Volkswagen Golf / Golf GTI / Jetta. Manual — part 48

15-81

Note:

When the cylinder head is installed
the holes in the cylinder head gasket
are only half visible.

The rest of the assembly is basically
in reverse order to the disassembling
sequence.

Note:

Ensure that the O-ring for sealing the
oil channel and the seal in the cover
are installed.

- Remove old sealing compound

from 3 mm holes in cylinder head
gasket (arrows).

- Adjust valve timing

Page 15-

39

.

- Install cylinder head cover and

intake manifold

Page 15-16

,

Removing and installing cylinder
head

- Check camshaft adjustments

Page 15-82

.

Valve gear, servicing

15-82

Camshaft adjustment, checking

Function

The camshaft timing adjustment is dependent

upon load and speed. Oil pressure is directed to
the camshaft timing adjuster (mechanical
adjustment unit) by the camshaft timing
adjustment solenoid valve and the camshaft
adjuster then adjusts the camshaft.

Special tools and equipment

V.A.G 1551 Scan Tool (or vehicle system tester

V.A.G 1552) with cable V.A.G 1551/3

Note:

All functions which could previously be

performed with V.A.G 1551/1552 can also be
performed with the new tester VAS 5051.

Valve gear, servicing

15-83

Test conditions

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s): BDF, Repair Group 01

Checking activation

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s): BDF, Repair Group 01

Fuses must be OK.

Battery voltage must be at least

11.5 V.

All electrical consumers, e.g.

lights and rear window defroster
must be switched off.

If the vehicle is equipped with air

conditioning, this must be
switched off.

Selector lever must be in

position "P" or "N" on vehicles
with an automatic transmission.

Engine oil level OK, checking

Page 17-8

, Fig. 2

No DTCs may be stored in the

DTC memory:

- Check Valve -1- for camshaft

adjustment -N205- and Camshaft
adjuster valve 1 (exhaust) -N318-
via output Diagnostic Test Mode
(DTM):

Valve gear, servicing

15-84

If activation is OK.:

Checking function of camshaft timing
adjuster

Test conditions

Coolant temperature must be at least 85

C,

display group 1, display zone 2.

Test sequence

- Connect V.A.G 1551 Scan Tool (or V.A.G 1552).

Start engine and select "Address word" 01 of
engine control module. Connect Scan Tool and
select engine control module:

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

Rapid data transfer

HELP

Select function XX

Indicated on display

- Press keys 0 and 4 for function "Initiate basic

setting" and confirm entry with Q key.

Basic setting

Input display group number XXX

Indicated on display

- Press keys 0, 0 and 1 for "Display group number

1" and confirm entry with Q key.

Valve gear, servicing