Knowledge of Inspection, Repair and Replacement of High Performance Light Vehicle Tyres — City & Guilds Limited End-Point Assessment Motor Vehicle & Transport Revision
This element equips learners with the knowledge to inspect, repair, and replace high performance light vehicle tyres, focusing on unique construction featu
Topic Synopsis
This element equips learners with the knowledge to inspect, repair, and replace high performance light vehicle tyres, focusing on unique construction features like reinforced sidewalls and run-flat technology. It covers relevant legislation such as the Motor Vehicle Tyres (Safety) Regulations and special workplace procedures to ensure safety and compliance. The theoretical foundation prepares learners for practical tasks involving tyre identification, damage assessment, and correct use of specialist tools and materials.
Key Concepts & Core Principles
- Health and safety regulations: Understanding COSHH, manual handling, and safe use of tyre fitting equipment to prevent injury and damage.
- Tyre identification and specifications: Reading sidewall markings (e.g., size, load index, speed rating) and selecting the correct tyre for the vehicle and application.
- Fitting and balancing procedures: Correct use of tyre changers, balancers, and torque wrenches to ensure tyres are fitted securely and balanced to reduce vibration.
- Puncture repair techniques: Assessing repairable damage, using mushroom plugs or patches, and following industry standards (e.g., BS AU 159) for safe repairs.
- Wheel alignment and geometry: Understanding camber, caster, and toe angles, and using alignment equipment to adjust settings for optimal tyre wear and vehicle handling.
Exam Tips & Revision Strategies
- When explaining inspection, always mention examining for cuts, bulges, foreign objects, and uneven wear, and refer to the specific damage limits for different tyre zones.
- Integrate references to relevant legislation (e.g., Motor Vehicle Tyres (Safety) Regulations 1994) and industry standards (BS AU 159) in your answers to demonstrate compliance knowledge.
- For high performance tyres, emphasize matching tyre specifications exactly to the vehicle manufacturer's requirements, including load and speed index, and consider tread pattern symmetry.
- In practical assessments, verbalize each step you take, especially safety checks like ensuring the vehicle is secure before lifting, isolating the battery, and checking for TPMS sensors.
- Remember that repair materials must be correctly matched to tyre construction; for example, radial plugs for radial tyres, and always follow the manufacturer’s repair kit instructions.
Common Misconceptions & Mistakes to Avoid
- Confusing speed ratings (e.g., W vs Y) and assuming all tyres on a vehicle must have the same rating rather than meeting the manufacturer's minimum.
- Overlooking the inner liner inspection when repairing a puncture, focusing only on the tread area, potentially missing hidden damage.
- Assuming run-flat tyres can always be repaired; many cannot be repaired after being driven with zero pressure due to internal structural damage.
- Failing to use a calibrated torque wrench and correct torque settings, leading to over-tightening or loose wheels.
- Ignoring the age of the tyre; high performance tyres may degrade even with adequate tread due to compound hardening.
Examiner Marking Points
- Award credit for demonstrating accurate identification of tyre sidewall markings, including load index, speed rating, and construction type (e.g., radial, run-flat).
- Assessor expects knowledge of the step-by-step procedure for safe removal and refitting of wheels and tyres, including correct use of torque wrenches and sequential tightening.
- Credit for explaining the function and sensitivity of tyre pressure monitoring systems (TPMS) and the need for proper reset/relearn procedures after replacement.
- Look for understanding of repair material limitations, such as the restricted repair zones and the maximum injury size (typically 6mm in tread area) as per British Standard BS AU 159.
- Demonstrate awareness of special workplace procedures like risk assessments for high-pressure inflation cages, safe handling of run-flat tyres, and use of personal protective equipment.