Due to the different design of the oil filters, different oil coolers are used on the VR6 and 2.0L engines.
Engine 2.0L
Pic. 177. Details of the oil pump of the 2.0-liter engine: 1 - bolt, 25 Nm; 2 - base of the oil filter; 3 - sealing ring; 4 - oil cooler; 5 - nut, 25 Nm; 6 - oil filter
On a 2.0 liter engine, oil cooler 4 (pic. 177) is located between the base 2 of the oil filter and the oil filter 6. The oil cooler is removed only after removing the oil filter and disconnecting the hoses. To do this, unscrew nut 5 from the bottom surface of the oil cooler. O-ring 3 is installed between the oil cooler and the base. When assembling, tighten the nut to a torque of 25 Nm.
VR6 engine
Pic. 178. Location of the oil cooler on the side of the cylinder block of the VR6 engine: 1 - dipstick guide tube for checking the oil level; 2 - O-shaped sealing ring; 3 - cover, 25 Nm; 4 - oil cooler; 5 - O-ring
On the VR6 engine, the liquid-cooled oil cooler is mounted on the side of the cylinder block (pic. 178).
With liquid cooling, the oil cooler is enclosed in a housing through which the working fluid of the engine cooling system passes, and the temperature of the engine oil is reduced by the coolant. The coolant inlet and outlet hoses fit into the connection points on the filter.
The oil filter can be removed after the coolant has been drained from the cooling system and the coolant supply hoses have been disconnected. Then unscrew the cover from the outside of the oil filter and remove the radiator. There is an O-ring on each side of the oil cooler which should always be replaced if the oil cooler has been removed.
The liquid-cooled oil cooler provides not only oil cooling during heavy-duty operation, but also rapid oil warm-up when starting the engine.
Lubricate both O-rings with engine oil when installing the oil cooler. Install the radiator and tighten the cover with a torque of 25 Nm. Attach the hoses and fill the coolant into the cooling system.
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