Installing and gauging connecting rod bearings - AR03.10-P-6111-06VT
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INSPECTION DATA FOR CRANKSHAFT BEARING CLEARANCE
| Number |
Designation |
Engine 113.987/988/98 9/990/991/993 |
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 |
| BE03.20-P-1002-04E |
Connecting rod bearing play |
radial when new |
mm |
0.022...0.067 |
0.022...0.067 |
CONNECTING ROD
| Number |
Designation |
Engine 113.989 |
Engine 112 except 112.951, Engines 113.940/941/942/ 943/944/945/946/ 948/960/961/962/ 963/964/965/966/ 967/968/971/980/ 981/982/984/986/ 987/988/990/991/ 992/993 |
| BA03.10-P-1001-01E |
Connecting rod bolt |
Stage 1 |
Nm |
5 |
5 |
| Stage 2 |
Nm |
25 |
25 |
| Stage 3 |
∠° |
90 |
90 |
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
- Clean the bearing points of conrod, conrod bearing caps and conrod bearing journals with a chamois leather.
Blow through oil galleries in direction of flow oil with compressed air. Do not use any hard objects for cleaning.
The assignment of the connecting rod bearings to the connecting rod journal is marked on the rear of the connecting rod bearing shell (7) by a color dot. Only assigned color combinations of the connecting rod bearing shell (7) may be installed with each other, yellow to yellow and red to blue. The sequence of the individual color combinations on the conrod bearing journals can be selected at random.
- Insert the connecting rod bearing shell (7) in the connecting rod (4) and in the connecting rod bearing cap.
The conrod bearing shell (7) with the oil drilling (arrow) must be installed in the conrod (4) otherwise the conrod bearings will not be lubricated.
The anti-twist lock (8) of the connecting rod bearing shell (7) must be located in the groove (9) of the connecting rod and of the connecting rod bearing cap.
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
- Install the connecting rod bearing cap with the connecting rod bearing shell (7).
- Lubricate thread and bolt head contact surface of conrod bolts with engine oil.
- Screw in conrod bolts and tighten to Stage 1
.
- Tighten conrod bolts to Stage 2
.
- Tighten conrod bolts using an angle wrench to Stage 3
.
If no torquing angle wrench is available, the conrod screws can be torqued further by the specified angle in a single operation using a wrench and tommy bar.
Do not use a flexi-rod torque wrench for tightening in order to avoid any angle errors.
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.