Uniform Inspection and Communication Standards
Preamble to the Uniform Inspection & Communication Standards
--Excerpts: Exhaust Systems--
Exhaust Service Procedures Required and Suggested for Proper Vehicle Operation
WARNING: Federal EPA rules prohibit altering an exhaust system in any way that defeats the emission reduction components of a vehicle. Be sure to review and adhere to EPA policy on removing and replacing catalytic converters. Where state or local laws are stricter, they take precedence over these guidelines.
| MANIFOLD/CAST & TUBE TYPE | ||
|---|---|---|
| Condition | Code | Procedure |
| Air injection tube in manifold broken | A | Require repair or replacement of injection tube or replacement of manifold. |
| Air injection tube in manifold corroded, affecting structural integrity | 1 | Suggest replacement of injection tube or manifold. |
| Air injection tube in manifold leaking | A | Require repair or replacement of injection tube or replacement of manifold. |
| Air injection tube in manifold loose | A | Require repair. |
| Air injection tube in manifold restricted | A | Require replacement of injection tube or manifold. |
| Air injection tube in manifold threads damaged | A | Require repair of injection tube or manifold. |
| Air injection tube in manifold threads stripped (threads missing) | A | Require replacement of injection tube or manifold. |
| Bolt broken | A | Require replacement of bolts. |
| Bolt loose | A | Require tightening or replacement of bolts. |
| Bolt missing | C | Require replacement of bolts. |
| Corroded, affecting sealability | A | Require repair or replacement. |
| Cylinder head threads stripped | A | Require repair or replacement of cylinder head. |
| Gasket leaking | A | Require tightening or replacement of gasket. |
| Heat stove bent | B | Require repair or replacement of stove. See note below. |
NOTE: Stove may not be available separately; this may require replacement of manifold. |
||
| Heat stove broken | A | Require replacement of stove. See note below. |
NOTE: Stove may not be available separately; this may require replacement of manifold. |
||
| Heat stove corroded, affecting structural integrity | 1 | Suggest replacement of stove. See note below. |
NOTE: Stove may not be available separately; this may require suggesting replacement of manifold. |
||
| Heat stove missing | C | Require replacement of stove. See note below. |
NOTE: Stove may not be available separately; this may require replacement of manifold. |
||
| Manifold broken | A | Require repair or replacement. |
| Manifold cracked | B | Require repair or replacement. |
| Manifold warped | A | Require repair or replacement. |
| Out of specification | B | Require repair or replacement. |
| Stud broken | A | Require replacement of stud. |
| Stud missing | C | Require replacement of stud. |
| Stud threads damaged | A | Require repair or replacement of stud. |
| Stud threads stripped (threads missing) | A | Require replacement of stud. |
