GENERAL SPECIFICATIONS
| Item | Specification |
|---|---|
| High Temperature Nickel Anti-Seize Lubricant XL-2 | ESE-M12A4-A |
GENERAL SPECIFICATIONS
TORQUE SPECIFICATIONS
| Description | Nm |
|---|---|
| Exhaust manifold-to-Y-pipe studs (gasoline engines) | 45 |
| Exhaust manifold-to-Y-pipe nuts (gasoline engines) | 40 |
| LH catalytic converter-to-RH catalytic converter clamp nuts (4.6L engines) | 55 |
| Turbocharger-to-exhaust inlet pipe clamp nut (6.0L) | 30 |
| Y-pipe-to-converter nuts (gasoline engines) | 40 |
| Catalytic converter-to-muffler clamp nuts | 40 |
| Bracket and insulator nuts and bolt | 20 |
| Rear bracket and insulator-to-outlet pipe clamp screw | 12 |
| Exhaust inlet pipe-to-catalytic converter bolts | 47 |
| Exhaust gas recirculation (EGR) cooler clamp | 6 |
| Exhaust inlet pipe-to-exhaust manifold nuts | 27 |
TORQUE SPECIFICATIONS
The exhaust system will vary between engine, transmission and vehicle models.
| WARNING | The normal operating temperature of the exhaust system is very high. Never attempt to repair or install any new part of the system until it has cooled. Be especially careful when working around the three-way catalytic converter. The temperature of the three-way catalytic converter rises to a high level after only a few minutes of engine operation. |
| CAUTION | Do not use oil or grease-based lubricants on the isolators. They may cause deterioration of the rubber. |
| CAUTION | Oil or greased-based lubricants on the isolators may cause the exhaust hanger isolator to separate from the exhaust hanger bracket during vehicle operation. |
Note. Exhaust fasteners are of a torque prevailing design. Use only new fasteners with the same part number as the original. Torque values must be used as specified during reassembly to make sure of correct retention of exhaust components.
Use caution when removing a catalytic converter, support the catalytic converter near the rear outlet. Make sure not to damage the manifold output flare, the converter inlet flare or the studs.
During installation, clean the mating surfaces of the manifold outlet flare and the catalytic converter inlet flare, as well as the mating surfaces of the catalytic converter and the inlet pipe. Support the catalytic converter near the rear outlet. Make sure not to damage the manifold outlet flare, the converter inlet flare or the studs. To correctly seat the converter, alternately tighten the exhaust manifold-to-catalytic converter nuts to specification.
Apply anti-seize lubricant to the threads of the heated oxygen sensors (HO2S) before installation.
The exhaust system consists of the parts shown in the following illustrations and tables.
Scheme 1
Scheme 2
Scheme 3
Scheme 4
SPECIAL TOOL(S)
Scheme 5
Scheme 6
- Verify the concern by running the engine (with the vehicle on the ground) or road testing the vehicle to duplicate the condition.
- Visually inspect the components of the exhaust system and related controls that may affect exhaust gas quality or loss of power.
- Visually inspect for obvious signs of mechanical damage. Refer to the following chart. VISUAL INSPECTION CHART
- Verify that the exhaust system is installed correctly, with clamps correctly located and tightened to specification.
- If the fault is not visually evident, determine the symptom. GO to «SYMPTOM CHART»(ref-210159-S00887698112005121400000) .
Scheme 7
Scheme 8
Scheme 9
See also:
• JACKING & LIFTING