1999 AUDI A6 coolant

15-16

- Perform throttle valve control module adaptation
to Engine Control Module (ECM).

Repair Manual, 1.8 Liter 5V Turbo Fuel
Injection & Ignition, Repair Group 24
Tightening torques

Component

Tightening
torques
Intake manifold to cylinder
head 10 Nm (7 ft lb)
Intake manifold brace to intake
manifold 20 Nm (15 ft lb)
Intake manifold to bracket 20 Nm (15 ft lb)
Fuel supply rail to intake
manifold 10 Nm (7 ft lb)
Coolant line to coolant flange 10 Nm (7 ft lb)
Coolant line to intake manifold 10 Nm (7 ft lb)
Pa
ge 16 of 35 C
ylinder head, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.2

15-21


- Remove Ground (GND) connection.
- Drain coolant Page 19
-4 .
- Remove intake manifold Page 15
-10
.
- Remove ribbed belt and ribbed belt tensioner Page 13
-15
.

- Remove the following lines/harness connectors:
1 - At Wastegate Bypass Regulator Valve -N75-
2 - At Evaporative Emission (EVAP) Canister Purge Regulator Valve -
N80-
3 - At Power outage stage -N122-
4 - At Mass Air Flow (MAF) sensor -G70-
- Pull off hose connections and remove air cleaner element housing
(arrows).
Pa
ge 21 of 35 C
ylinder head, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.2

15-22


- Disconnect harness connector -1- at Engine Coolant Temperature
(ECT) sensor -G2-/-G62-.
- Disconnect harness connector -2- at temperature sensor II -G18-.
- Unclip all connections from cylinder head and move clear.

- Remove crankcase ventilation line -1-.
- Remove oil supply line at cylinder head -2-.
- Remove heat shield -3-.
- Unbolt turbocharger from exhaust manifold -4-.
- Disconnect coolant hose to heat exchanger at rear of cylinder head,
also detach retaining clamps at connecting flange.
- Remove upper toothed belt cover Page 13
-29
.
Pa
ge 22 of 35 C
ylinder head, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.2

15-25

Cylinder head, installing


Note:

Always replace cylinder head bolts.
Note inner 12-point or Polydrive versions of
cylinder head bolts Page 15
-1 .

Always replace self-locking nuts, bolts, gaskets
and O-rings.
Carefully remove any sealant residue from
cylinder head or engine block repairs. Avoid
any scratches or scoring.
Thoroughly remove all sanding and grinding
residue.
Do not remove new cylinder head gasket from
package until immediately before installing.
Handle gasket with extra care. Silicon layer and
grooved areas can be damaged leading to
leakage.
Pocket holes in engine block for cylinder head
bolts must be free of oil and coolant.
Pa
ge 25 of 35 C
ylinder head, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.2

15-28

- Install ribbed belt and ribbed belt tensioner
Page 13
-15
.

Note:
When installing ribbed belt, make sure it is
seated correctly on the pulleys.

- Adjust Accelerator Pedal (AP) cable.

Repair Manual, Fuel Supply System, Repair
Group 20


- Replace coolant Page 19
-6 .

CAUTION!

Be sure the ignition is switched OFF. Failure
to do so may damage the Engine Control
Module (ECM).

- Switch ignition off and reconnect battery Ground
(GND) strap.

- After connecting battery, enter anti-theft code for
radio.

Pa
ge 29 of 35 C
ylinder head, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.15.2