Aston Martin DB Mark III: A Comprehensive Buyer's Guide
The Aston Martin DB Mark III, often shortened to DB Mk III, represents a pivotal point in Aston Martin's history. Produced between 1957 and 1959, it bridges the gap between the somewhat raw DB2/4 and the more refined, Italian-styled DB4. It's a classic grand tourer, designed for comfortable and stylish high-speed touring, capable of crossing continents with elegance and grace. Its combination of British engineering, sporting pedigree, and luxurious appointments make it a highly desirable classic car.
Generations
The DB Mk III wasn't produced in distinct "generations" in the modern sense, but there were notable revisions during its production run.
- DB Mark III (1957-1959):
- Key Changes from DB2/4 Mk II: Improved engine (DBA series), distinctive grille (inspired by the DBR1 racer), improved Girling front disc brakes (initially optional, later standard), redesigned instrument panel, and subtle styling refinements. Overdrive became standard equipment.
- Early Production (approx. first 100 cars): Used a slightly different DBA engine with lower compression. These also may have different trim details.
- Late Production (approx. last 100 cars): Offered with the optional Special Series (DBS) engine, boasting even more power. Minor trim and detail variations also occurred throughout the production run.
Reliability & Common Issues
Owning a classic like the DB Mk III requires a realistic understanding of its potential maintenance needs. While generally robust for its age, certain areas require careful attention:
Engine (DBA Series):
- Valve Gear: The twin overhead camshaft engine is generally reliable, but camshaft wear can occur if oil changes are neglected. Tappet adjustment is crucial for smooth running and preventing excessive wear. Check for excessive valve noise, which may indicate wear.
- Cooling System: Overheating can be a problem, especially in warmer climates. Ensure the radiator is clean and free of blockages, the water pump is functioning correctly, and the thermostat is operating as it should. Original radiators are often past their prime and may benefit from re-coring or replacement.
- Lubrication: Oil leaks are common in older engines. Check for leaks around the crankshaft seals, valve covers, and oil pan. Maintaining proper oil pressure is vital.
- Carburetors: The DB Mk III typically used SU carburetors. These require regular tuning and maintenance to ensure proper fuel delivery and avoid running rich or lean. Uneven running or difficulty starting may indicate carburetor issues.
Transmission:
- David Brown Gearbox: These gearboxes are generally strong, but wear can occur in the synchromesh, leading to difficulty shifting. Listen for excessive noise and check for smooth engagement of all gears. Overdrive units (Laycock de Normanville) are prone to wear and require regular maintenance.
Chassis & Suspension:
- Chassis Rust: Corrosion is a major concern. Carefully inspect the chassis, particularly around the sills, floor pans, and suspension mounting points. Repairs can be costly.
- Suspension Components: Check for wear in the suspension bushings, ball joints, and shock absorbers. Original lever-arm shock absorbers can be rebuilt but modern telescopic conversions are a common upgrade.
- Brakes: While the Girling front disc brakes were a significant improvement, they are still relatively primitive compared to modern brakes. Ensure they are in good working order, with adequate pad thickness and properly functioning calipers. The rear drum brakes also require attention.
Electrical System:
- Wiring: Original wiring harnesses are often brittle and prone to corrosion. Ensure the wiring is in good condition and that all electrical components are functioning correctly. Consider a modern wiring harness upgrade for improved reliability.
- Lucas Components: While iconic, Lucas electrical components are often blamed for unreliability. Regularly inspect and maintain components like the starter motor, generator (or alternator), and distributor.
Bodywork:
- Aluminum Body: The aluminum body panels are susceptible to corrosion, especially where they meet the steel frame. Look for signs of bubbling paint or corrosion around panel edges. Accident damage can also be difficult and expensive to repair properly.
- Panel Fit: Panel gaps should be consistent. Poor panel fit may indicate previous accident damage or poorly executed repairs.
Driving Experience
Driving a DB Mk III is an experience steeped in history and character. It's not a modern sports car, but a classic grand tourer with its own unique charm.
Pros:
- Engine Note: The DBA engine produces a distinctive and pleasing exhaust note.
- Handling: The car handles well for its age, with responsive steering and a relatively balanced chassis.
- Comfort: The DB Mk III offers a comfortable ride, even over long distances.
- Style: The car's elegant and timeless design is a major draw.
- Overdrive: The standard overdrive enhances the cruising experience, reducing engine revs at highway speeds.
Cons:
- Performance: While adequate, the performance is not blistering by modern standards.
- Braking: The brakes require more effort and are less effective than modern brakes.
- Maintenance: Owning a classic car requires a commitment to regular maintenance and potential repairs.
- Fuel Economy: Fuel economy is poor compared to modern cars.
- Heat: Engine heat can be an issue, especially in warmer climates.
Buying Advice
Purchasing a DB Mk III is a significant investment. Here's some advice to help you make an informed decision:
Years to Look For:
- Late Production Cars (Last 100): These are often considered the most desirable due to the availability of the optional DBS engine, offering increased performance. However, they command a premium.
- Cars with Provenance: Well-documented history, including service records and ownership history, is always a plus.
What to Avoid:
- Cars with Significant Rust: Extensive rust repair can be very costly. Avoid cars with significant corrosion on the chassis or body.
- Poorly Executed Restorations: Inspect the quality of any previous restoration work carefully. Poorly done repairs can be difficult and expensive to rectify.
- Cars with Major Mechanical Issues: Engine or gearbox rebuilds can be expensive. Thoroughly inspect these components or have them inspected by a specialist.
- Cars Without Documentation: Avoid cars with little or no history. Knowing the car's past helps assess its condition and originality.
Pre-Purchase Inspection:
Crucially, have any potential purchase inspected by a specialist familiar with Aston Martin DB models. They can identify potential problems that may not be obvious to the untrained eye.
Key areas to inspect:
- Chassis and Body: Look for rust, accident damage, and panel fit issues.
- Engine: Check for oil leaks, excessive noise, and proper compression.
- Transmission: Test the shifting and listen for any unusual noises.
- Suspension: Inspect the suspension components for wear.
- Brakes: Ensure the brakes are in good working order.
- Electrics: Check all electrical components for proper function.
Owning an Aston Martin DB Mark III is a rewarding experience. With careful research, a thorough inspection, and a commitment to maintenance, you can enjoy this iconic grand tourer for many years to come.
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