Tightening procedure for crankshaft bearing caps

AR03.20-G-4351-02MT

Tightening procedure for crankshaft bearing caps

 Caution

Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil

Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.

AS18.00-Z-0001-01A

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Engine

447.903 in model 000.001

Euro 2

Test and adjustment values for crankcase

Number

Designation

ENGINE 447.903

BE01.40-N-1007-02O

Main bearing cap bolt

Length of shank when new

mm

152,5...153,5

Permissible shank length

mm

156

 Crankcase, timing case cover, end cover

Number

Designation

Engine 447.903

BA01.40-N-1002-01R

Bolt, crankshaft bearing cap to crankcase

Stage 1

Nm

315

Stage 2

°

95

1

Slightly wet screws with engine oil.

2

Tighten screws with tightening torque to stage 1 in the numerical sequence   .

 Begin with the screw with item number 1.

3

Tighten screws with tightening angle to stage 2 in the in numerical sequence   .

 Begin with the screw with item number 1.

If the tightening torque is exceeded for a screw,



remove both screws of the crankshaft bearing cap or main fitted bearing cap again and check the shank lengths of the screws. Engine 447.903 in model 000.001Euro 2 

4

Tighten checked or new screws first with tightening torque to stage 1, then with tightening angle to stage 2.

Only if the tightening torque was exceeded for one screw.