Audi Workshop Service and Repair Manuals

Removing and installing sump with balance shaft assembly and oil pump, engine code AXW, BLX, BHD, BLY, BLR, BMB

Special tools and workshop equipment required

t	T-bar and socket, 10 mm -3185-

t	Allen key, long reach -T10058-

t	Torque wrench -V.A.G 1331-

t	Flat scraper

Removing sump –  Remove noise insulation tray → General body repairs, exterior; Rep. gr.50. –  Drain off engine oil.   Note Please observe requirements for disposal. –  Remove bolts securing sump to gearbox. –  Unplug 3-pin connector from oil level and oil temperature sender -G266-. –  Slacken sump bolts at flywheel end using T-bar and socket, 10 mm -3185- and remove bolts using Allen key, long reach -T10058-. –  Remove remaining bolts and take off sump. If necessary, loosen sump by striking lightly with a rubber hammer.

–  Pull off chain guard. Retaining tabs can be released with a small screwdriver (insert in openings -arrows-).

–  Loosen bolt on oil pump chain sprocket. Counterhold on central bolt of vibration damper.

–  Use screwdriver to slacken chain rail -arrow- and lock it in position using a 3 mm Allen key -1-.

–  Detach oil pump chain sprocket and disengage chain at balance shaft drive.

–  Loosen bolts -arrows- on balance shaft assembly, working from outside inwards, and then remove balance shaft assembly. –  Remove intermediate plate. Installing sump t  Silicone sealant → Parts catalogue l  Chain tensioner must be pre-tensioned → Chapter.   Note t  The intermediate plate must always be renewed. t  Note the use-by date of the sealant. t  The balance shaft assembly with intermediate plate and sump must be installed and the securing bolts tightened immediately after the silicone sealant has been applied. –  Remove sealant residue from cylinder block using a flat scraper. –  Cut off tube nozzle at front marking (diameter of nozzle approx. 3 mm).

–  Apply silicone sealant onto clean sealing surface of new intermediate plate as illustrated. Note the following: t  The bead of sealant must be 2...3 mm thick. t  The bead of sealant must pass round the inside of the bolt holes as shown in the illustration -arrows-. t  The bead of sealant must be applied on the cylinder block side. No sealant is required on the sump side.   Note The bead of sealant must not be thicker than specified, otherwise excess sealant can enter the sump and block the strainer in the oil intake pipe.

–  Fit intermediate plate onto dowel sleeves on balance shaft assembly as shown -arrows-.

–  Install oil pump with balance shaft assembly and intermediate plate. Tighten securing bolts -arrows- to 15 Nm + 1/4 turn (90°) further, working from inside outwards.   Note Note different bolt lengths → Fig..

–  Turn crankshaft to TDC of No. 1 cylinder.

–  Marking on chain sprocket of balance shaft -arrow- must be positioned opposite the locating hole. Use locking pin -T10027- to lock chain sprocket in this position. Place chain on chain sprocket of balance shaft. –  Install oil pump chain sprocket and hand-tighten the bolt.   Note The oil pump chain sprocket can only be installed correctly in one position. When installing, you may ONLY turn the oil pump.

–  Remove locking pin -T10027- and Allen key -1-. Secure oil pump chain sprocket. Counterhold on central bolt of vibration damper. –  Fit sump immediately and tighten bolts as follows: 1 -  Pre-tighten all bolts securing sump to cylinder block very lightly in diagonal sequence. 2 -  Lightly pre-tighten bolts securing sump to gearbox. 3 -  Tighten all bolts securing sump to cylinder block slightly further in diagonal sequence. 4 -  Torque down bolts securing sump to gearbox. 5 -  Torque down all bolts securing sump to cylinder block in diagonal sequence.   Note t  When installing sump with engine removed from vehicle, ensure that sump is positioned flush with cylinder block at flywheel end. t  After fitting sump assembly, the sealant must dry for approx. 30 minutes. Then (and only then) fill the engine with engine oil. Further assembly is basically carried out in reverse order of dismantling. Tightening torque

Component		Nm
Balance shaft assembly		15 + 90° 1)2)
Chain sprocket to oil pump		20 + 90° 1)2)
Oil pipe to balance shaft assembly		10
Sump to cylinder block		15
Sump to gearbox		45
Oil drain plug		30

l  1) 90° = a quarter of a turn l  2) Renew nuts/bolts