sensor AUDI A6 1999 C5 / 2.G AEB ATW Engines Cylinder Head Remove And Install Workshop Manual

15-5


CAUTION!
Part numbers are listed here for reference only.
Always check with your Parts department for
the latest information. 12 -
Cylinder head cover gaskets
Replace if damaged or leakingBefore installing, seal contact surfaces with
sealant D 454 300 A2 Fig. 3
and
Fig. 4

13 -
Coolant flange
With coolant temperature sensor
14 -
Bolt 10 Nm (7 ft lb)
15 -
O-Ring Always replace
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ylinder head, removin
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15-12


Note:
For vehicles with automatic transmission, remove vacuum hose -2- from
behind vacuum booster. - Disconnect Accelerator Pedal (AP) cable from throttle valve control
module -J338- and mounting flange (arrows) without removing
positioning clip.
- Remove air guide hose -6- at throttle valve control module.
- Remove vacuum hose -1-.
- Disconnect vacuum line -3- to Evaporative Emissions (EVAP) canister.
- Disconnect vacuum hose -2- at brake servo.
- Disconnect the following harness connectors:
4 - For Intake Air Temperature (IAT) sensor -G42-
5 - For throttle valve control module -J338-

- Disconnect harness connector from Camshaft Position (CMP) sensor -
G40- (arrow).
Pa
ge 11 of 35 C
ylinder head, removin
g and installin
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11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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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
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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