Pre-EPA07 Exhaust System

p3 mm 49.01.000
  1. On all vehicles, check the condition of the muffler body and the top stack. Check the inlet/outlet tubes for leakage, dents, and corrosion, and check for holes in the muffler. Replace parts as required. Use new parts, equivalent to parts originally installed on the ve
  2. Inspect the exhaust flex hose (see Fig.) for leakage, wear, or damage. Replace with new parts if replacement is needed.
  3. Check for leakage at the V-band coupling, which attaches the exhaust pipe to the turbocharger exhaust outlet. See Fig..

    1. Flex Hose

    2. V-Band Coupling

    3. Exhaust Pipe

    4. Turbocharger Exhaust Outlet

    Fig. 1, V-Band Coupling and Flex Hose

  4. If leakage exists, tighten the nut on the V-band coupling 85 lbf·in (940 N·cm). If leakage persists, install a new V-band coupling.
  5. Inspect the turbo outlet pipe, and replace it as needed.
  6. Check the U-bolt clamps for tightness, and tighten as needed.
  7. Check the isolator at the base of the exhaust stack elbow(s) (see Fig.), for cracking, damage, and dry rot. Replace as needed.

    1. Exhaust Pipe

    2. Exhaust Elbow Isolator

    3. Mounting Nut

    Fig. 2, Exhaust Elbow Isolator

  8. Check for leakage at all wide-band exhaust clamps. See Fig..
    If leakage exists, tighten the nuts 40 to 60 lbf·ft (54 to 81 N·m). If leakage persists, inspect the sealclamps. If necessary, install a new wide-band exhaust clamp.

    Fig. 3, Donaldson Sealclamp Wide-Band Exhaust Clamp

Note:
Parent topic: Inspection of the Exhaust System (noise emission control)
Document Number: 0000116548
Manual Publication Date: 2024-05-15
Topic Publication Date: 2024-11-22