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Dismantling, check and assemblage of the crankshaft
Dismantling Remove the timing belt, oil pump housing, flywheel, the cylinder head assembly and the sump. 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 of the crankshaft. Remove the crankshaft bearing caps of the crankshaft and remove the crankshaft. Remove the rotor crankshaft position sensor.
NOTE For ease of installation, place 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. |
Check Check indigenous and crank pins for damage (burrs and clamps), excessive wear and cracks. Also, check out the hole in the oil channels clogging. Repair or replace the faulty part. Check taper and roundness of indigenous and crankpins of the crankshaft. Nominal value: radical neck diameter - 50 mm; crankpin diameter - 45 mm; taper and roundness of indigenous and crankpins - 0.005 mm or less.
Check loose leaves of radical bearings and rod Visually check the condition of the surface of each liner (peel, uneven contact, risks and bully others.). Replace defective ear.
Measuring bearing clearance 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). 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 and the thickness of the shaft journal bearing). The gap in the connecting rod bearings: 0,018-0,036 mm. Main bearing clearance: ?�� 1, 2, 4, 5 - 0,022-0,040 mm, ?��3 - 0,028-0,046 mm.
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 rotor crankshaft position sensor Remove the rotor crankshaft position sensor. Check the rotor crankshaft position sensor for damage, cracks and wear. If necessary, replace the sensor rotor.
| Fig. 2.67. Check the clearance between the rotor teeth and the tip of the sensor probe with depth gauge
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Check the clearance between the rotor teeth and the tip of the sensor probe with depth gauge (Fig. 2.67). The nominal value of the gap between the rotor teeth and the tip of the sensor probe: 0.5-1.1 mm.
NOTE Measure the distance from the top of the rotor tooth crankshaft position sensor to a mounting surface for a sensor on the engine block. |
Measure the length of the tip of the crankshaft position sensor as the distance between the end of the probe tip and the seating surfaces of the sensor. Calculate the gap as the difference between these values.
Assembly Install the upper main bearing shells in the bed of the crankshaft in the cylinder block.
NOTE Be careful when installing the main bearing shells taken earlier when disassembling, arrange them according to the adjusting labels put before removal. |
Install the crankshaft. Apply engine oil to the crankshaft main journals. Install the lower liners and main bearing caps. Tighten caps specified torque as follows: cover the central bearing, bearing cover ?��2, bearing cover ?��4, cover the front bearing and the rear bearing cap. Tighten the bolts gradually in two or three steps, then tighten the nominal torque.
| Fig. 2.68. Install the crankshaft bearing caps
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When replacing the cover must be placed so that the arrow covers were sent to the crankshaft pulley and the numbers correspond to the number of covers of cylinders (Fig. 2.68). Tightening torque of bolts of main bearing caps: 55-60 Nm, the connecting rod cap bolts: 32-35 Nm. Recheck that the crankshaft rotates smoothly and axial clearance of the crankshaft (the gap between the thrust flange of the central main bearing and the corresponding cheek of the crankshaft) corresponds to the nominal value. Nominal value: axial clearance of the crankshaft - 0,050-0,175 mm.
| Fig. 2.69. 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 2.69. Be careful to properly position the mandrel to prevent damage and deformation of the gland during installation. Replace the back plate cylinder and tighten bolts of its fastening. Install the connecting rod cap. Establish a flywheel, oil pump housing, oil pan and timing belt. Procedures for setting details are given in the relevant sections.
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