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Mount connecting rod bearing - AR03.10-P-6111-08SX

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ENGINE 273 

TEST SPECIFICATIONS FOR CRANKSHAFT BEARING CLEARANCE

Number Designation Engine 273
BE03.20-P-1002-04E Connecting rod bearing play Radial measurement new mm 0.022...0.066
CONNECTING ROD

Number Designation Engine 273
BA03.10-P-1001-01E Connecting rod bolt Stage 1 Nm 5
Stage 2 Nm 25
Stage 3 ∠° 90
Assignment of connecting rod bearing to connecting rod journal for engine 273
Upper half of connecting rod Lower half of connecting rod bearing cap Connecting rod bearing play (mm)
yellow yellow 0.022...0.066
blue red 0.022...0.066
red blue 0.022...0.066
  1. Clean bearing points on connecting rod, connecting rod bearing caps and connecting rod journals with a chamois leather.

    IMPORTANT Blow through oil ducts in direction of flow oil with compressed air. Never use hard objects for cleaning.

  2. The assignment of connecting rods to connecting rod bearing journals is indicated on the back of connecting rod bearing shells by a colored dot.

    IMPORTANT Only the assigned color combinations of the conrod bearing shells (see table) may be installed together. The sequence of the individual color combinations on the connecting rod bearing journals can be selected at random.

  3. Insert connecting rod bearing shells (1) into connecting rod and connecting rod bearing cap (2).

    NOTES The anti-twist locks (3) of the connecting rod bearing shells (1) must be located in the cutouts (4) of the connecting rod (2) and the connecting rod bearing cap.

    Fig 1: Connecting Rod Bearing Shells
    G10240580Courtesy of MERCEDES-BENZ USA
  4. Install connecting rod bearing cap with connecting rod bearing shells (1).
  5. Spread engine oil onto the thread and bolt head contact surface of the connecting rod bolts.
  6. Screw in connecting rod bolts and tighten to step  1.
  7. Tighten connecting rod bolts to step  2.
  8. Tighten connecting rod bolts using an angle wrench to Stage 3.

    IMPORTANT If no torquing angle wrench is available, the connecting rod 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.

    Fig 2: Tightening Connecting Rod Bolts Using Angle Wrench
    G10240581Courtesy of MERCEDES-BENZ USA