Volkswagen Golf Variant / Jetta. Manual - part 451

out and tail pipes is uniform on left and right.

1.10

Exhaust System, Checking for Leaks

Test Sequence
– Start the engine and let it run in idle.
– Seal the tailpipes, for example with cloth or plug, for the dura‐

tion of the leak test.

– Check the connections in the exhaust system for leaks by lis‐

tening.

– Repair the determined leaks.

1. Exhaust System    

387

Exhaust System, Engine Codes

CBDA, CBDB and CEGA

⇒ “2.1 Overview - Front Exhaust Pipe with Particulate Filter”, page

388
⇒ “2.2 Particulate Filter, Removing and Installing”, page 391
⇒ “2.3 Overview - Muffler”, page 395
⇒ “2.5 Exhaust System, Installing without Tension”, page 397

2.1

Overview - Front Exhaust Pipe with Par‐

ticulate Filter

Note

♦

Exhaust Manifold, Removing and installing. Refer to

⇒ “3.1 Overview - Turbocharger with Exhaust Manifold and

Attachments”, page 270

 .

♦

After exhaust system repairs, make sure exhaust system is

not under stress and that it has sufficient clearance from the

bodywork. If necessary, loosen the double clamp and align the

muffler and exhaust pipe so that sufficient clearance is main‐

tained to the body and the mountings carry even loads.

♦

Replace the self-locking nuts.

Special tools and workshop equipment required
♦ Ring Wrench 7-Piece Set - 3337-

Note

If the particulate filter of the Exhaust Pressure Sensor 2 - G451-

is being replaced, the Exhaust Pressure Sensor 2 - G451- must

be adapted using the Vehicle Diagnostic Tester : Guided Func‐

tions, Adapt the Exhaust Pressure Sensor 2 - G451- .

388

- G451-
2 - 10 Nm
3 - Shield
4 - Heated Oxygen Sensor -

G39-

❑ 50 Nm
❑ Grease only the threads

with Hot Bolt Paste - G

052 112 A3- ; Hot Bolt

Paste - G 052 112 A3-

must not get into the

slots on the probe body

❑ To remove, use the Ring

Wrench 7-Piece Set -

3337-

5 - Exhaust Gas Temperature

Sensor 4 - G648-

❑ 45 Nm
❑ Coat the thread on the

sensor with Hot Bolt

Paste - G 052 112 A3-

6 - Seal

❑ Replace
❑ Note the installation po‐

sition

7 - Clamp, 7 Nm
8 - Exhaust Gas Temperature

Sensor 3 - G495-

❑ 45 Nm
❑ Coat the thread on the

sensor with Hot Bolt

Paste - G 052 112 A3-

9 - 25 Nm
10 - Mount

❑ Replace if damaged

2. Exhaust System, Engine Codes CBDA, CBDB and CEGA    

389

Caution

There is a risk of damag‐

ing  the  decoupling  ele‐

ment between the partic‐

ulate  filter  and  NOx

reduction  catalytic  con‐

verter.  When  removing

and installing:

♦

Do not bend the decou‐

pling element more than

10°.

♦

Do not stretch the decou‐

pling element.

♦

Do not damage the wire

mesh on the decoupling

element.

♦

Use the Transportation

Lock - T10404- to secure

the decoupling element

from stretching.

❑ With oxidation catalytic converter and front exhaust pipe
❑ After replacing, the adaptation of the soot load comparison must be set to “0” using the Vehicle Diagnostic

Tester “Guided Functions”.

❑ Removing and installing. Refer to 

⇒ “2.2 Particulate Filter, Removing and Installing”, page 391

 .

12 - 25 Nm
13 - Bracket

❑ Bolted to the cylinder block

14 - Control wire, 45 Nm
15 - Bracket

❑ Attached to the particulate filter

16 - Clamp

❑ Replace

17 - Bracket

❑ Attached to the cylinder head

18 - 25 Nm
19 - 8 Nm
20 - 25 Nm

Clamping sleeve installation position
– Position the double clamp at a distance -a- = 5 mm in front of

the marking on the front exhaust pipe for the particulate filter.

390