clamp from long-established German manufacturer WÜRTH. It applies even clamping force without damaging the hose.
Hose Clamp (Small)
A hose clamp from long-established German manufacturer WÜRTH. It applies even clamping force without damaging the hose.
Thermostat
A tested and carefully selected Japan-made thermostat (88°C). Its precise, reliable operation supports proper coolant temperature control.
Thermostat Gasket
A high-quality thermostat gasket set that ensures a stable seal and improves the reliability of the cooling system.
Upper Radiator Bush
Absorbs vibration with the right amount of elasticity, keeping the radiator securely mounted and improving durability.
Upper Radiator Bush Collar
A bush collar for the upper radiator bracket. Its precise finish ensures accurate positioning and secure mounting for stability and durability.
Coolant (LLC)
Long-life coolant with anti-rust and anti-foaming properties that keeps the engine at its optimum temperature.
Thermal Transmitter SPi
A high-precision thermal transmitter for SPi models. It accurately detects coolant temperature, helping monitor engine condition and maintain stable control.
Electric Fan
An electric fan for fuel-injected models. Its high-power motor boosts cooling performance and keeps coolant temperature in the ideal range so the engine performs consistently.
  • 3-Core Radiator—Cools the engine by dissipating heat from the coolant
  • Radiator Cap—Regulates the pressure of the cooling system
  • Upper Radiator Hose—Upper coolant hose
  • Lower Radiator Hose—Lower coolant hose
  • Conversion Hose (not fitted to Mini 1000)—Adapter hose for different model years
  • Heater Hose—Carries hot coolant to the heater
  • Heater Core—Heat exchanger for cabin heating
  • Heater Valve—Controls the flow of hot coolant to the heater
  • Water Pump—Circulates coolant through the engine
  • Fan Blade—Draws cooling air through the radiator
  • Ribbed Belt (not fitted to Mini 1000)—Drives the engine accessories
  • V-Belt AB—V-belt that drives the engine accessories
  • Stainless Steel Joint Pipe—Connects the coolant passages
  • Hose Clamp (Large)—Large-diameter clamp that secures the hoses
  • Hose Clamp (Small)—Small-diameter clamp that secures the hoses
  • Thermostat—Controls coolant flow, fitted with its gasket
  • Thermostat Gasket—Seals the thermostat housing
  • Upper Radiator Bush—Rubber bush that secures the radiator
  • Upper Radiator Bush Collar—Spacer used with the radiator mounting bush
  • Coolant (LLC)—Long-life antifreeze for engine cooling
  • Thermal Transmitter SPi (not fitted to Mini 1000)—Sensor that detects coolant temperature
  • Electric Fan (not fitted to Mini 1000)—Electrically driven cooling fan
  • Heater Cable—Transmits the heater control input
  • A/C Compressor—Compresses refrigerant for the air conditioning
  • Stone Guard—Protects the radiator from flying stones
  • Thermostatic Sandwich Plate—Mounting plate for oil temperature control
Oil Leak Prevention
Engine

Addressing Structural Weak Points:
Seal & Gasket Refresh

We refresh the timing cover and rocker cover gaskets, valve stem seals and more with high-quality parts, improving sealing and durability.
By tailoring the work to each car's specification and condition, we finish every Mini with seepage and leaks kept to a minimum.

