Determine crankshaft bearing axial play - AR03.20-P-4291-03AV

Check values of crankshaft bearing clearance

Number	Designation			Engine 112 except 112.951/976, Engines 113.940/941/ 942/943/944/ 948/960/961/ 963/964/965/ 966/967/968/ 971/980/981/ 984/986	Engine 113.962/982
BE03.20-P-1001-04E	Main bearing play	radial when new	mm	0.026 to 0.050	0.026 to 0.050
BE03.20-P-1001-04E	Main bearing play	axial when new	mm	0.10 to 0.266	0.10 to 0.266
BE03.20-P-1002-04E	Connecting rod bearing play	radial when new	mm	0.022 to 0.067	0.022 to 0.067

Check values for crankshaft bearing clearance

Number	Designation			Engine 113.987/988/989 /990/991/993	Engine 113.992/995
BE03.20-P-1001-04E	Main bearing play	radial when new	mm	0.026 to 0.050	0.026 to 0.050
BE03.20-P-1001-04E	Main bearing play	axial when new	mm	0.10 to 0.266	0.10 to 0.266
BE03.20-P-1002-04E	Connecting rod bearing play	radial when new	mm	0.022 to 0.067	0.022 to 0.067

Assignment of thrust washers to crankshaft M 112,113
Crankcase	Fitted bearing base journal of crankshaft		Thrust washers		Axial play Crankshaft (mm)
Crankcase		Inscription	Designation	Marking	Axial play Crankshaft (mm)
No subdivision	N	0	N	Abbreviated reference number	0.10-0.266
No subdivision	N1	1	N1	Abbreviated reference number	0.10-0.266

Fig 1: Identifying Dial Indicator (001 589 32 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Dial Indicator Holder (363 589 02 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The thrust plates are assigned to the fitted bearing cap using the numbers 1 and 0 (arrow).

These are engraved on the journal of the crankshaft.

The fitted thrust plates must have the same identification and the oil grooves of the thrust plates must point to the crankshaft journals.

Fig 3: Identifying Thrust Plates Assigned To Fitted Bearing Cap

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Install dial indicator (2)with extension and dial indicator holder (1).
Press crankshaft with a screwdriver on one side up to support (arrow) and hold.
Set scale of dial gage (2) to zero.
Press crankshaft with a screwdriver on the other side up to support (arrow) and hold.
Read off the measured value on the dial indicator (2).
The measured value corresponds to the axial play of the crankshaft.

Fig 4: Identifying Dial Indicator With Extension And Dial Indicator Holder
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.