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Main Bearing Installation

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Installing Main Bearing Upper Shell
GC0021210Courtesy of DAIMLERCHRYSLER CORP.
1 - LUBRICATION GROOVES
2 - OIL HOLES
  1. Install the main bearing shells with the lubrication groove in the cylinder block. See Fig 1.
  2. Make certain oil holes in block line up with oil holes in bearings. Bearing tabs must seat in the block tab slots.
    CAUTION: Do not get oil on the bedplate mating surface. It will may effect the sealer ability to seal the bedplate to cylinder block.
  3. Oil the bearings and journals and install crankshaft.
    CAUTION: Use only the specified anaerobic sealer on the bedplate or damage may occur to the engine. Ensure that both cylinder block and bedplate surfaces are clean.
  4. Apply 1.5 to 2.0 mm (0.059 to 0.078 in.) bead of anaerobic sealer Mopar® Bed Plate Sealant to cylinder block as shown in Fig 2.
    Fig 2: Main Bearing Caps/Bedplate Sealing
    GC0021211Courtesy of DAIMLERCHRYSLER CORP.
    Fig 3: Main Bearing Caps/Bedplate Tightening Sequence
    GC0021208Courtesy of DAIMLERCHRYSLER CORP.
  5. Install lower main bearings into main bearing cap/bedplate. Make certain the bearing tabs are seated into the bedplate slots.
  6. Position the main bearing/bedplate onto the engine block.
  7. Before installing bolts, lubricate the threads with clean engine oil, wipe off any excess oil.
  8. Install main bearing bedplate to engine block bolts 11, 17 and 20 finger tight. Tighten these bolts down together until the bedplate contacts the cylinder block.
  9. To ensure correct thrust bearing alignment, perform the following steps:
    1. Step 1: Rotate crankshaft until number 4 piston is at TDC.
    2. Step 2: Move crankshaft rearward to limits of travel.
    3. Step 3: Then, move crankshaft forward to limits of travel.
    4. Step 4: Wedge an appropriate tool between the rear of the cylinder block (NOT BED PLATE)  and the rear crankshaft counterweight. This will hold the crankshaft in it's furthest forward position.
    5. Step 5: Install and tighten bolts (1-10) in sequence shown in Fig 3 to 41 N.m (30 ft. lbs.).
    6. Step 6: Remove wedge tool used to hold crankshaft.
  10. Tighten bolts (1-10) again to 41 N.m (30 ft. lbs.) PLUS  1/4 turn in sequence shown in Fig 3.
  11. Install main bearing bedplate to engine block bolts (11-20), and torque each bolt to 28 N.m (20 ft. lbs.) in sequence shown in Fig 3.
  12. After the main bearing bedplate is installed, check the crankshaft turning torque. The turning torque should not exceed 5.6 N.m (50 in. lbs.).
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