Table of contents: Technical data ↓ Tightening torques* of main threaded… ↓
The cars are equipped with liquid-cooled V-shaped eight-cylinder diesel engines. The engines are located longitudinally in the engine compartment.
The engine cylinders are cast from grey cast iron as one piece with the cylinder block. The cylinder heads are made of light alloy and are bolted to the cylinder block. Steel valve guides are pressed into the cylinder head. A two-section oil pan is attached to the lower part of the engine cylinder block, into which the oil needed for lubrication and cooling of the engine flows.
The engines use a cross-flow design, where air enters the engine cylinders on one side and exhaust gases are expelled on the other side of the engine. Injectors deliver fuel directly to the engine cylinders.
Technical data
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Cylinder block
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Inner diameter of cylinder, mm:
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1st nominal
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78,306–78,310
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2nd nominal
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78,310–78,314
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1st enlarged
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78,346–78,350
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2nd enlarged
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78,350–78,354
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Pistons
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Piston diameter, mm:
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1st nominal
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78,253–78,261
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2nd nominal
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78,259–78,267
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1st enlarged
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78,293–78,301
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2nd enlarged
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78,299–78,307
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Crankshaft
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Axial clearance, mm:
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nominal
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0,090–0,251
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maximum permissible
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0,28
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Radial clearance, mm:
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nominal
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0,018–0,045
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maximum permissible
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0,1
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Main journal diameter, mm:
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1st
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64,968–64,948
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2nd, 3rd, 4th, 5th
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64,978–64,958
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Piston rings
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Piston ring gap, mm:
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upper compression
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0,20–0,35
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lower compression
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0,70–0,90
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oil scraper
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0,25–0,50
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Piston groove clearance, mm:
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compression ring
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0,045–0,085
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oil scraper ring
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0,025–0,065
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Connecting rods
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Radial clearance in connecting rod bearing, mm:
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nominal
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0,030–0,079
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maximum permissible
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0,12
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Cylinder head
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Deviation from flatness of the mating surface
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cylinder head surface, mm
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0,1
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Camshafts
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Axial clearance, mm:
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nominal
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0,06–0,15
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maximum permissible
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0,3
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Radial clearance, mm:
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nominal
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0,035–0,085
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maximum permissible
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0,1
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Valves
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Inlet/outlet, mm:
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plate diameter
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27,00–27,20/ 24,00–24,20
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rod diameter
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5,968– 5,982/ 5,958–5,972
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valve length
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98,95–99,28/ 98,95–99,25
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working chamfer angle
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45°–45°20'/ 45°–45°20'
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Tightening torques* of main threaded connections, Nm
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Turbocharger bracket
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22
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Bracket of mechanical valve of the EGR system
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22
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Intake exhaust pipe to turbocharger
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25
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Torque compensator support to long beam
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40
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Engine mounts
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40
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Heat shield for cardan shaft
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23
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Air Conditioning Compressor to Bracket
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22
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Pressure line to power steering pump
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50
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Cooling system hose clamps
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2
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Timing Belt Pulley to Camshaft
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75
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Eccentric roller to cylinder block
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45
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Vibration damper to crankshaft pulley
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22
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Threaded plug at the top of the oil pan
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35
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Oil filler plug to cylinder head
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10
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Exhaust gas recirculation valve connection pipe
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22
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Exhaust manifold
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10
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Air pipe to turbocharger
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10
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Main bearing cap mounting bolts:
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stage 1
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30
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stage 2
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50
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stage 3
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tighten the bolts to an angle of 90°
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Cylinder head cover to cylinder head
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10
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Injectors to the cylinder head
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10
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Fuel injection control unit (Rail element) to intake manifold
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30
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High pressure fuel lines
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30
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Middle pipe of the cooling system to the cylinder head
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10
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Crankcase ventilation pipe
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10
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High pressure fuel pump
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22
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Rear timing belt cover:
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M6
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10
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M8
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22
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Guide roller to cylinder block
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70
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Turbocharger
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20 Nm + tighten the bolts by 90°
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* For other threaded connections, the tightening torques are as follows, Nm: M6 – 10; M8 – 20; M10 – 45; M12 – 65.