LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2012 >> Q7 3.0 TDI >> Repair and Diagnosis >> External Pages >> Different car >> Section 30 (4.2L - Exhaust System & Emission Controls - Engine Code: Bar) >> 26 Exhaust System, Emission Controls >> Description And Operation >> Exhaust Manifold Overview

Exhaust Manifold Overview

WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Exhaust Manifold, Assembly Overview
GWWA26-10277Courtesy of AUDI OF AMERICA, LLC
  1. Nut
    • Replace
    • Grease with hot bolt paste; Hot bolt paste.
    • Tightening sequence, refer to Fig 2, and Fig 3
  2. Exhaust Manifold
  3. Gasket
    • Replace
  4. Nut
    • Tightening specification: 23 Nm
    • Replace
    • Tighten evenly in several stages
  5. Primary Catalytic Converter
  6. Gasket
    • Replace
  7. Securing Strip
    • Remains installed when removing exhaust manifold
  8. Nut
    • Tightening specification: 25 Nm
    • Replace
    • Grease with hot bolt paste; Hot bolt paste
  9. Securing Strip
    • Remains installed when removing exhaust manifold
  10. Nut
    • Tightening specification: 25 Nm
    • Replace
    • Grease with hot bolt paste; Hot bolt paste
Fig 2: Left Exhaust Manifold Tightening Sequence
GWWA26-10389Courtesy of AUDI OF AMERICA, LLC

-- Tighten nuts in 3 stages in -1 to 6- sequence as follows:

-- Tighten nuts by hand.-- Pre-tighten nuts to 20 Nm.-- Tighten nuts to 30 Nm.
Fig 3: Right Exhaust Manifold Tightening Sequence
GWWA26-10308Courtesy of AUDI OF AMERICA, LLC

-- Tighten nuts in 3 stages in -1 to 6- sequence as follows:

-- Tighten nuts by hand.-- Pre-tighten nuts to 20 Nm.-- Tighten nuts to 30 Nm.