Audi Workshop Service and Repair Manuals

Removing and installing exhaust gas temperature sender 1 for cylinder bank 2 -G236- Special tools and workshop equipment required

t  Engine and gearbox jack -V.A.G 1383 A-

t  Spark plug connector pliers -V.A.G 1922- Removing   Note t  Fit all heat insulation sleeves in the original position when installing. t  All cable ties which are released or cut open when removing must be fitted in the same position when installing.

–  Remove noise insulation -arrows-.

–  Unbolt heat shield -1- for drive shaft (left-side). –  Detach drive shaft (left-side) from flange shaft of gearbox.

–  Slacken hose clip -1- on heat shield for front exhaust pipe   Note Disregard -item 2-.

–  Remove cover -1- at right of engine compartment.   Note Disregard items marked -2- and -3-.

–  Unfasten screw connections -arrows- and detach engine cover panels -A ... C-.

–  Unscrew hose connections and bolt connections on the air duct at the points indicated by -arrows- and remove the air duct.

–  Detach vacuum line -arrow- going to brake servo at bulkhead.

–  Unbolt coolant expansion tank -2--arrows-. –  Unplug electrical wire for coolant shortage indicator switch -F66- at bottom of expansion tank and move expansion tank to one side with coolant hoses -1- and -3- attached.

–  Detach rubber seal from plenum chamber cover in direction of -arrow-. –  Detach plenum chamber cover -1- towards the front.

–  Remove cover for electronics box in plenum chamber -arrows-.

–  Carefully lever off retaining strap with a screwdriver -arrow-. –  Lay aside engine control unit with electrical connectors attached.

–  Release retainer -arrow- and pull auxiliary relay carrier in electronics box upwards to remove. –  Disconnect the electrical connectors at connector point using spark plug connector pliers -V.A.G 1922-.

–  Detach earth connection -2- and retainer -1- for electrical connectors from bulkhead. –  Disengage engine wiring harness at electronics box and bulkhead -arrows- and move clear.

–  Take electrical connectors -2-, -4- and -5- out of bracket (left-side) on bulkhead and unplug. –  Remove heat insulation sleeve at wiring harness and move wire to Lambda probe clear.

–  Unscrew bolts -1- and -3- for heat shield.   Note Disregard -item 2-. –  Unscrew Lambda probe from front exhaust pipe (left-side). –  Bend heat shield for front exhaust pipe to the side.

–  Unscrew exhaust gas temperature sender 1 for cylinder bank 2 -G236--arrow- from exhaust manifold flange. –  Move electrical wire to control unit for exhaust gas temperature sender clear.

–  Unplug electrical connectors -1- and -2-. –  Unbolt the control units for exhaust gas temperature senders from intake manifold -arrows-. –  Remove exhaust gas temperature sender 1, bank 2 -G236- with control unit (black connector). Installing Installation is carried out in the reverse order; note the following:   Note t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue. t  Fit all heat insulation sleeves in the original position when installing. t  Fit all cable ties in the original positions when installing. Tightening torques

Component	Nm
Exhaust gas temperature sender 1, bank 2 -G236- to exhaust manifold	27
Control unit for exhaust gas temperature sender to intake manifold	8 1)
Lambda probe to front exhaust pipe	55
Heat shield for front exhaust pipe	10
Air duct to intake manifold	10
Drive shaft heat shield to gearbox	23
l  1) Renew self-locking nuts.