Car Talk #2516: Mechanic vs. Doctor & Car Warranties, Brakes, and Driving Habits

Mechanic vs. Medical Doctor Analogy

• 💡 The show opens with a humorous analogy comparing mechanics who work on hundreds of car models to medical doctors who focus on a limited number of human models.
• 🎯 This sets a lighthearted tone, suggesting that perhaps medicine isn't as complex as it seems, playing on the idea of 'malpractice'.

Car Warranties and Registration

• 🚗 Discussions touch upon car warranties, emphasizing the importance of filling out registration cards for products.
• ❓ Callers express uncertainty about whether warranties are voided by not completing these forms.
• ✈️ A humorous example is given of a McDonald Douglas military aircraft warranty registration, listing options like 'F-14 Tom Cat' and 'ICBM anti-a missile killer satellite'.

Brake Squeal and Repair Advice

• squeal Brake squeal on a 1994 Toyota Camry is a primary caller concern, even after new pads and rotors.
• 💡 A suggested fix involves applying a thin coating of lithium grease to the backside of the brake pads and installing Teflon shims from Toyota.
• ⚠️ The hosts advise against putting grease between the pad and the disc, as it could impair stopping ability.
• 🗣️ The Midas shop's response of blaming the customer for 'glazing' the brakes is criticized as a common mechanic tactic.

Driving Speed and Car Lifespan

• 🛣️ A caller questions whether driving at higher speeds (70-75 mph) shortens a car's lifespan compared to slower speeds (65 mph).
• 💨 The hosts explain that wind resistance increases with the square of speed, leading to higher fuel consumption and increased engine strain.
• 🚗 However, they emphasize that acceleration and harsh driving habits are more damaging to an engine than steady cruising speeds, even at higher velocities.

Volvo Seat Numbness and Solutions

• 🦵 A 1990 Volvo 740 wagon owner experiences numbness in her right leg while driving, a problem not present in other cars.
• 💡 The suspected cause is the seat angle cutting off circulation, particularly above the knee.
• 🚗 While a Mercedes is humorously suggested as a cure, the hosts also propose trying bead seat covers for increased muscular stimulation and better blood flow.

1989 Lincoln Town Car for a Teen Driver

• 🎓 A caller is concerned about her 15-year-old daughter driving a large, gas-guzzling 1989 Lincoln Town Car.
• 🛠️ The hosts recommend ensuring the car is in good mechanical condition (fluids, belts, hoses, tires) and providing driving lessons for the large vehicle.
• 🚧 They suggest that while the car handles poorly, it offers significant safety due to its size and metal, and that the daughter is unlikely to get into serious trouble with it.