Install the bearing shells in the block bed and the main bearing caps.
Place the crankshaft in the block supports, install the main bearing caps and check the crankshaft flange runout with an indicator, which should not exceed 0.015 mm.
Remove the center main bearing shells so that the crankshaft rests only on the outer main journals.
Use an indicator to check the runout of the middle main journal, which should not exceed 0.03 mm.
Check the axial clearance of the crankshaft using an indicator or a set of feeler gauges; it should be within 0.09–0.20 mm.
Measure the diameter of the main and connecting rod journals with a micrometer (see subsection "Design and technical characteristics"). Grind the crankshaft journals if their dimensions are outside the tolerances or if there are burrs or scratches on the journals.
[Material published on the website OpelBook.ru]
Select new main and connecting rod bearing shells of the appropriate repair size (see table in subsection "Design and technical characteristics"), as well as the corresponding connecting rod bearings.
Install the liners in the block bed and the crankshaft main bearing caps.
Place the crankshaft in the main bearings; its axial clearance is determined by the liners of the middle main bearing. Tighten the bolts securing the main bearing caps, having previously generously lubricated their threads with engine oil.
Adjust the position of the crankshaft by hitting its end several times with a rubber-faced hammer.
Tighten the center main bearing cap mounting bolts to a torque of 6.2 kgf·m.
To prevent oil leakage, thoroughly coat the mating inner surfaces of the front and rear main bearings with sealant and ensure that the top edge of the rear main bearing cap is in the same plane as the cylinder block.
Make sure that the crankshaft rotates freely, tighten the bolts securing the caps of the other main bearings to a torque of 6.2 kgf·m, and after tightening the bolts securing each cap, check whether the crankshaft rotates freely.
Warning: Do not scrape the bearing shells to ensure free rotation of the crankshaft.
Turn the crankshaft so that the connecting rod journals are in the BDC and TDC positions, and put the pistons and connecting rods back in place.
Visitor comments