Pre-EPA07 Exhaust System Inspection

1. Inspect the exhaust manifold at the cylinder head and at the turbocharger for leaks. See the engine manufacturer's service literature for repair procedures.
2. Inspect the muffler body, muffler outlet stack, muffler shield, and inlet tubes for leakage, dents, corrosion, or holes in the muffler.
3. Inspect the exhaust pipe and each exhaust seal clamp for leakage, wear, or damage. Replace the exhaust pipe if needed. If leakage exists at a clamp, tighten the nuts to the required torque. If leakage persists, install a new exhaust seal clamp. Do not reuse seal clamps. Once a seal clamp is loosened or removed, it must be replaced.
4. Check for leakage at the clamp that attaches the exhaust pipe to the turbocharger exhaust outlet. If leakage exists, tighten the nut on the clamp to the required torque. If leakage persists, install a new clamp.