Balance Shaft, Removing And Installing, Intake Side: Installing

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NOTE:

Because of the small clearance between the balance shaft and cylinder block, the balance shaft may need to be cooled in order to install it. Check if the balance shaft can be inserted into the cylinder block without forcing it in. If this is not the case, then the balance shaft must be installed cooled.

-- Place the new balance shaft in a freezer for 30 minutes or spray it with commercially available cooling spray.

-- Lubricate the balance shaft bearing with engine oil.

-- Install the new intake camshaft shim and tighten the bolt -2-.

Fig 1: Identifying Intake Camshaft Balance Shaft

Courtesy of AUDI OF AMERICA, LLC

-- Replace the O-ring -1- and coat with engine oil.

Fig 2: Bearing Pins Installation Position

Courtesy of AUDI OF AMERICA, LLC

-- Coat the mounting pin with engine oil and insert it. The alignment pin -arrow- for the mounting pin must engage in the hole in the cylinder block.

CAUTION:

Always replace the intermediate sprocket. Otherwise the backlash will not adjust itself and it could result in engine damage.

The new intermediate sprocket has an anti-friction coating that wears off after a short period of use, which automatically adjusts the backlash.

-- Use color to mark the tooth face on the intermediate sprocket -arrow-.

Fig 3: Identifying Tooth Face On Intermediate Shaft Sprocket Marked With Paint

Courtesy of AUDI OF AMERICA, LLC

-- Install the intermediate sprocket; the marking on the balance shaft must be between the markings on the tooth faces.

-- Tighten the bolt -1- for the intermediate sprocket: tightening sequence, refer to Fig 4.

Fig 4: Identifying Intermediate Shaft Sprocket

Courtesy of AUDI OF AMERICA, LLC

Fig 5: Identifying Intermediate Shaft Sprocket

Courtesy of AUDI OF AMERICA, LLC

-- Check the markings on the intermediate sprocket/balance shaft -arrow-.

Further installation is done in the reverse order of removal. Note the following:

-- Install the balance shaft drive chain, refer to BALANCE SHAFT DRIVE CHAIN, REMOVING AND INSTALLING .

-- Install the camshaft timing chain, refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .

-- Install the lower timing chain cover, refer to LOWER TIMING CHAIN COVER, REPLACING .

-- Install the upper timing chain cover, refer to UPPER TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Replace the balance shaft sealing ring on the intake side, refer to BALANCE SHAFT SEALING RING, REPLACING, INTAKE SIDE .

-- Install the toothed belt on the coolant pump, refer to COOLANT PUMP TOOTHED BELT, REMOVING AND INSTALLING .

-- Install the radiator and fan shroud:

Non-hybrid vehicles, refer to RADIATOR, REMOVING AND INSTALLING NON-HYBRID VEHICLES .
Hybrid vehicles, refer to RADIATOR, REMOVING AND INSTALLING, HYBRID VEHICLES .

Tightening specifications

Refer to OVERVIEW - BALANCE SHAFT