Japan-Made & Upgraded Parts

Timing Cover Gasket
A timing cover gasket with excellent durability and sealing.
Rocker Cover Gasket
A rocker cover gasket made from Japanese cork. Its excellent sealing prevents leaks and seepage and maintains stable performance over the long term.
Valve Stem Seals
Valve stem seals made from highly durable material. Their optimized clamping design prevents oil from leaking past the valves while combining stable sealing with long life.
Filter Housing (AT)
A reinforced filter housing. Thick steel construction resists deformation and copes with high oil pressure, reducing the risk of oil leaks.
Stem Seals
A key component that controls oil at the valve stems. Optimized clamping pressure strikes a fine balance between sealing, smooth sliding and durability.
  • Differential Side Oil Seal—Prevents oil leaks at the differential
  • Striking Rod Oil Seal—Prevents oil leaks from the gear selector linkage
  • Speedometer Cable Oil Seal—Prevents oil leaks at the speedometer cable
  • Speedometer Cable Housing Gasket—Keeps the speedometer cable joint sealed and prevents oil leaks
  • Timing Chain Case Gasket—Prevents oil leaks at the front of the engine
  • Timing Chain Case Oil Seal—Prevents oil leaks at the front of the engine
  • Rocker Cover Gasket & Seal Set—Complete seal set that prevents oil leaks at the top of the engine
  • Kickdown Lever (AT)—Triggers automatic downshifts in response to throttle input
  • Valve Stem Seals—Prevent oil from leaking past the valves
  • Tappet Chest Cover Gasket—Prevents oil leaks on the side of the engine
  • Primary Gear Oil Seal—Prevents oil leaks at the primary gear
  • Filter Housing—Holds and protects the oil filter so it works correctly
Addressing Age-Related Wear
Suspension
Suspension

Restoring the Original Ride:
Suspension Refresh

We refresh the rubber cones, bushes and radius arm components with high-quality parts, optimizing spring characteristics and precise suspension movement.
Rather than simply replacing parts, we balance the whole system to bring back the supple, stable ride the Mini was designed to deliver.

Japan-Made & Upgraded Parts

Rubber Cones
Based on the Moulton × AVON joint development and refined through long-term testing and specification improvements. Optimized spring rate and resilience deliver an excellent ride and high durability.
Radius Arms
OE-shaped radius arms with stainless steel metal sleeves. High durability resists deformation and supports a stable suspension.
Radius Arm Bushes & Bearings
A premium bush and bearing set. Tight fit and consistent material deliver precise movement and bring out the full performance of the suspension.
Lower Arm Bushes
Highly durable lower arm bushes. The right flexibility and precise design allow smooth suspension movement, improving stability and durability.
Tension Rod Bushes
Highly durable tension rod bushes. Appropriate flexibility and optimized hardness improve suspension stability and durability.
Knuckle Joint Dust Boots
An essential part that protects the joints. Made in Japan from oil-resistant material for improved durability and sealing.
Hi-Lo Kit
A Hi-Lo kit made by Mini Sport (UK). Produced by high-pressure die casting for outstanding strength, it lets the rubber cones work as intended while adjusting ride height.
  • Lower Arm Bushes—Rubber bushes at the suspension pivot points
  • Tension Rod Bushes—Rubber bushes for the rod that controls fore-aft movement
  • Front Hub Bearings—Allow the front wheels to rotate smoothly
  • Front Oil Seals (Outer/Inner)—Grease and seals that keep the bearings lubricated and sealed
  • Rear Hub Bearings—Allow the rear wheels to rotate smoothly
  • Rear Oil Seals—Grease and seals that keep the rear bearings lubricated and sealed
  • Suspension Joints—Pivot joints of the suspension
  • Upper Arm Assembly—Complete upper suspension arm
  • Radius Arm Oil Seal—Prevents oil leaks at the radius arm
  • Radius Arm Overhaul—Full set of consumable parts inside the rear radius arm
  • Radius Arm Bushes & Bearings—Support the pivoting movement of the rear radius arm
  • Radius Arm Bracket—Mounting bracket for the radius arm
  • Rubber Cones—Rubber springs of the suspension
  • Springs—Support the weight of the body
  • Hi-Lo Kit—Ride height adjuster for the suspension
  • Hi-Lo Joint Kit—Linkage parts for the ride height adjuster
  • Knuckle Nylon Caps—Protective caps for the suspension knuckles
  • Knuckle Joint Dust Boots—Rubber covers that protect the knuckle joints
  • Rebound Rubbers—Absorb the shock of suspension rebound
  • Front Shock Absorbers—Dampen vibration at the front
  • Rear Shock Absorbers—Dampen vibration at the rear
Steering wheel
Steering

Bringing Out the Mini's Signature Feel:
Steering Refresh

We refresh the rack ends, boots and rack bushes with high-quality parts, optimizing clearances and movement throughout the system.
By restoring steering response and stability, we bring back the direct, engaging handling that makes a Mini so enjoyable to drive.

