ASE A4 Suspension and SteeringWheels and Tires Diagnosis and RepairMedium
After performing a tire repair using a patch-plug combination, a technician should always:
- AApply a bead sealer to the tire beads.
- BTest drive the vehicle at highway speeds immediately.
- CFill the tire with nitrogen instead of air.
- DRe-balance the tire and wheel assembly.
Show answer & explanationAnswer & explanation
Correct answer: D. Re-balance the tire and wheel assembly.
Any time a tire is dismounted, repaired, or new components (like a plug/patch) are added, the weight distribution changes. Re-balancing the assembly is crucial to prevent vibrations and ensure proper handling.
Why the other options are wrong
- A. Bead sealer is used for minor bead leaks, not a standard step after every internal patch-plug repair unless a bead leak is present.
- B. While a test drive is good practice, it should be done after re-balancing, and immediate highway speeds might not be appropriate if the balance is off.
- C. Filling with nitrogen is an optional service and not a requirement after a standard tire repair.
Post-Repair Balancing
The requirement to re-balance a tire and wheel assembly after any internal repair or dismounting.
- Ensures even weight distribution after material changes.
- Prevents vibrations and uneven tire wear.
- Crucial for maintaining ride comfort and safety.
Memory trick: After a patch, make sure the wheel is 'balanced' for a smooth ride.