1. Examine the condition of the whole exhaust system, including the silencers and mountings, for security, deterioration and completeness.

Note: The overall security of the exhaust system should be assessed; one or more exhaust mountings missing may not be a Reason for Rejection

2. With the engine running

a. check the exhaust system for leaks

Note: A durable repair to an exhaust system which effectively prevents leaks is acceptable providing the system is structurally sound

b. assess subjectively the effectiveness of the silencer in reducing exhaust noise to a level considered to be average for the vehicle.

Note: The level of exhaust noise should be assessed at all engine speeds required for the exhaust emissions check.

1.

a. A part of the system missing or excessively deteriorated

b. an exhaust system not adequately supported.

2.

a. A major leak of exhaust gases from any part of the system

Note: A minor exhaust leak from, for example, a connection joint or a pin hole, is not a Reason for Rejection

b. a silencer in such condition, or of such a type, that the noise emitted from the vehicle is clearly unreasonably above the level expected from a similar vehicle with a standard silencer in average condition