Japan-Made & Upgraded Parts

Rack Ends
High-quality rack ends from a Japanese manufacturer. Their precise design delivers a confident steering feel and stable steering performance.
Rack Boots
Rack boots made from Japanese rubber. Their excellent durability protects the steering mechanism and maintains stable performance.
Rack Bushes
Nylon bushes that eliminate play in the steering rack. High quality for a stable, precise steering feel.
  • Tie Rod Ends—Transmit steering input to the wheels
  • Rack Ends—Connect the steering rack to the wheels
  • Rack Boots—Rubber covers that protect the steering rack
  • Rack Bushes—Rubber mounts that secure the steering rack
Brake pedal
Brakes & Clutch

Confident Control Every Time:
Brake & Clutch Refresh

We refresh the wheel cylinders and clutch components with high-quality parts, optimizing hydraulic transmission and control.
By fine-tuning brake and clutch operation, we prepare each Mini to be handled with confidence, from everyday driving to long-distance trips.

Japan-Made & Upgraded Parts

Wheel Cylinders
We overhaul the wheel cylinders using high-quality Japan-made cup kits. Their excellent seal prevents fluid seepage and improves durability.
Clutch Master Cylinder Inner Kit
An inner kit for overhauling the clutch master cylinder. High-quality seals maintain stable hydraulic pressure for smooth clutch operation.
Clutch Slave Cylinder
A clutch slave cylinder whose high-quality internals provide stable hydraulic transmission and smooth clutch operation.
  • Clutch Master Cylinder—Generates hydraulic pressure for the clutch
  • Clutch Master Cylinder Inner Kit—Consumable internal parts of the clutch master cylinder
  • Clutch Metal Pipe—Metal pipe that carries clutch hydraulic pressure
  • Master Cylinder Base Gasket—Seals the master cylinder mounting
  • Clevis Pin & Snap Pin (S)—Pins that secure the clutch components
  • Hose & Gasket—Hydraulic hose and sealing gasket
  • Lock Nut—Nut that prevents loosening
  • Lock Washer—Washer that prevents loosening
  • Clutch Slave Cylinder—Hydraulic unit that disengages the clutch
  • Clutch Slave Cylinder Inner Kit—Consumable internal parts of the slave cylinder
  • Clutch Fluid—Hydraulic fluid for the clutch
  • Clutch Overhaul—Full set of clutch consumables
  • Clutch Plunger—Push component that operates the clutch
  • Clutch Release Lever—Transmits clutch pedal input
  • Pushrod—Rod that transmits clutch movement
  • Clevis Pin (L)—Long pin that secures the clutch components
  • Clevis Pin (M)—Medium pin that secures the clutch components
  • Oil Stopper Ring Set—Rings that keep oil from escaping
  • Thrust Washers—Bearing parts that take axial loads
  • Wheel Cylinders—Hydraulic cylinders that operate the drum brakes
  • Brake Master Cylinder—Generates hydraulic pressure for the brakes
  • Brake Servo—Assists the driver's pedal effort
  • Pressure Regulating Valve—Balances front and rear brake pressure
  • Front Brake Hoses & Gaskets—Front brake hoses and sealing gaskets
  • Rear Brake Hoses—Rear brake hoses
  • Caliper Seals—Full set of internal caliper seals
  • Caliper Split Seals—Seals at the caliper split line
  • Stainless Steel Pistons—Stainless steel pistons inside the calipers
  • Brake Pads—Clamp the disc to slow the car
  • Brake Discs—Discs that slow wheel rotation when braking
  • Retaining Pins—Hold the brake pads in place
  • Brake Shoe Assembly (Ferodo)—Shoes that expand inside the drum to slow the car
  • Brake Drums—Rotating part of the drum brakes
  • Back Plate Grommets—Rubber parts that seal and protect the brake assembly
  • Side Ring Boots—Rubber boots that protect moving parts
  • Return Springs—Retract the brake shoes
  • Brake Fluid—Hydraulic fluid for the brakes
Other Items

Beyond cooling, oil leak prevention and age-related wear, we carry out a comprehensive inspection and tailor the maintenance to each individual Mini.

