engine AUDI A4 1999 B5 / 1.G AEB ATW Engines Exhaust System Components Workshop Manual
Page 24 of 35
26-19
- Remove engine covers.
- Unbolt crankcase ventilation hose -1- at cylinder head cover and heat
shield.
- Unbolt both oil supply line bolts -2-.
- Remove heat shield -3-.
- Remove bolts -4-.
- Remove seal between turbocharger and exhaust manifold.
- Seal opening in turbocharger using clean cloth.
- Remove all nuts (arrows) from exhaust manifold.
- Remove washers and exhaust manifold.
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Page 27 of 35
26-21
Three Way Catalytic Converter (TWC),
removing and installing
Removing
Note:
Replace gaskets and self-locking nuts.
Flexpipe in front exhaust pipe must not be bent
more than 10 , otherwise it may be damaged.
- Disconnect harness connector for heated oxygen sensor (arrow) and
set aside.
Note: - Remove coolant expansion tank -2- (arrows)
- Remove wiring from Engine Coolant Level (ECL) warning switch -F66-
and lay coolant expansion tank to side.
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Page 35 of 35
26-28
Exhaust system, checking for leaks
- Start engine and run at idle.
- Seal tailpipes with cloths or equivalent for
duration of leak test.
- Listen for leaks at following connections:
cylinder head/exhaust manifold, exhaust
manifold/turbocharger, turbocharger/Three Way
Catalytic Converter (TWC), etc.
- Repair leaks.
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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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e=re
pair&id=AUDI.B5.GE02.26.1