Downloaded from www.Manualslib.com manuals search engine 48
N62 Engine
Lubrication System
Crankcase with oil jets
The engine oil is supplied by the oil pump to the lubrication points in the engine block and
is pumped into the cylinder heads. The following components in the crankcase and cylin-
der head are supplied with engine oil:
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• Crankshaft bearings
• Oil jets for piston cooling
• Oil jet for the drive chain (bank 5-8)
• Tensioning rail for drive chain (bank 1-4)
Oil Check Valves
Three oil check valves are inserted into each cylinder head from the outside. This prevents
the engine oil from draining out of the cylinder head and the VANOS units.
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• Chain tensioner
• Guide rail on cylinder head
• Hydraulic valve adjustment elements (HVA)
• VANOS supply
• Camshaft bearings
• Overhead oil tubes for the valve gear
42-02-71 Crankcase with Oil Jets
1. Oil Jet for Drive Chain Cylinder Bank 5-8
2. Oil Jets for Piston Cooling
42-02-72
Oil Check Valves
1. Oil Check Valve for VANOS Intake
2. Oil Check Valve for VANOS Exhaust
3. Oil Check Valve for Cylinder Head Oil Supply
Downloaded from www.Manualslib.com manuals search engine 49
N62 Engine
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Oil Pressure Switch
The oil pressure switch is located on the side in the bank 1-4 cylinder head.
Oil Pump
The oil pump is mounted at an angle to the crankshaft bearing cap and is driven by the
crankshaft using a roller chain. The oil pump is a two-stage gear oil pump with two paral-
lel switched gear clusters.
The two pair of gear clusters are stacked one
behind the other and work in two stages.
Stage two (both pump supply circuits) is only
active in the lower engine speed range up to
approx. 2,000 rpm to provide sufficient oil pres-
sure for the VANOS at high oil temperatures.
Stage two is deactivated hydraulically at a pres-
sure of 2 bar.
42-02-73
42-02-75
42-02-76 Oil Pump
1. Drive Shaft
2. Mounting Points
3. Oil Filter
4. Pressure Relief Valve (over 15 Bar)
5. Control Valve (Pump Stage/Pressure Control)
6. Oil supply from the oil pump to the engine
7. Oil pressure control tube from the engine to
the control valve.
