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Bmw Bmw E24 6 Series

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The BMW E24 6 Series: A Grand Tourer Legend

The BMW E24 6 Series, produced from 1976 to 1989, represents a pinnacle of BMW's grand touring philosophy. Designed as a successor to the E9 coupes (2800CS and 3.0CS), the E24 offered a blend of performance, luxury, and elegant styling that cemented its place as a classic. It's a front-engine, rear-wheel-drive coupe designed for comfortable long-distance cruising with spirited driving capabilities.

Generations and Model Evolution

  • First Generation (1976-1982): The "Sharknose" Origins
    • 1976: Introduction of the 630CS and 633CSi. The 630CS used a carbureted M30 engine, while the 633CSi featured Bosch L-Jetronic fuel injection. Notable features included the "sharknose" front end, independent suspension, and elegant interior.
    • 1978: Introduction of the 635CSi. This model featured a higher-performance M90 engine (later updated to the M30) and close-ratio gearing for a more sporting feel. It also debuted the front air dam and rear spoiler, visually setting it apart.
  • Second Generation (1982-1989): Refinement and Performance
    • 1982: Major facelift and mechanical updates. The high-mounted bumpers were introduced to meet US regulations (though these are sometimes retrofitted with Euro bumpers). The interior received upgrades, and the M30 engine continued to be refined.
    • 1984: Introduction of the M635CSi/M6. Powered by the M88/3 engine (or S38 in North America), a high-revving inline-six derived from the M1 supercar, this model represented the performance flagship of the E24 range. Cosmetic changes included subtle body modifications and unique badging.
    • 1988-1989: Minor refinements and limited production towards the end of the model run. Catalytic converters became more common.

Reliability and Common Issues

While the E24 is a beautifully engineered car, its age means careful inspection is crucial. Here's a breakdown of potential issues:

Engine (M30 & M88/S38)

  • M30: Generally robust but prone to oil leaks (valve cover, oil pan, rear main seal). Timing chain wear can occur in neglected examples. Cooling system issues (radiator, hoses, thermostat) are common due to age. Check for signs of head gasket failure.
  • M88/S38: More complex and expensive to maintain. Valve adjustments are critical and must be done regularly. Throttle position sensor (TPS) issues can cause erratic idle. The timing chain system is more intricate than the M30 and requires specialist attention. Oil spray bar clogging on the S38 can lead to camshaft wear.

Transmission

  • Manual: Getrag gearboxes are generally reliable, but synchro wear can occur, especially in second gear. Clutch condition is important to assess.
  • Automatic: ZF transmissions are durable, but fluid changes are essential. Check for smooth shifting and any signs of slippage.

Suspension and Brakes

  • Worn suspension bushings are common, leading to vague handling. Inspect shocks, struts, and sway bar links. Rear subframe bushings can also degrade.
  • Brake components (calipers, rotors, hoses) should be inspected for wear and leaks. ABS systems, if equipped, can be prone to failure.

Electrical System

  • Wiring harnesses can become brittle and crack, leading to electrical gremlins.
  • Check the functionality of all electrical components, including the sunroof, power windows, and central locking.
  • Early models with L-Jetronic fuel injection can suffer from issues with the air flow meter (AFM) and other sensors.
  • SI (Service Interval) lights are notoriously unreliable and often need resetting or bypassing.

Body and Interior

  • Rust: A major concern. Check thoroughly around the wheel arches, rocker panels, floor pans, and trunk area. Pay particular attention to areas where body panels join.
  • Trim: Exterior trim parts can be difficult and expensive to source. Check for missing or damaged pieces.
  • Interior: Leather upholstery can crack and wear. Check the condition of the dashboard, seats, and door panels. Sunroof mechanisms can seize. Odometer gears often fail.

Driving Experience

The E24 6 Series offers a unique blend of classic BMW traits. It's a comfortable and capable grand tourer with a sporting edge. The handling is well-balanced, and the steering (especially on early models) provides excellent feedback. The M30 engine provides ample torque for relaxed cruising, while the M88/S38 delivers exhilarating performance with a distinctive engine note. Wind noise can be noticeable at higher speeds. The large glass area provides excellent visibility.

  • Pros:
    • Elegant styling.
    • Comfortable ride.
    • Well-balanced handling.
    • Strong engines (especially M88/S38).
    • Classic BMW feel.
  • Cons:
    • Potential for rust.
    • Aging electrical systems.
    • Parts can be expensive and difficult to find.
    • Maintenance can be demanding.
    • Fuel economy can be poor.

Buying Advice

Purchasing an E24 6 Series requires careful research and a thorough inspection. Here's some advice:

Years to Look For

  • Post-1982 Models: Generally benefit from updates and improvements. The later the model year, the more refined it will be.
  • M6/M635CSi: Highly desirable but command a premium price. Ensure the car has been well-maintained, as these models require specialist care.
  • Euro-Spec Cars: Often offer higher performance due to the lack of emissions restrictions. However, importing and maintaining these cars can be more complex.

Years to Avoid

  • Early Carbureted 630CS: While historically significant, these models are less desirable due to their lower performance and more complex carburetor systems.
  • Cars with Extensive Rust: Unless you're prepared for a major restoration, avoid cars with significant rust damage.
  • Cars with Poor Maintenance History: Look for cars with documented service records and evidence of regular maintenance.

Key Things to Check

  • Rust: As mentioned above, check thoroughly for rust in all the common areas.
  • Engine Condition: Listen for any unusual noises, check for leaks, and ensure the engine runs smoothly. Perform a compression test if possible.
  • Transmission Operation: Test the gear changes (both manual and automatic) to ensure they are smooth and precise.
  • Electrical System: Check the functionality of all electrical components.
  • Suspension and Brakes: Inspect the suspension and brakes for wear and damage.
  • Service History: Review the service history carefully to assess the car's maintenance record.
  • VIN Verification: Verify the VIN to ensure the car is what it claims to be.

In conclusion, the BMW E24 6 Series is a rewarding classic to own, offering a unique blend of style, performance, and driving pleasure. However, prospective buyers should be prepared for the challenges of owning a classic car and should prioritize a thorough inspection and a well-documented maintenance history.

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