Intake Camshaft Balance Shaft

Special tools and workshop equipment required

Puller T10394
Puller T10055

Removing

NOTE:

The intake camshaft balance shaft must be replaced after removal.

-- Remove the coolant pump toothed belt. Refer to COOLANT PUMP TOOTHED BELT .

-- Remove the camshaft timing chain. Refer to CAMSHAFT TIMING CHAIN .

-- Remove the balance shaft timing chain. Refer to BALANCE SHAFT TIMING CHAIN .

-- Remove the intermediate shaft sprocket -1-.

Fig 1: Identifying Intermediate Shaft Sprocket

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-- Remove the bolt -2- on the intake camshaft balance shaft.

Fig 2: Identifying Intake Camshaft Balance Shaft

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-- Install the half shell T10394/1 from the T10394 and turn it upward in direction of -arrow-.

Fig 3: Identifying Half Shell -T10394/1-

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-- Install the T10394 and push the sliding sleeve in direction of -arrow-.

Fig 4: Identifying Installation Of Puller Pieces -T10394- And -T10394/1-

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-- Install the T10055 into the T10394 and remove the balance shaft in direction of -arrow-.

Fig 5: Identifying Installation And Operation Of Puller -T10055-

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Installing

NOTE:

Because of the small clearance between the balance shaft and the 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.

For the correct tightening specifications, refer to BALANCE SHAFT TIMING CHAIN OVERVIEW .

-- 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 6: Identifying Intake Camshaft Balance Shaft

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

Fig 7: Bearing Pins, Installation Position

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-- 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 shaft sprocket. Otherwise the backlash will not adjust itself and it could result in engine damage.

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

-- Mark the tooth face on the intermediate shaft sprocket with paint -arrows-.

Fig 8: Identifying Tooth Face On Intermediate Shaft Sprocket Marked With Paint

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

-- Tighten the intermediate shaft sprocket bolt -1- : Tightening sequence, refer to Figure.

Fig 9: Identifying Intermediate Shaft Sprocket

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

NOTE:

Due to the ratio, the marking align only every 7th turn.

Further installation is performed in reverse order of removal, noting the following:

-- Install the balance shaft timing chain. Refer to BALANCE SHAFT TIMING CHAIN .

-- Install camshaft timing chain. Refer to CAMSHAFT TIMING CHAIN .

-- Install the lower timing chain cover. Refer to LOWER TIMING CHAIN COVER .

-- Install the timing chain guard upper section. Refer to UPPER TIMING CHAIN COVER .

-- Install the ribbed belt tensioning damper. Refer to RIBBED BELT TENSIONER .

-- Install the ribbed belt. Refer to RIBBED BELT .

-- Adjust the subframe mount. Refer to SUBFRAME MOUNT, ADJUSTING .

-- Replace the coolant pump drive seal. Refer to COOLANT PUMP DRIVE SHAFT SEAL .

-- Install the coolant pump toothed belt. Refer to COOLANT PUMP TOOTHED BELT .