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Dismantling, check and assemblage of the crankshaft
Dismantling Remove the timing belt front cover, flywheel, cylinder head and oil pan. Procedures for removing parts are given in the relevant sections. Remove the back plate of the cylinder block and crankshaft rear oil seal. Remove the covers of rods and rod bearing shells.
NOTE To properly follow the installation position the removed parts (covers of rods, inserts rods and main bearings) in the order corresponds to the number of cylinders and the orientation of the installation site. |
Remove the connecting bracket main bearing caps main bearing caps and crankshaft. Position the main bearing shells in the order corresponds to the number of cylinders.
Checking crankshaft Check indigenous and crank pins for damage (burrs and clamps), excessive wear and cracks. Clean the oil passages of the shaft. If necessary, repair or replace the crankshaft.
| Fig. 2.281. Check taper and roundness of indigenous and crankpins of the crankshaft
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Check taper and roundness of indigenous and crankpins of the crankshaft (Fig. 2.281). Nominal value. The diameter of the main journal: 61,982-62,000 mm. The diameter of the crank pin: 47,982-48,000 mm.
Inserts indigenous and connecting rod bearings Visually check the condition of the surface of each liner (peel frictional layer, uneven contact, risks and bully others.). Replace defective ear.
Measuring bearing clearance
| Fig. 2.282. Measurement of internal diameters of the holes for the crankshaft bearings
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Measure the diameter of the main and connecting rod crankshaft journals. Measure the diameters of holes for the main bearings of the crankshaft in the bed (in the cylinder block and bearing cap) and holes for connecting rod bearings (in the bottom head of a rod and a rod cover) (Fig. 2.282). Measure the thickness of the liner rod and main bearings. Calculate bearing clearance on the results of measurements (to subtract from the value of the internal diameter of the bearing bore the diameter of the shaft neck and two bearing thickness). Nominal value. Main bearing clearance: 0,004-0,022 mm. The gap in the connecting rod bearings: 0,018-0,036 mm. Marginal gap: 0.1 mm.
Measuring bearing clearance by plastic caliber
Determination of the clearance of the crankshaft main bearings by plastic caliber. Remove the shaft journals of oil, grease or other contaminants. Wash and dry the bearing shells. Cut the plastic gauge to pieces, equal to the width of the shaft journal. Place the gauges on the neck along the axis of the shaft (Do not put on the caliber of the oil supply hole). Install bearing shells, crankshaft and connecting bracket main bearing caps. Tighten the connecting bracket main bearing caps nominal torque. Do not rotate the crankshaft! Remove the connector bracket. Measure the maximum width of the crushed caliber using the scale on the envelope caliber. Determine bearing clearance. If necessary, repair or replace the crankshaft and bearing shells. When replacing the insert to fix the gap persists, pereshlifuyte neck shaft repair size with the appropriate replacement liners.
Checking the oil seal Check the front and rear crankshaft seals for damage or wear and tear of working edges. In the presence of defects replace the gland.
Plate drive automatic transmission Replace deformed or cracked plate.
Assembly
| Fig. 2.284. The upper and lower main bearing shells
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Install the upper main bearing shells in the bed of the crankshaft in the cylinder block (Fig. 2.284). Upper liners have oil distribution groove. Install the lower liners (without grooves) in the bed of the connecting arm of the crankshaft bearing caps. Apply engine oil to the crankshaft main journals. Install the crankshaft. Install the lower liners and main bearing caps to mark the front of the engine.
| Fig. 2.285. Order of a tightening of bolts of main bearing caps
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Tightening torque of bolts of main bearing cover: M7 (9-16) - 10-12 Nm M10 (1-8) - 14-16 Nm. Tighten the bolts gradually in four or five receptions, and then tighten the nominal torque.
| Fig. 2.286. Measuring the axial clearance of the crankshaft
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Check up freedom of rotation of the crankshaft and measure the axial clearance (Fig. 2.286). The axial clearance. Nominal value: 0,07-0,25 mm. Limit: 0.4 mm.
With the help of a mandrel (09231-33000) set the seal into its housing (Fig. 2.287).
Apply sealant to the stuffing box area shown in the figure (Fig. 2.288). Install the casing and the gland. Tightening torque bolts rear oil seal housing: 10-12 Nm. Replace the back plate cylinder and tighten bolts of its fastening. Tightening torque bolts back plate: 10-12 Nm.
| Fig. 2.289. Installation diagram plate torque converter
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Models with automatic transmission: Set the drive lever plate and the adapter plate (Fig. 2.289). Tightening torque plate bolts: 73-77 Nm.
| Fig. 2.290. The scheme of installation of a flywheel
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Models with manual transmission, install the flywheel. Tighten bolts to the specified torque (Fig. 2.290). Tightening torque plate bolts: 73-77 Nm.
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