Fastener Tightening Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Catalytic Converter Fastener (LBS, LBX, LCD) | 20 Nm | 15 lb ft |
| Catalytic Converter Fastener (LBY) | 22 Nm | 16 lb ft |
| Catalytic Converter Fastener (LBS, LBX, LCD) | 23 Nm | 17 lb ft |
| Catalytic Converter Fastener (LBY) | 20 Nm | 15 lb ft |
| Catalytic Converter Exhaust Manifold Clamp | 25 Nm | 18 lb ft |
| Exhaust Heat Shield Fastener | 9 Nm | 80 lb in |
| Exhaust Manifold Bracket Fastener | 30 Nm | 22 lb ft |
| Exhaust Manifold Fastener | 20 Nm | 15 lb ft |
| Exhaust Manifold Heat Shield | 9 Nm | 80 lb in |
| Exhaust Manifold Heat Shield Bolt | 9 Nm | 80 lb in |
| Exhaust Manifold Heat Shield Rear | 10 Nm | 89 lb in |
| Exhaust Particulate Filter Securing Fastener (LBS, LBX, LCD) | 23 Nm | 17 lb ft |
| Exhaust Particulate Filter Front Securing Fastener (LBY) | 22 Nm | 16 lb ft |
| Exhaust Particulate Filter Rear Securing Fastener (LBY) | 18 Nm | 13 lb ft |
| Exhaust Particulate Filter Fastener | 20 Nm | 15 lb ft |
| Exhaust Turbocharger Inlet Pipe Fastener | 30 Nm | 22 lb ft |
| Exhaust Front Pipe Front Fastener | 23 Nm | 17 lb ft |
| Exhaust Front Pipe Rear Fastener | 23 Nm | 17 lb ft |
| Fuel Tank Strap Fastener | 20 Nm | 15 lb ft |
| Heater Outlet Pipe Fastener | 62 Nm | 46 lb ft |
| Heat Shield Fastener | 1, 5 Nm | 13 lb in |
| Muffler Front Fastener | 25 Nm | 18 lb ft |
| Muffler Securing Fastener (LBS, LBX, LCD) | 25 Nm | 18 lb ft |
| Muffler Securing Fastener (LBY) | 18 Nm | 13 lb ft |
| Rear Muffler Fastener | 18 Nm | 13 lb ft |
| Resonator Rear Securing Fastener | 23 Nm | 17 lb ft |
| Resonator Front Securing Fastener | 23 Nm | 17 lb ft |
Note. Use of non-OEM parts may cause driveability concerns.
The exhaust system carries exhaust gases, treated by the catalytic converter, through a resonator, if applicable and into the exhaust muffler where exhaust noise is lessened.
In order to secure the exhaust pipe to the exhaust manifold, a flange and seal-joint coupling is utilized. The exhaust system may utilize a slip-joint coupling design with a clamp and a U-bolt or a flange connection with a gasket.
Exhaust hangers and rubber insulators help to support the weight of the exhaust pipe along with insulating any exhaust system vibration, rattle, or noise.
Exhaust hangers also space the exhaust system away from the underbody of the vehicle and allows the exhaust system to expand as the exhaust system warms up.
Exhaust heat shields are used to protect the body and other components from damage due to the heat from the exhaust system.
The exhaust system may be comprised of the following components
- Engine Exhaust Manifold
- Exhaust pipes
- Catalytic converters
- Muffler
- Exhaust resonator, if equipped
- Exhaust tail pipe, if equipped
- Exhaust hangers
- Exhaust heat shields