engine coolant AUDI A4 1999 B5 / 1.G 01A Transmission Remove And Install Workshop Manual

34-19

4-cylinder engine

- Disconnect wires/and harness connectors as follows:
1 - At solenoid valve for wastegate bypass regulator valve -N75-
2 - At Evaporative Emission (EVAP) canister purge regulator valve -N80-
3 - At power output stage -N122-
4 - At Mass Air Flow (MAF) sensor -G70-
- Disconnect hoses and remove air cleaner housing (arrows).
- Remove coolant expansion tank and lay to one side.

Repair Manual, Engine Mechanical, Repair Group 26
Note:
Do not bend flex pipe on front exhaust pipe more than 10 . - Remove harness connector for Heated Oxygen Sensor (HO2S) (arrow)
and move wiring clear.
- Remove nuts securing turbocharger to front exhaust pipe.
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34-20

6-cylinder engine

All models - Remove intake air duct -A- (arrows)
- Unbolt coolant expansion tank -B- (arrows) and lay to one side.
- Remove Heated Oxygen Sensors (HO2S) on left and right exhaust
pipes using 3337 ring spanner 7-piece set and move clear to side.
- Remove engine/transmission mounting bolts accessible from above.

- Remove noise insulation panel (arrows).
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