Crankshaft Assembly Overview
For assembly work, secure the engine on the engine and transmission holder. Refer to ENGINE, SECURING TO ENGINE AND TRANSMISSION HOLDER .
If a large amount of metal shavings or particles are found when performing engine repairs, these could indicate crankshaft or rod bearings are damaged. To prevent subsequent damage, the following work must be performed after the repair: Oil channels must be cleaned carefully; replace oil spray jets, oil cooler and oil filter.
- Cylinder Block
- Cylinder bore, checking, refer to Figure
- Piston and cylinder dimensions, refer to PISTON AND CYLINDER DIMENSIONS
- Oil Spray Jet for Piston Cooling
- For crankshaft bearing 2 to 7
- Opening pressure 2.0 bar pressure
- Removal and installation, refer to Fig 3
- Bearing Shell
- For cylinder block with oil inlet bore
- Mark used bearing shells
- Replacement parts are only color coded "yellow"
- Crankshaft
- After removal, place in such a way it does not rest on sensor wheel -10- and damage it
- Measuring axial play, refer to CRANKSHAFT, MEASURING AXIAL PLAY
- Radial clearance, measuring, refer to CRANKSHAFT, MEASURING RADIAL PLAY
- Crankshaft dimensions, refer to CRANKSHAFT DIMENSIONS
- Timing chain wheel built into crankshaft
- Thrust Washer
- For bearing 5
- Observe locating point
- Lubricating groove faces crankshaft
- Bearing Cap
- Bearing cap 1: Belt pulley side
- Bearing cap 5 with notches for thrust washers
- Bearing shell retaining tabs in cylinder block and in bearing cap must align
- Bolt
- Replace
- 30 Nm plus an additional 180° (1 /2 ) turn.
- Use old bolts for radial play measurement, tighten to 30 Nm but do not tighten further
- Bearing Shell
- For bearing cap without oil groove
- Mark used bearing shells
- Replacement parts are only color coded "yellow"
- Thrust Washer
- For bearing 5
- Observe locating point
- Lubricating groove faces crankshaft
- Sensor Wheel
- For Engine Speed (RPM) Sensor -G28-
- Replace
- Installing, refer to Fig 2
- Bolt
- Replace
- If bolts were removed, replace sensor wheel
- Tightening specifications and tightening sequence, refer to Fig 2
If sensor wheel bolts were loosened, bolts and sensor wheel must be replaced.
-- Clean contact surface between crankshaft and sensor wheel, it must be free of oil and grease.
-- Lightly coat contact surface between crankshaft and sensor wheel with locking compound, locking compound.
Installation position:
- The mark "VR6" -2- must be positioned at the bore of bolt -3-, that goes into the crank pin of the crankshaft (the contour of the crankshaft is shown by the dashed line -1-).
- The gap -arrow- in the ring gear lies across from the designation.
Ignore the second "VR6" imprint -4-.
-- Tighten sensor wheel bolts in 3 stages as follows:
-- Tighten bolts by hand.
-- Tighten the bolt -3- to 10 Nm and an additional 90° (1 /4 turn).
-- Tighten both other bolts to 10 Nm and an additional 90° (1 /4 turn).