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Home >> Volvo >> 2008 >> V70 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Differential Electronic Module (DEM), Driver Information Module (Dim), Engine And Engine Control Module (ECM) - Design And Function >> Engine (B6304T2; 2008-2009) >> Design And Function >> Lubrication System
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Lubrication System

Fig 1: Identifying Lubrication System
GLL156952Courtesy of VOLVO CARS CORPORATION
Number  Designation  Number  Designation 
1 Oil pan 5 Oil dipstick
2 Oil pump 6 Housing for the oil filter
3 Oil pressure line 7 Supply to the vibration damper's cooling nozzle.
4 Oil cooler 8 Oil suction line

The task of the lubrication system is to build-up a protective film of oil between the moving parts of the engine. The lubrication system must also transport dirt particles away from the moving parts and cool hot engine parts.

This is carried out by the oil pump supplying oil to the oil filter through an oil pressure line of treated steel.

Clean oil is supplied to the oil cooler from the oil filter to the oil cooler. From there the oil is further distributed, through a duct system, out to the various engine functions.

A pressure sensitive valve controls the oil flow to the vibration damper's oil cooler pipe if necessary.

Oil pump 

Fig 2: Identifying Oil Pump
GLL156953Courtesy of VOLVO CARS CORPORATION

The oil pump is in the oil pan, mounted underneath the intermediate section. The oil pump has an integrated relief valve. The pump is directly driven by the sprocket on the rear end of the crankshaft.

The oil pump draws oil from a centrally located nozzle in the sump.

The pump increases the pressure of the oil for lubrication, cooling and hydraulic functions.

Oil filter module 

Fig 3: Identifying Oil Filter Module
GLL156954Courtesy of VOLVO CARS CORPORATION

The oil filter module consists of an oil filter reservoir and an oil cooler. It is mounted on the intermediate section. The oil filter module is element based and can be taken apart.

The oil cooler is connected to the coolant system. Coolant is led through the oil cooler.