Japan-Made & Upgraded Parts

CV Joint Boot (Outer)
Japan-made outer driveshaft boots offering high durability and a long service life.
Exhaust Downpipe
A downpipe jointly developed by HKS and JMSA. Made from SUS409 heat-resistant stainless steel, it is 55% lighter than the original part.
High-Tension Leads
High-performance ignition leads with a silicone jacket and metallic spiral core. OE-sized yet delivering a high-voltage, stable spark, they suit everything from carburetor to fuel-injected models.
Upper Steady Bush
A press-fit steady rod bush made by DARSON INDUSTRIES. Its center outer diameter is 1 mm larger, so it fits the steady rod securely.
Relay Box Strap
A strap that firmly secures the multi-relay in the engine bay.
Baulk Rings
High-precision baulk rings from Japanese gear manufacturer Univance. Contact accuracy optimized to 1/100 mm prevents galling and locking for smooth, consistent shifting.
  • CV Joint Boot (Outer)—Rubber cover that protects the wheel-side joint
  • CV Joint Boot (Inner)—Rubber cover that protects the inner joint
  • Outer CV Joint Component—Component part of the outer CV joint
  • CV Joint Assembly (Outer)—Complete outer drive joint
  • CV Joint Assembly (Inner)—Complete inner drive joint
  • Driveshaft (RH)—Delivers drive to the right-hand wheel
  • Driveshaft (LH)—Delivers drive to the left-hand wheel
  • Dust Boots—Protective dust covers
  • Front Subframe Mounts—Rubber mounts that secure the front subframe
  • Subframe Shims—Spacers that adjust the subframe position
  • Rear Subframe Mounts—Rubber mounts that secure the rear subframe
  • Engine Mount AT (LH)—Left-hand engine mount for automatic models
  • Engine Mount AT (RH)—Right-hand engine mount for automatic models
  • Engine Mount MT—Engine mount for manual models
  • Lower Steady Bush—Rubber bush that limits engine movement
  • Gear Lever Metal Bush—Reduces play in the gear lever
  • Tower Mount (Round)—Round mount that supports the top of the suspension
  • Tower Mount (Diamond)—Diamond-shaped mount that supports the top of the suspension
  • Exhaust Downpipe—Routes exhaust gas down from the engine
  • Exhaust Downpipe Clamp—Secures the exhaust pipe joint
  • Catalytic Converter Gasket—Seals the catalytic converter joint
  • Catalytic Converter—Cleans the exhaust gas
  • Muffler—Reduces exhaust noise
  • Muffler Mount—Rubber mount that supports the muffler
  • Manifold Gasket—Seals the joint between the engine and the exhaust
  • Exhaust Branch Manifold—Collects exhaust gas from the engine
  • Flexible Exhaust Pipe—Flexible pipe that absorbs vibration
  • Exhaust Joint Pipe—Intermediate pipe that connects exhaust sections
  • Middle Hanger Bracket—Stay that supports the front exhaust
  • Rear Hanger Bracket—Stay that supports the rear exhaust
  • Front Muffler Mount (Square)—Square rubber mount for the front muffler
  • Rear Muffler Mount (Round)—Round rubber mount for the rear muffler
  • Differential Side Stay—Stay that supports the exhaust
  • Downpipe Flange Fitting—Secures the exhaust downpipe flange
  • Gear Change Box Mount—Supports the gear change mechanism
  • Muffler Hanger—Suspends and supports the muffler
  • Rear Muffler Hanger—Suspends and supports the rear muffler
  • Genuine Air Cleaner—Filters the intake air
  • Vacuum Joint—Connector for the vacuum hoses
  • Spark Plugs—Create the spark for combustion
  • High-Tension Leads—Carry ignition current to the spark plugs
  • Distributor Cap & Rotor—Distribute ignition current to each cylinder
  • Timing Chain Tensioner Pads—Keep the timing chain running steadily
