Oil Pump With Balance Shaft Drive

Special tools and workshop equipment required 

• Connecting pin T10027
• Flat scraper
• Silicone sealant D 176 404 A2

Removing 

-- Remove the oil pan. Refer to OIL PAN .

-- Remove the chain guard. Disengage the locking lugs through the openings -arrows- if necessary using a small screwdriver.

Fig 1: Locating Locking Lugs

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-- Remove the oil pump chain sprocket bolt. The center bolt of the vibration damper can be counter held.

Fig 2: Identifying Bolt Loosened From Chain Sprocket Of Oil Pump

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-- Release the tension on the tensioning rail using a screwdriver in the -direction of the arrow- and secure it using an 3 mm hex wrench -1-, across the flats.

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

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-- Remove the oil pump chain sprocket and remove the chain from the balance shaft drive.

Fig 4: Identifying Removal Of Chain Sprocket Of Oil Pump And Removal Of Chain On Differential Shaft Drive

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-- Loosen the oil pump with balance shaft bolts working from the outside toward inside and remove it. Oil pump with balance shaft assembly overview. Refer to OIL PUMP WITH BALANCE SHAFT DRIVE ASSEMBLY OVERVIEW .

Fig 5: Identifying Bolts Of Balancer Shaft Assembly

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-- Remove the intermediate plate.

Installing and Adjusting 

• Preload the chain tensioner. Refer to CHAIN TENSIONER PRE-TENSIONING .

-- Remove the sealant residue from the cylinder block with a flat scraper.

-- Cut the tube nozzle at the front marking (nozzle diameter approximately 3 mm).

-- Apply the silicon sealant to a clean sealing surfaces of the new intermediate plate as shown.

Fig 6: Identifying Application Of Sealant Bead To Inner Side In Area Of Screw Holes

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Note the following points:

• The sealant bead must be 2 to 3 mm thick.
• Sealant bead must continue to the inner side of the bolt holes -arrows-.
• Sealant bead must be on the cylinder block. No sealant is necessary on the oil pan.

-- Place the intermediate plate as shown onto the alignment pins -arrows- of balance shaft drive.

Fig 7: Identifying Intermediate Plate Placed On Alignment Bushings Of Differential Shaft Gear

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-- Install the oil pump with balance shaft gear and intermediate plate. Tighten the bolts -arrows- from the inside toward the outside.

Fig 8: Identifying Bolts Of Balancer Shaft Assembly

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• Tightening specification: 15 Nm + 90° (1/4) additional turn

-- Turn the crankshaft to set cylinder 1 at Top Dead Center (TDC).

Fig 9: Identifying Camshaft Gear Rotated To Mark For TDC Cylinder 1

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-- Set the mark on the balance shaft chain sprocket -arrow- opposite alignment bore. Secure the chain sprocket in this position using the T10027. Place the chain onto the balance shaft chain sprocket.

Fig 10: Identifying Mark At Chain Sprocket Of Balancer Shaft Aligned With Fixture Hole

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-- Install the oil pump chain sprocket and tighten the bolt by hand.

-- Remove the T10027 and 3 mm hex wrench -1-. Tighten the oil pump chain sprocket bolt.

Fig 11: Identifying Screwdriver And 3 mm Allen Key To Relieve Tension On Chain Rail And Lock Rail

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• Tightening specification: 20 Nm + 90° (1/4) additional turn

-- Center bolt of the vibration damper can be counter held.

Fig 12: Identifying Bolt Allocation Of Differential Shaft Gear

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A - M7 x 40

B - M7 x 70

C - M7 x 90

D - M7 x 55

E - Sealing plug with O-ring

The rest of the assembly is basically a reverse of the removal sequence.

-- Install the oil pan. Refer to OIL PAN .