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Home >> Mercedes Benz >> 2019 >> S450 Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Air Intake, Turbocharging - 222 Chassis (1 Of 2) >> Testing & Repair >> Remove/Install Circulation Pump For Low-Temperature Circuit >> Remove/Install Circulation Pump For Low-Temperature Circuit - AR09.41-P-6926MNL

Remove/Install Circulation Pump For Low-Temperature Circuit - AR09.41-P-6926MNL

Engine 176 in model 217, 222 

Fig 1: Circulation Pump For Low-Temperature Circuit Components Location - Engine 176 In Model 222
G15362388Courtesy of MERCEDES-BENZ USA
WARNING 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 overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. AS20.00-Z-0001-01A
WARNING Risk of injury.  Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Notice  Notes on coolant   AH20.00-P-2080-01KOA
REMOVINGINSTALLING Remove/install     
1 Drain coolant from low-temperature circuit   AR09.41-P-6834MNL 
    IMPORTANT Only install upper engine cover and lower engine compartment paneling after the performing a leak test.  
2 Release and disconnect electrical connection (3) at low-temperature circuit circulation pump 1 (M43/6)    
3 Remove coolant hoses (1) at low-temperature circuit circulation pump 1 (M43/6)   AR20.20-P-7441-01RQ
4 Remove screw (2) from bracket TORQUE SPECIFICATION Nut/screw, low-temperature circuit pump/switchover valve retaining bracket to holder *BA20.10-P-1007-01ZA 
5 Remove low-temperature circuit circulation pump 1 (M43/6)    
6 Install in the reverse order    
WARNING 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
7 Perform an engine test run and check engine for proper operation and leaktightness    
8 Install lower engine compartment paneling   AR61.20-P-1105LF
9 Install upper engine cover    
COOLANT PUMP, COOLANT THERMOSTAT

Number Designation Engine 176
BA20.10-P-1007-01ZA Nut/screw, low-temperature circuit pump/switchover valve retaining bracket to holder Nm 8