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Keeping your car for longer? 14 parts most likely to fail, and how to prevent it

1 September 2020 11:10 AM

These are the warning signs to look out for, so you can keep your car in tiptop shape for longer.

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Nine out of 10 motorists in South Africa intend to keep their cars for longer, according to research conducted by the Automobile Association (AA).

The AA found that about four out of 10 South Africans intend to drive their cars for between five and 10 years.

It may be a good financial move to keep your vehicle for longer to save on repayments, but the older the vehicle, the higher the risk of a mechanical breakdown – often with parts that are expensive to repair. Proper, proactive maintenance is key to protect you against a mechanical breakdown, massive expenses, an accident or worse.

Ricardo Coetzee, Head - Auto & General

These are the parts, according to Auto & General, that you should frequently inspect and maintain as they are most likely to fail on older cars:

  • Timing belts: The belt’s teeth can sheer off or it can snap in two or more pieces, leading to catastrophic engine failure and costly full engine rebuild. Warning signs: The loss of power or a loud rattling/knocking noise.

  • Braking system: Brake pads can wear down completely, damaging brake discs and leading to complete loss of braking power. Warning signs: Grinding noise of metal to metal, preceded by an apparent loss of brake fluid due to a drop in the brake fluid level - a clear indication that the brakes are worn down. Brake hoses or brake system seals: Leaking or ruptured hoses and seals can lead to brake system failure. Generally intended for a five-year service life. Warning signs: Deterioration can lead to blockages and/or leakages at joints as well as either a spongy or hard pedal feel with limited stopping effect. Brake fluid: Absorbs moisture during use, which reduces the resistance to heat during braking and can lead to brake failure. The brake system can also deteriorate internally, requiring costly refurbishment. Brake fluid is considered old at the two-year mark. Warning signs: Brake fade (the vehicle takes longer to stop). Spongy pedal feel, or hard pedal feel. The brake fluid in the reservoir appears dirty.

  • Radiators and radiator hoses: Numerous heating and cooling cycles could see the radiator and hoses deteriorate and fail. Resultant overheating could lead to engine failure. Warning signs: The temperature gauge is in the red. Hissing sound from the radiator cap. Hoses can display signs of bulging or collapse. A loss of power may also be experienced.

  • Alternators: Failure means that the battery and the electrical system won’t be kept at the necessary charge, leading to electrical failure. Warning signs: Loud screeching noise from the alternator if its bearings are failing. The vehicle’s charge/battery light may be on constantly. The vehicle may also struggle to start.

  • Water pumps: Failure will result in the insufficient circulation of the coolant in the engine, causing the engine to overheat and, if not rectified, engine failure. Warning signs: Elevated temperature reading. Signs of water leakage at the front of the engine.

  • Shock absorbers: Failure will cause an inability to efficiently control the vehicle. Generally designed for a service life of approximately 80 000 km. Warning signs: Poor ride quality. Reduced directional stability, increased braking distance, nosediving when stopping, poor handling and increased tyre and brake wear. Fluid leaking from the shock absorbers.

  • CV joints: The CV can collapse, causing the vehicle not to move and requiring removal and replacement. It’s best to replace CV joints on both sides of the vehicle. Warning signs: You’ll hear a loud clacking sound at low speed when turning sharply.

  • Clutches: A slipping clutch will not allow the gearbox to engage fully with the engine, leaving limited or no drive. Poor driving skills, such as riding the clutch, make a clutch wear faster. Warning signs: Shuddering on pull away, the engine revs without the vehicle accelerating.

  • Engine and gearbox seals: Failure leads to loss of lubricant and engine or gearbox seizure. Warning signs: Oil leaks from the front or rear of the engine, or rear of the gearbox. High oil consumption. Oil dripping onto the road surface. Total loss of lubricant.

  • Starter motors: Bearings wear out over time, causing an increased effort to turn the engine and, very quickly, a flat battery. Warning signs: The engine will turn sluggishly and take time to start, with symptoms similar to those of a flat battery, even when the battery is still charged.

  • Oil pumps: Failure means insufficient lubricant to the engine, parts seizing/engine failure. Warning signs: The oil pressure gauge or oil level warning light will indicate low oil pressure. It’s imperative to stop immediately.

  • Engine and gearbox mountings: Failure results in the engine and gearbox not being kept in their correct position/alignment, causing damage to engine and gearbox parts. Warning signs: Engine - a loud knocking sound or vibration on start-up and pull away. Gearbox – a knocking sound or vibration during pull away and gear changes.

  • Wheel bearings: The wheel bearing can disintegrate and cause the hub assembly to detach from the vehicle. The wheel, literally, comes off, resulting in no steering control. Warning signs: A shudder in the steering wheel during braking or cornering is an early warning. A good shake of the wheel top to bottom with the wheel jacked up off the ground will indicate a slight knocking feel or sound as well.

  • Universal joints (in vehicles with rear or all-wheel drive): Failure will lead to the prop shaft dropping out of the vehicle, causing serious damage to the rear differential (“diff”) and other undercarriage parts. Warning signs: A vibration through the floor of the vehicle at speed. This is similar to the symptoms of bad wheel balancing, which should be eliminated first.

A good extended or pre-owned mechanical warranty is a smart investment to make. It can also help you out of a pickle when it comes to a rental vehicle and/or accommodation when you’re stranded far from home.

Ricardo Coetzee, Head - Auto & General

1 September 2020 11:10 AM

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