Measuring crankshaft, fitting new bearings - RA03001043200X(03-3200)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Preceding work:

Crankshaft removed

Engine disassembled, cleaned

Crankshaft inspected, cleaned

Operation no. of operation texts and work units or standard texts and flat rates:

Mounting crankshaft radially in bearings

Fig 1: Measuring Bearing Bore Dia And Radial Bearing Play

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Crankshaft bearing cap	install, tighten (30 Nm).
Bearing bore Ø	measure, note.
Crankshaft bearing journal Ø	measure, note (03-3190) .
Bearing shells	match, see table "Bearing shells for crankshaft".

EXAMPLE:

Bearing bore dia Ø	62.51 mm
Crankshaft journal Ø	- 57.95 mm
Crankshaft journal Ø	4.55 mm
Radial bearing play	-0.04 mm
Radial bearing play	4.51 mm : 2
Bearing shell thickness	2.25 mm

see table "Bearing shells for crankshaft"

Top bearing shell "blue"

Bottom bearing shell "blue"

When determining different bearing shells, match thicker bearing shell to the bearing cap.

Likely radial bearing play	calculate.
Bolt holes	blow clean.
Bearing shells	insert into crankcase and bearing cap.
Bearing cap bolts	tighten (30 Nm).
Bearing Ø	measure.
Radial bearing play (real play) (Specification 0.035-0.045 mm)	calculate.
Bearing cap	remove.
Bearing shells in crankcase	oil.
Crankshaft at bearing points	oil.
Bearing caps with bearing shells	oil, install.
Thread and contact surface of bolts	oil, install.
Bolts	tighten to tightening torque and tightening angle (55 Nm+90° tightening angle). Rotate crankshaft while tightening the bolts in order to detect any jamming in good time.

Mounting crankshaft axially in bearings

Fig 2: Measuring Bearing Width At Crankshaft And Thrust Washers

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fit bearing width at crankcase and at fit bearing cap	measure, note.
Fit bearing width at crankshaft	measure, note.
Thrust washers	match. Thrust washers of the same thickness must always be inserted on one side in the crankcase and in the bearing cap. The oil grooves must face toward the contact surface of the crankshaft and be oiled. The anti-twist lock is on the thrust washer in the bearing cap.
Likely axial bearing play	calculate.
Axial bearing play with crankshaft installed	measure. (Specification 0.100-0.250 mm).

Bearing diagram of crankshaft

Fig 3: Identifying Bearing Shells In Crankcase And Bearing Shells In Bearing Caps

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

FINISHING DIMENSIONS AND IDENTIFICATION OF BASIC BORES OF CRANKCASE

Bore Ø

Bearing points

Identification ⁽¹⁾

Size

Fit bearing width

62.500-62.506

1, 5, 7

1 chisel punch

Standard

19.979-20.000

62.506-62.513

1, 5, 7

2 chisel punches

Standard

19.979-20.000

62.513-62.519

1, 5, 7

3 chisel punches

Standard

19.979-20.000

62.500-62.506

2, 3, 4, 6

2 chisel punches

Standard

19.979-20.000

62.506-62.519

2, 3, 4, 6

3 chisel punches

Standard

19.979-20.000

⁽¹⁾	The finishing tolerance stages are indicated by punch marks in the contact surface of the oil sump, in each case next to the crankshaft bearing.

Permissible difference of fit bearing contact surfaces laterally from rectangularity related to the diameter of the 1st and 7th crankshaft bearing point

0.03

BEARING SHELLS FOR CRANKSHAFT BEARINGS (REPLACEMENT PARTS) ⁽¹⁾

Size

Bearing inner Ø

Color coding

Replacement part additional index

Bearing shell wall thickness ⁽²⁾ in crankcase

Bearing shell wall thickness ⁽²⁾ in bearing cap

Standard

58.00

blue

2.255-2.260

Standard

58.00

yellow

2.260-2.265

Standard

58.00

red

2.265-2.270

Standard 1

58.00

white-blue

2.263-2.268

Standard 1

58.00

white-yellow

2.268-2.273

Standard 1

58.00

white-red

2.273-2.278

Rep. 1

57.75

blue

2.375-2.380

Rep. 1

57.75

gelb

2.380-2.385

Rep. 2

57.50

blue

2.500-2.505

Rep. 2

57.50

yellow

2.505-2.510

Rep. 3

57.25

blue

2.625-2.630

Rep. 3

57.25

yellow

2.630-2.635

Rep 4

57.00

blue

2.750-2.755

Rep. 4

57.00

yellow

2.755-2.760

⁽¹⁾

A parts set with the replacement part additional indices 52, 54 and 56 consists in each case of a bearing shell for the crankcase and a bearing shell for the bearing cap. Parts with the replacement part additional indices 57, 58 and 60 are supplied individually and should be used only for the bearing cap (without oil groove).

⁽²⁾	The thickest point measured in the middle of the bearing shell is the relevant thickness.

TEST DATA

Crankshaft bearing play	radial	0.030 - 0.045
Crankshaft bearing play	axial	0.100 - 0.250
Conrod bearing play	radial	0.020 - 0.050

TIGHTENING TORQUES IN NM OR TIGHTENING ANGLE

Bolts ⁽¹⁾ of crankshaft bearing caps

Tightening torque

Tightening angle

90°

⁽¹⁾	Re-use bolts up to a bolt length of max. 63.8 mm.

Special tools

Fig 4: Identifying Special Tools (001 589 72 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 5: Identifying Special Tools (001 589 53 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 6: Identifying Special Tools (363 589 02 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

COMMERCIALLY AVAILABLE TOOLS

Quick-calipers for internal measurements

Ø 20 -40 mm

Ø 40 -60 mm

Ø 60 -80 mm

Micrometer

0 - 25 mm

50 - 75 mm