Automobile & Light Truck Certification Test A5 BrakesHydraulic System Diagnosis and RepairEasy
A technician is installing a new section of steel brake line. After double flaring the end, they notice that the flare appears uneven and slightly off-center. What is the MOST likely consequence of installing this uneven flare?
- AA persistent brake fluid leak.
- BPremature wear of the brake pads.
- CReduced brake pedal feel but no fluid loss.
- DIncreased brake fluid boiling point.
Show answer & explanationAnswer & explanation
Correct answer: A. A persistent brake fluid leak.
An uneven or off-center flare will not properly seat and seal against the mating surface, leading to a persistent brake fluid leak under pressure.
Why the other options are wrong
- B. An uneven flare has no direct impact on brake pad wear.
- C. A fluid leak will cause a soft or sinking pedal, not just reduced feel without fluid loss.
- D. An uneven flare does not affect the boiling point of the brake fluid.
Improper Brake Line Flare
An improperly formed brake line flare (uneven, cracked, or off-center) will not create a leak-proof seal, leading to brake fluid loss.
- Crucial for hydraulic integrity.
- Requires proper tools and technique.
- Failure results in leaks and potential brake failure.
Memory trick: A bad flare means a sure leak, no more brake power to speak.