volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Checking catalyst > < Removing and installing parts of exhaust system
4-cyl. injection engine (4-valve, roller rocker finger), Mechanics
Removing and installing parts of exhaust system
Exhaust manifold, front exhaust pipe and catalyst with attachments
 
N26-0357
  • Warm air collector plate
  • Lock nut, 25 Nm
  • Exhaust manifold
  • Gasket
    • ◆ Renew
  • Bracket
  • 20 Nm
  • Front exhaust pipe with catalysts
 
N26-0357
  • Lambda probe 2 after catalyst (G130)*, 50 Nm
    • ◆ Checking:

=> Repair group 24; Check functions; Check Lambda probe and Lambda regulation after catalyst

    • ◆ Grease only the threads with "G 052 112 A3"; "G 052 112 A3" must not get into the slots on the probe body
    • ◆ Remove and install with 3337
  • To silencer
  • Connector
    • ◆ For Lambda probe 2 after catalyst (G130) and Lambda probe heating (Z29)
    • ◆ Black, 4-pin
 
N26-0357
  • Connector
    • ◆ For Lambda probe 1 before catalyst (G39) and Lambda probe heating (Z19)
    • ◆ Black, 6-pin
  • Lambda probe 1 before catalyst (G39)*, 50Nm
    • ◆ Checking:

=> Repair group 24; Check functions; Check Lambda probe and Lambda regulation before catalyst

    • ◆ Grease only the threads with "G 052 112 A3"; "G 052 112 A3" must not get into the slots on the probe body
    • ◆ Remove and install with 3337
  • Locating nut, 40 Nm
  • 10 Nm
 
N26-0162

Silencer with mountings

  • Front exhaust pipe
  • Marking
    • ◆ Three times on circumference
  • Double clamp
  • Dimension-a- = ca. 5 mm
  • Carriage bolt
  • M8: 25 Nm
    M10: 40 Nm
  • Front silencer1)
  • Retaining ring
    • ◆ Renew if damaged
    • ◆ Note installation position
      => Fig. 1
  • Connecting piece
  • 15 Nm
  • Mounting
 
N26-0162
  • 20 Nm + 1/4 turn (90 °) further
  • Rear silencer1)
  • Marking
    • ◆ Visible from below
    • ◆ Double clamp -16 - for repairs
  • Separating point
    • ◆ For repair cases1)
    • ◆ Marked by indentation on connecting pipe
  • Repair double clamp
    • ◆ Must be slid onto the markings -14 -
 
N26-0162

1)     Front and rear silencers are installed as a single component as standard. In repair cases the front and rear silencers are supplied individually and a repair double clamp item 16 is supplied as a joint. Cut through connecting pipe at separating point -15 - with a body saw e.g. V.A.G 1523.

 
N26-0356

→ Fig. 1     Alignment of exhaust system

  • ● Engine must be cold.
  • ‒ Align exhaust system on retaining ring -item 8 - to achieve dimension -a-.
    Arrow points in direction of travel
         Dimension -a- = 10 ±2 mm

Checking catalyst > < Removing and installing parts of exhaust system