General information about the N62 engine firm «BMW» on the series «x5» with body «E53», since 2003, a gasoline 8-cylinder engine of the series «N62» displacement of 4.4 liters and 4.8 liters with a...
Cylinder block — design description The design of the cylinder block is shown in Figure 5.2. Table 5.2. Block parameters Engine N62B44 N62B48 Piston-cylinder clearance, mm - nominal 0,03 -...
Oil sump — design description The oil sump provides a connection between the cylinder block and the oil sump, increasing the structural rigidity of the cylinder block. Structural design of...
Cylinder head — design description The design of the cylinder head is shown in Figure 5.4. The cylinder head is cast from aluminum alloy. It has two valve drive camshafts on plain bearings,...
Cylinder head cover — design description The cylinder head cover is made of aluminum alloy and is additionally covered with ignition coil covers. Each cylinder head has its own cover with its own...
Valve seats — design description The N62 valve seats are pressed into the cylinder head with a camber angle of 39.5°. The valves are driven by camshaft cams through roller levers with...
Valves and springs — design description The valves are made of special, corrosion-resistant steel, chrome-plated, and are hardened rods that are located in the head of the block in a V-shape, at an...
Hydraulic compensators — design description Hydraulic expansion joints N62 are installed directly in the body of the cylinder head. The valves are driven by camshaft cams through hydraulic tappet...
Crankshaft and flywheel — design description The design of the crankshaft is shown in Figure 5.8. The crankshaft of the engine is five-bearing, cast from cast iron with nodular graphite. The supports are...
Crankshaft bearing shells Inserts of main and connecting rod bearings bimetallic three-layer. Radial clearance between the bearing shells and the main / connecting rod journals of the...
Drive Disc — Design Description The design of the automatic transmission drive disk is shown in Figure 5.9. with motor «N62», as standard, an automatic transmission with a drive disc is used....
Vibration Damper — Design Description The design of the torsional vibration damper is shown in Figure 5.8. Its marking color is black. Permissible axial and radial runout (ovality), - no more than...
Pistons and connecting rods — design description The design of the piston and connecting rod of the engine block is shown in Figure 5.10. Pistons are made of aluminum alloy with steel inserts. Each piston has...
Gas distribution mechanism — design description The design of the engine valve mechanism drive is shown in Figure 5.11. The engine uses a valve timing mechanism with intake and exhaust overhead camshafts,...
Removal and installation of the engine Attention! Detachment «–» conduct terminals from AB only with the ignition off. At the same time, the fault codes of the KSUD, the codes of the anti-theft...
Operation Recommendations Technology for performing work on checking compression, fuel supply pressure, oil pressure in the engine, checking the thermostat, generator and voltage...
Replacing the cylinder head seal The design of the engine cylinder heads is shown in Figure 5.4. Removing the seal of the head cover on the side of 5-8 cylinders Removing the head cover seal...
Replacing the cylinder head One of the most common reasons for removing the engine cylinder head is damage to the gasket between the head and the cylinder block. The signs of damage are:...
Checking the cylinder head for leaks Checking the engine cylinder head for leaks must be carried out in the following order. Prepare fixtures «11.9.430», «11.9.431», «11.9.432» And «11.9.433» to...
Replacing the lower part of the engine oil sump Replacing the lower part of the oil sump (pallet) engine must be carried out in the following order. Unscrew the oil filter cap, the oil will drain into the...
Replacing the upper part of the oil sump The design of the engine oil pan is shown in Figure 5.4. Note. There is very little room to work on the removal of the engine oil pan, so it is necessary to...
Replacing the upper timing covers The design of the upper covers of the timing is shown in Figure 5.66. Removal of the left upper timing cover of the engine on the side of cylinders 5–8 must be...
Replacing the lower timing cover The design of the lower timing cover is shown in Figure 5.69. Replacing the lower timing cover must be carried out in the following order. Prepare fixture...
Replacing the front crankshaft oil seal Replacing the front crankshaft oil seal must be carried out in the following order. Prepare fixtures «11.9.410» And «11.9.420» and remove the vibration damper...