  • Vacuum Pipe—Carries engine vacuum
  • Fuel Trap—Handles fuel impurities and vapor
  • Distributor Signal Wire—Carries the engine speed signal
  • Ignition Coil—Generates the ignition voltage
  • Valve Clearance—Adjusting the valve clearances to specification
  • Upper Steady Bush—Rubber bush that limits movement at the top of the engine
  • Torque Rod Stay—Stay that restrains engine movement
  • Tappet Chest Cover Bush—Reduces play at the tappet chest cover for stable operation
  • Distributor Assembly—Complete ignition distributor
  • Relay Box Strap—Secures the relay box
  • Fuse Box—Houses the fuses that protect the electrical circuits
  • Under Guard—Protects the underside of the engine
  • Fuel Strainer—Filters debris from the fuel
  • Fuel Pump SPi—Delivers fuel to the engine
  • Fuel Sender Unit—Measures the fuel level
  • Throttle Potentiometer—Detects the throttle opening
  • Lambda (O2) Sensor—Measures oxygen content in the exhaust
  • Stepper Motor—Controls the idle air volume
  • ECU—Computer that controls the engine
  • Relay Module—Relay unit that controls the electrical system
  • Carburetor Overhaul—Full set of internal carburetor consumables
  • Fuel Hose—Rubber hose that carries fuel
  • Fuel Pipe—Metal pipe that carries fuel
  • Hose Clamps—Metal clamps that secure the hoses
  • Carbon Blasting—Removing carbon deposits from inside the engine
  • Parts Cleaner—Removes oil and grime from components
  • Throttle Cable SPi—Transmits accelerator pedal input
  • Choke Cable—Operates the cold-start mechanism
  • Carburetor Fuel Strainer—Fuel filter for carburetor models
  • Carburetor Fuel Pump—Fuel pump for carburetor models
  • Needle Jet—Meters the amount of fuel
  • Engine—Disassembling and rebuilding the engine internals to restore performance
  • Transmission—Disassembling and rebuilding the manual transmission internals
  • Clutch—Disassembling and renewing the clutch assembly to restore its operation
  • Tires—Provide grip and largely determine safety and ride comfort
  • Wheel Nuts—Securely fasten the wheels to the car
  • Engine Oil 15W-50—Lubricates the engine internals
  • Drain Plug Washer—Seals the drain plug at each oil change
  • Oil Filter—Filters impurities from the engine oil
  • Oil Filter & O-Ring—Oil filter and sealing O-ring for automatic models
  • Brake & Clutch Fluid—Hydraulic fluid for the brakes and clutch
  • Battery—Powers the electrical system
  • Spare Tire—Spare wheel for emergencies
  • Coolant (LLC)—Long-life antifreeze for engine cooling
  • A/C Refrigerant—Refrigerant gas for the air conditioning
  • R134a Compressor Oil—Lubricating oil for the A/C compressor
Buying from Overseas

From Our Workshop to Your Door

Buying a classic Mini from Japan is simpler than you might think. We handle the maintenance, shipping and export paperwork, and keep you updated at every step.

  1. STEP 01

    Online Consultation

    We share detailed photos and videos of the car, and can show it to you live over Zoom along with a tour of our workshop.

  2. STEP 02

    Quotation & Contract

    You receive a clear quotation including ocean freight and marine insurance (CIF). Payment is made by international bank transfer.

  3. STEP 03

    Maintenance in Japan

    After a 150+ point inspection and test drive, we carry out maintenance to the standards on this page. This typically takes 2–3 months.

  4. STEP 04

    Shipping & Documents

    We ship to your designated port by container or RORO vessel and prepare the B/L, invoice, packing list and export certificate.