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Home >> Audi >> 2012 >> Q7 3.0 TDI >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (3.0L - Exhaust System & Emission Controls - Engine Code(S): CJTB, CJTC, CNAA, CJWB, CJWC, CJWE, CTWA, CTWB) >> 26 Exhaust System, Emission Controls >> Exhaust Manifold >> Overview - Exhaust Manifold

Overview - Exhaust Manifold

WARNING: This page is about a different variant/trim than selected.
Fig 1: Exhaust Manifold, Component Overview (Left Side Shown)
GWWA26-10031Courtesy of AUDI OF AMERICA, LLC
  1. Nut
    • Replace
    • Coat the thread with hot bolt paste.
    • Tightening specification and sequence. Refer to Fig 2, Fig 3
  2. Bracket
    • For heat shield
  3. Exhaust Manifold
  4. Seal
    • Replace
  5. Heat Shield
  6. Bolt
    • Tightening specification: 9 Nm
  7. Heated Oxygen Sensor
  8. Catalytic Converter
  9. Nut
    • Tightening specification: 23 Nm
    • Replace
    • Coat the thread with hot bolt paste.
  10. Seal
    • Replace
Fig 2: Exhaust Manifold Tightening Sequence
GWWA26-10142Courtesy of AUDI OF AMERICA, LLC
NOTE:

Replace the nuts.

Coat the thread on the nut with hot bolt paste.

-- Tighten the nuts in 3 steps according to the tightening sequence:

Step Nuts Tightening Specification
1 1 to 9 Install all the way in by hand.
2 -1 to 9- 15 Nm
3 -1 to 9- 25 Nm
Fig 3: Exhaust Manifold Tightening Sequence
GWWA26-10143Courtesy of AUDI OF AMERICA, LLC
NOTE:

Replace the exhaust manifold nuts.

Coat the thread on the nut with hot bolt paste.

-- Tighten the nuts in 3 steps according to the tightening sequence:

Step Nuts Tightening Specification
1 -1 to 9- Install all the way in by hand.
2 -1 to 9- 15 Nm
3 -1 to 9- 25 Nm