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Remove/install oil-water heat exchanger - AR18.30-P-6840CD

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ENGINE 651 in MODEL 204, 207, 212, 218, 221 

Fig 1: Oil-Water Heat Exchanger Remove/Install Components (1 Of 2)
G09975231Courtesy of MERCEDES-BENZ USA
Fig 2: Oil-Water Heat Exchanger Remove/Install Components (2 Of 2)
G09975232Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from swallowing coolant. Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A
NOTES Notes on coolant   AH20.00-N-2080-01A
1 Remove cylinder head cover trim    
2 Drain coolant ENGINE 651 in MODEL 212.098/298 AR20.00-P-1142EH
ENGINE 651 in MODEL 204, 207 AR20.00-P-1142CW
ENGINE 651 in MODEL 212 (except 212.098/298), 218, 221
INSTALLATION NOTES
Do not pressure-test cooling system until engine has reached operating temperature. Leaks can occur on the cylinder head gasket otherwise.
AR20.00-P-1142OMA
3 Remove throttle valve actuator   AR09.41-P-1321CD
4 Unclip exhaust gas recirculation cooler bypass switchover valve (Y85) from bracket (8)    
5 Remove mounting plate (10) TORQUE SPECIFICATION Charge air manifold fastening plate bolt on engine support *BA09.41-P-1005-01N 
6 Remove power steering pump and place aside with hydraulic lines attached ENGINE 651 in MODEL 204Without electrohydraulic power steering (EHPS)  
ENGINE 651 in MODEL 207, 212 (except 212.098/298) AR46.30-P-0500EWI
ENGINE 651 in MODEL 204 without electrohydraulic power steering (EHPS) AR46.30-P-0500CO
7 Remove power steering pump and place aside with refrigerant lines attached ENGINE 651 in MODEL 204, 207, 212 (except 212.098/298), 218, 221  
ENGINE 651 in MODEL 204, 207, 212 (except 212.098/298), 218, 221 AR83.55-P-5300CD
8 Remove oil filter housing ENGINE 651.9 in MODEL 212.098/298 AR18.20-P-3471EH 
ENGINE 651 in MODEL 204, 207, 212 (except 212.098/298), 218, 221 AR18.20-P-3471CD 
9 Detach coolant hose (1) at oil-water heat exchanger (3) INSTALLATION IMPORTANT Check hose hose (1) and hose clamp for damage; replace if necessary.  
SPECIAL TOOL Hose clamp pliers Fig 3
10 Remove screw/bolts (2) INSTALLATION IMPORTANT Tighten screw/bolts (2) cross-wise.  
TORQUE SPECIFICATION Heat exchanger to oil filter base plate *BA18.20-P-1003-01W 
11 Remove oil-water heat exchanger (3) with the oil filter base plate INSTALLATION IMPORTANT Replace sealing rings (5).  
12 Install in the reverse order    
13 Connect STAR DIAGNOSIS, read out fault memory and erase if required    
REFER TO SELF-DIAGNOSTIC SYSTEMS AD00.00-P-2000-04A
INSPECT Check     
DANGER Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
14 Check for leaks with engine running
15 Check engine cooling system for leaktightness ENGINE 651 in MODEL 204, 207 AR20.00-P-1010CW
ENGINE 651 in MODEL 212, 218 AR20.00-P-1010OMA
ENGINE 651 in MODEL 221 AR20.00-P-1010SX
16 Check engine oil level, correct if necessary NOTES
The engine oil level must lie between "Min" and "Max".
Engine damage can occur otherwise.
 
CHARGE AIR PIPE/CHARGE AIR COOLING

Number Designation ENGINE 651
BA09.41-P-1005-01N Charge air manifold fastening plate bolt on engine support Nm 20
OIL FILTER

Number Designation ENGINE 651
BA18.20-P-1003-01W Heat exchanger to oil filter base plate M6 Nm 10
Fig 3: Identifying Hose Clamp Pliers (003 589 03 37 00)
G09975233Courtesy of MERCEDES-BENZ USA