Drive Chain

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Removing

-- Removing oil pan. Refer to OIL PAN

-- Remove the bolts -arrows- and the upper toothed belt guard.

Fig 1: Identifying Toothed Belt Guard Bolts

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Components could be destroyed by the toothed belt jump off.

-- Turn the crankshaft by the toothed belt crankshaft sprocket bolt until the camshaft sprocket is at "TDC".

The marking on the camshaft sprocket must align with the arrow on the toothed belt guard -top arrow-.

Fig 2: Bringing Camshaft Gear To Marking For TDC Cylinder 1
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The notch on the vibration damper must align with the arrow on the toothed belt guard -bottom arrow-.

-- Remove the guard; if necessary, release the tabs through the openings -arrows- with a small screwdriver.

Fig 3: Disengaging Locking Lugs

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-- Loosening the bolt for the oil pump chain sprocket, while doing this counterhold the crankshaft by the toothed belt sprocket bolt.

Fig 4: Identifying Bolt Loosened From Chain Sprocket Of Oil Pump

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-- Release the tension on the chain rail with a screwdriver -arrow- and secure it with the 3 mm socket wrench -1-.

Fig 5: Identifying Screwdriver And 3 mm Allen Key To Relieve Tension On Chain Rail And Lock Rail

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-- Remove the belt pulley side sealing flange. Refer to SEALING FLANGE, BELT PULLEY SIDE .

CAUTION:

Risk of destroying due to reversed running direction on a used drive chain.

Mark the drive chain running direction with arrows using paint for installation later. Do not mark the chain using a punch, notch or similar.

-- Remove the chain sprocket and oil pump drive chain.

Fig 6: Identifying Removal Of Chain Sprocket Of Oil Pump And Removal Of Chain On Differential Shaft Drive

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-- Remove the drive chain sprocket using the Kukko 44/1 tow arm puller -2- ; while protecting crankshaft end with the 40 - 105 -1-.

Fig 7: Pulling Off Chain Sprocket From Crankshaft

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Installing

Installation is done in reverse order, observe the following:

WARNING:

Risk of burning.

-- Heat the drive chain sprocket in a warming oven at 220 °C (428 °F) for approximately 15 minutes.

-- Position the drive chain sprocket on the shaft stub with pliers and slide it onto the crankshaft as far as the stop with a 30 - 100.

Fig 8: Identifying Chain Sprocket Installed Onto Crankshaft Up To Limit Stop Using Press Tube 30-100

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-- When reinstalling a used camshaft timing chain, note running direction marking.

-- Install the belt pulley side sealing flange. Refer to SEALING FLANGE, BELT PULLEY SIDE .

-- Install the balance shaft module with oil pump. Refer to BALANCE SHAFT MODULE WITH OIL PUMP .