11 44 000 Removing and installing, sealing or replacing oil-water heat exchanger (S62)

To avoid damage to the engine due to coolant admixture, it is necessary to drain and change the engine oil after completing the work.

Remove and install intake air manifold, refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S62) .

Open drain plug on radiator. Open coolant drain plug on right of engine block. Drain off coolant and dispose of correctly.

Top up coolant. Vent cooling system and check for leaks. Refer to 17 00 005 DRAINING AND ADDING COOLANT (S62) .

Remove and install fan cowl, refer to 17 11 031 REPLACING FAN COWL (S62) .

Release hose clamps (1) on left and right water hoses.

Disconnect left and right water hoses (2).

Fig 1: Disconnecting Water Hoses

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Disconnect plug connection (1) on coolant temperature sensor.

Fig 2: Disconnecting Plug Connection On Coolant Temperature Sensor

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Release screws (2). Remove connecting piece (3).

Release screws (1).

Remove thermostat housing (2).

Fig 3: Removing Thermostat Housing

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Installation: 

Replace O-rings (1) on connecting pipes.

Fig 4: Installing O-Rings

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Remove left and right injection pipes, fold back and lay to one side.

Installation instructions are contained in Removing and installing left and right injection pipes, refer to 13 53 240 REPLACING COMPLETE INJECTION PIPE (S62) .

Remove and install idle speed control valve, refer to 13 41 500 REPLACING IDLE SPEED CONTROL VALVE (S62) .

Unclip plug connections (1) and (2).

Release screws (3).

Remove retaining bracket (4).

Fig 5: Removing Retaining Bracket

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Release hose clamps (1) and detach molded hose.

Fig 6: Detaching Molded Hose From T-Piece

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Detach molded hose (2) from T-piece (3) at bottom.

Release all screws and have screws of control valve connected.

Fig 7: Releasing Screws

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Raise oil-water heat exchanger a little.

Remove control valve (1).

Fig 8: Removing Control Valve

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Installation: 

Insert control valve with screws in openings on oil-water heat exchanger.

Tilt up oil-water heat exchanger (1) at rear and remove towards top.

Fig 9: Removing Oil-Water Heat Exchanger

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Installation: 

Clean sealing surfaces on heat exchanger.

Replace O-rings (1).

Fig 10: Installing O-Rings

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Installation: 

Clean sealing surfaces.

Replace O-ring (1).

Fig 11: Installing O-Ring

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Drain and change the engine oil after completing work.

Assemble vehicle and set in horizontal position. Start engine and run at idle speed until oil indicator lamp goes out.

Switch off engine. Wait approx. 10 minutes. Check engine oil level. If necessary, correct engine oil level.