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Crankshaft
Dismantling Remove the timing belt front cover, flywheel, cylinder head and oil pan. 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 crankshaft 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. 2.114. Driving measure 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. 2.114). The nominal value of the measured diameters below. The diameter of the main journal: 56,982-57,000 mm. The diameter of the crank pin: 44,980-45,000 mm. The taper and roundness of indigenous and crankpins: 0.01 mm or less.
Check loose leaves of radical bearings and rod 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. 2.115. Driving nutrometrom measure inside diameters of holes for the main bearings of the crankshaft in bed
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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 connecting rod bearings holes (at the bottom of the head and a rod cover). 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 thicknesses bearing) (Fig. 2.115). Main bearing clearance: Cervical ?��1,2,4,5 - 0,018-0,036 mm; Sheika number 3 - 0,024-0,042 mm. The gap in the connecting rod bearings: 0,015-0,048 mm. Marginal gap: 0.1 mm.
Measuring bearing clearance by plastic caliber Determination of the clearance in the crankshaft bearing plastic gauge method described below. 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) (Fig. 2.116). Install bearing shells, crankshaft and block crankshaft bearing caps. Tighten the unit covers regulated torque. Do not rotate the crankshaft. Remove the lids. Measure the maximum width of the caliber raspluschennoy 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.
Check seals crankshaft Check the front and rear crankshaft seals for damage or wear and tear of working edges. In the presence of defects replace the gland.
Check the bearing cap
| Fig. 2.117. Measuring the axial clearance of the crankshaft
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After installing the unit main bearing caps, ensure that the crankshaft rotates smoothly and axial clearance of the crankshaft corresponds to the nominal value. If the axial clearance exceeds the limit, replace persistent half rings of the bearing and / or the bearing (Fig. 2.117). Standard value: 0.05-0.25 mm.
Check plate lever drive Replace deformed or cracked plate.
Check the flywheel Check the flatness of the flywheel for the installation of the master clutch. If deep scratches or heavy wear replace a flywheel. Check flywheel runout. Limit runout: 0.13 mm. Check the condition of the teeth flywheel. If necessary, replace the crown.
Assembly Install the upper main bearing shells in the bed of the crankshaft in the cylinder block. Upper liners have oil distribution groove. Install the lower liners (without grooves) in the bed of the block main bearing caps.
Inserts central neck (with thrust bearing) oil distribution grooves are not (Fig. 2.118).
| Fig. 2.119. The experimental setup of the crankshaft
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Apply engine oil to the crankshaft main journals. Install the crankshaft (Fig. 2.119). Install the lower liners and block crankshaft bearing caps to mark the front of the engine. Tighten caps nominal torque. Tightening torque of bolts of main bearing cap: 25 Nm + 90 ?�. Tighten the bolts gradually in four or five receptions, and then tighten the nominal torque. Tighten bolts to 90 degrees. Check up freedom of rotation of the crankshaft and measure the axial clearance.
| Fig. 2.120. Installing the crankshaft rear oil seal
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With a special tool (Tool for fitting crankshaft rear oil seal 09231-2100) set the crankshaft rear oil seal in the stuffing box, as shown in Figure 2.120. Be careful to properly position the mandrel to prevent damage and deformation of the gland during installation.
| Fig. 2.121. Driving proper installation of the gland
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Place the stuffing box so that the hole (arrow in Figure 2.121) of the oil separator was sent down (to the sump). Place the stuffing box with a new gasket. Tighten the bolts. Tightening torque bolts packing box: 10-12 Nm. Models with manual transmission: Install the back plate of the cylinder block and tighten bolts of its fastening, install the flywheel. Tighten regulated torque. Tightening torque flywheel bolts: 130-140 Nm. Models with automatic transmission: replace the crankshaft hub and adapter plate, set the drive lever. Tighten regulated torque. Tightening torque automatic transmission mounting plate: 130-140 Nm.
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