Cylinder block, crankshaft and flywheel, disassembling and assembling
NOTE:
Replace all gaskets and seals.
NOTE:
The following list refers to items in Fig 1.
- Thrust washers
- Measuring axial clearance of crankshaft. See AXIAL AND RADIAL CLEARANCE OF CRANKSHAFT, MEASURING .
- Thrust washer only fitted on 4th crankshaft bearing
- Special bolt (double hex)
- Always replace
- Dual-mass flywheel: 60 Nm + 180° (1/2 turn)
- Dual-mass flywheel
- Removing and installing. See DUAL-MASS FLYWHEEL/DRIVE PLATE; INSTALLATION DIMENSIONS, REMOVING AND INSTALLING .
- Removing and installing needle bearing. See NEEDLE BEARING IN DUAL-MASS FLYWHEEL, REMOVING AND INSTALLING .
- Crankshaft bearing
- Checking axial and radial clearance. See AXIAL AND RADIAL CLEARANCE OF CRANKSHAFT, MEASURING .
- Bolt, tightening torque 10 Nm
- Oil spray jet
- For piston cooling.
- Oil seal for rear sealing flange
- Replacing. See CRANKSHAFT OIL SEALS, REPLACING .
- Bolt, tightening torque 10 Nm
- Rear sealing flange
- Gasket
- Bolt, tightening torque 25 Nm
- Screw in bolts on left and right sides finger-tight before tightening bolts on main bearing caps.
- Cylinder block
- Gasket
- Collar bolt, tightening torque 30 Nm
- Apply Loctite when installing
- Bolt, tightening torque 10 Nm
- Front sealing flange
- Expansion pins
- Crankshaft
- Checking. See AXIAL AND RADIAL CLEARANCE OF CRANKSHAFT, MEASURING .
- Chain sprocket for oil pump
- Removing and installing. See CHAIN SPROCKET FOR OIL PUMP ON CRANKSHAFT, REMOVING AND INSTALLING .
- Pistons
- Checking. See PISTONS AND PISTON RINGS, CHECKING .
- Piston rings
- Checking, see PISTONS AND PISTON RINGS, CHECKING
- Circlip for piston pin
- Piston pin
- Connecting rod
- Mark cylinder number and installation position of matching connecting rods and bearing caps before removing
- Installation position: wider, slightly convex machined surfaces on the same side
- Connecting rod bearing
- Do not interchange used bearing shells.
- Connecting rods, connecting rod bearings, see CONNECTING RODS, CONNECTING ROD BEARINGS, CHECKING
- Connecting rod bearing bolts
- Always replace
- Tightening torque: 30 Nm + 90° (1/4 turn)
- When measuring radial clearance, tighten to 20 Nm but do not turn further.
- Main bearing cap
- Marking -1- on oil pump side
- Replace bolts for main bearing caps
- Watch position of dowel sleeves
- Checking bearing clearnce, see AXIAL AND RADIAL CLEARANCE OF CRANKSHAFT, MEASURING
- Bolts for main bearing caps
- Always replace
- Tightening torque, see TIGHTENING SEQUENCE
- Tightening sequence, see TIGHTENING SEQUENCE