Caravan L4-2.4L VIN B (2003)
Crankshaft Main Bearing: Service and Repair
CRANKSHAFT MAIN BEARINGS
Fig.53
The crankshaft is supported in five main bearings. All upper and lower bearing shells in the crankcase have oil grooves. Crankshaft end play is
controlled by a flanged bearing on the number three main bearing journal (Fig. 53).
Upper and lower Number 3 bearing halves are flanged to carry the crankshaft thrust loads and are NOT interchangeable with any other bearing halves
in the engine (Fig. 53). All bearing cap bolts removed during service procedures are to be cleaned and oiled before installation. Bearing shells are
available in standard and the following undersized: 0.025 mm (0.001 in.) and 0.250 mm (0.010 in.). Never install an undersize bearing that will
reduce clearance below specifications. Replace or machine the crankshaft as necessary to obtain proper bearing clearances.
MAIN BEARING INSTALLATION
Fig.54
1. Install the main bearing shells with the lubrication groove in the cylinder block (Fig. 54).
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 may effect the sealer ability to seal the bedplate to cylinder block.
3. Oil the bearings and journals and install crankshaft.
