Pulsating Brake Pedal When Stopping Slowly Below 20 MPH: Causes, Diagnosis, and How Serious It Is
A pulsating or pulsing brake pedal when stopping slowly below 20 mph is most commonly caused by brake rotor lateral runout: commonly called warped rotors: where the rotor surface is not perfectly flat and causes the brake pad to ride up and down on the high and low spots as the wheel slows, transmitting that […]
Transmission Fluid Leak Symptoms: Slipping and Burning Smell Together
When transmission slipping and a burning smell occur together, the automatic transmission is operating with critically low or severely degraded fluid, and continued driving risks destroying the clutch packs and band friction material within a single trip. These two symptoms together are not a coincidence: they are sequential events driven by the same cause. Fluid […]
Roaring Noise From the Front of the Car That Gets Louder Turning Left: Why This Points Directly to a Wheel Bearing
A roaring noise from the front of the car that gets louder when turning left is the diagnostic signature of a failing right front wheel bearing. When the vehicle turns left, weight transfers to the right side through centrifugal force. This weight transfer loads the right front bearing more heavily, which increases the noise from […]
Transmission Rebuild Cost: Automatic Rebuild vs Remanufactured Unit
A local transmission rebuild costs $1,500 to $3,500 for most automatic transmissions, while installing a remanufactured transmission (a factory-rebuilt core-exchange unit) costs $2,000 to $4,500 including labor, with the right choice between the two depending on the specific transmission’s condition, the shop’s rebuild capabilities, and how long you intend to keep the vehicle. These ranges […]
Whirring Noise From the Front of the Engine at Idle That Stops: Diagnosing Accessory Drive and Belt System Failures
A whirring noise from the front of the engine at idle that stops is most commonly caused by a failing serpentine belt tensioner pulley bearing or idler pulley bearing that produces noise at idle but quiets when engine RPM increases and the bearing operating conditions change. The front of the engine is where all accessory […]
Whistling Noise From Vents That Stops When the Fan Is Turned Off: Causes and How to Fix It
A whistling noise from the vents that stops immediately when the HVAC fan is turned off is caused by restricted or turbulent airflow somewhere in the HVAC system: most commonly a clogged cabin air filter, a partially blocked air duct, a recirculation door that is not fully seating, or a blend door that is vibrating […]
Hyundai Tucson Engine Seizure Symptoms Before Complete Failure
Hyundai Tucson engine seizure produces several warning signs before complete failure that every owner of a 2010 to 2019 Tucson with the 2.4L Theta II GDI or 2.0L Nu engine must know: abnormal oil consumption exceeding one quart per 1,000 miles, a rhythmic knocking or rattling sound that worsens under load, metal shavings visible on […]
We Ran an Engine on 10-Year-Old Factory Coolant: pH Acidity and Heater Core Corrosion Test
A 2011 Ford F-150 with 140,000 miles arrived for a routine coolant flush. The owner confirmed no coolant had ever been added or changed. The truck had factory green coolant, which Ford specifies for replacement at 50,000 miles or 5 years, whichever comes first. This coolant was 11 years and 90,000 miles past its service […]
Gurgling Noise From the Dashboard When Heat or AC Is On: What Is Causing It and How to Fix It
A gurgling or bubbling noise from behind the dashboard when the heat or air conditioning is on is almost always caused by air trapped in the vehicle’s cooling system that has worked its way into the heater core: the small radiator behind the dashboard that heats cabin air: where it produces a liquid-and-air gurgling sound […]