Replacement of a back epiploon of a cranked shaft Replacing the crankshaft rear oil seal, from the automatic transmission side, must be carried out in the following order. Remove gearbox and drain oil from...
Crankshaft replacement Replacing the crankshaft of the engine must be carried out in the following order. Remove engine, remove cylinder head (side 1–4), cylinder head (side 5–8)....
Drive Disc/Flywheel Replacement Attention! The role of the engine flywheel on a power unit with automatic transmission is played by a drive disk, a compensating clutch and an automatic...
Vibration damper replacement Attention! When replacing the vibration damper, do not damage the radiator of the engine cooling system. The vibration damper must be replaced in the following...
Vibration damper hub replacement Removal of the hub of the vibration damper must be carried out in the following order. Prepare fixtures «11.9.454», «11.3.460», «11.9.451», «11.9.452» And...
Replacement of all pistons Attention! Pistons and piston pins are paired and cannot be dismantled. The crankshaft journal bearing cap is machined together with the connecting rod and...
Replacing piston rings Note. On rings that have been in use, the marking may not be visible. Place the removed rings in the sequence of numbering of cylinders and positions. Install...
Replacing the alternator drive belt The alternator drive poly V-belt is replaced under the following circumstances: when contaminated with coolant or oil; when there is a noise of slipping of the...
Replacing the A/C Compressor Drive Belt The V-ribbed belt for the air conditioning compressor drive is changed under the same circumstances as the alternator drive belt. Note. If the drive belt is to...
Replacing the springs of all valves The design of the valve mechanism is shown in Figure 5.11. Attention! Hydraulic compensators that have been in operation must only be installed in their...
Replacement of valve stem seals Replacement of valve stem seals should be carried out according to the technology similar to the engine «M54» taking into account the fact that the old fixture...
Replacing the left intake camshaft Note. The technology for removing and installing the intake camshaft has some differences. Removing the intake camshaft. Prepare fixtures «11.9.470»,...
Installing the intake camshaft Installation of the left inlet camshaft on the bank of cylinders 5-8 must be carried out starting from the 8th cylinder, in the following order. Clean all...
Replacing the right exhaust camshaft The technology for removing and installing the right exhaust camshaft is similar to the technology for the left exhaust camshaft described above. In doing so,...
Replacing the left exhaust camshaft Note. The technology for removing and installing the left exhaust camshaft is different. cook «checkout» for laying out parts to be removed by cylinder...
Replacing the right exhaust camshaft The technology for removing and installing the right exhaust camshaft is similar to the technology for the left exhaust camshaft described above. At the same...
Checking the valve timing of the left cylinder head Checking the valve timing of the left cylinder head, on the side of 5-8 cylinders, must be carried out in the following order. Prepare fixtures «11.9.190»,...
Adjusting the valve timing of the left cylinder head Adjusting the valve timing of the left head of the block on the side of 5–8 cylinders must be carried out in the following order. Prepare fixtures «11.9.190»,...
Replacement of solenoid valves Removing both left solenoid valves (EMC) on the side of cylinders 5-8 must be carried out in the following order. Read information from the fault memory of the...
Replacing the left eccentric shaft Attention! The eccentric shafts on the side of cylinders 1-4 and 5-8 of the engine manufactured from September 2003 are the same and differ in the location of...
Replacing the right eccentric shaft Replacing the right eccentric shaft on the side of cylinders 1-4 must be carried out in the same manner as for cylinders 5-8, if necessary. Remove the right...
Replacing eccentric shaft drive motors Replacing the left eccentric shaft drive motor on the side of cylinders 5-8 must be carried out in the following order. Remove the soundproof casing, the...
Replacing eccentric shaft sensors Removal of the sensor of the left eccentric shaft on the bank of cylinders 5-8 must be carried out in the following order. Remove the cover of the left...
Replacing Engine Mount Brackets Replacement of an arm of the left support of the engine is necessary for carrying out in a following order. Lock the engine in the installation position using...
Replacement of pillows of fastening of the engine Replacement of the right pillow of fastening of the engine is necessary for carrying out in a following order. Lock the engine in the installation position...