Remove/install coolant pump - AR20.10-P-1271GZ: Notes

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ENGINE 113.964 in MODEL 164.175

Fig 1: Identifying Coolant Pump Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Poly-V Belt And Alternator

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
	Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof.	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
	Risk of death caused by vehicle slipping or toppling off the lifting platform.	Align vehicle between columns of lifting platform and position four support plates at lifting platform support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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
1	Switch ignition off, remove ignition key (transmitter key)	On vehicles with Keyless Go, code 889: Press Keyless Go start/stop button repeatedly until ignition is switched off. Remove the Keyless Go transmitter card or transmitter key from vehicle and store beyond reach of the transmitter (at least 2 m).
2	Open engine hood		AR88.40-P-1000GZ
3	Unclip cover on engine firewall side		AR01.10-P-2405GZ
4	Raise vehicle with lifting platform		AR00.60-P-1000GZ
5	Remove bottom engine compartment paneling		AR61.20-P-1105GZ
6	Drain coolant at radiator		AR20.00-P-1142GZ
	Notes on coolant	All engines	AH20.00-N-2080-01A
	Coolant specifications	Sheet 310.1	BB00.40-P-0310-01A
	Anticorrosion/antifreeze agents (Sheet 325.0)	Sheet 325.0	BB00.40-P-0325-00A
		Coolant	*BF20.00-P-1001-02K
		Test cap	Fig 5
		Cooler vacuum filling device	Fig 6
7	Detach bracket (1)	Place to the side with lines still connected.
8	Remove coolant temperature sensor (B11/4)	Use a screwdriver to press out retaining clamp (11). Installation: Replace O-ring.
9	Slacken bolts (2) of belt pulley (3)		*BA20.10-P-1002-01C
10	Remove poly-V belt		AR13.22-P-1202GZ
11	Detach belt pulley (3) from coolant pump (4)	Installation: Screw in screws (2) only by hand, do not tighten.
12	Detach guide pulley (6) for coolant pump (4)	Pry off the cover (6a) using a screwdriver and undo the screw (4h).
			*BA20.10-P-1008-01C
13	Dismount coolant hose (7, 8) from coolant pump (4)	Inspect condition of coolant hoses and hose clamps, replace if necessary. 6 mm socket hexagon on flexible shaft for hose clamps with worm drive 7 mm socket hexagon on flexible shaft for hose clamps with worm drive
14	Disconnect coolant hose (9) from oil/water heat exchanger	Inspect condition of coolant hose and hose clamp, replace if necessary.
		Hose clamp pliers	Fig 3
15	Unscrew bolt (12) for alternator (G2).		*BA15.40-P-1003-01N
			*BA15.40-P-1005-01N
16	Unscrew bolt (13) for alternator (G2).	Place alternator to the side with lines connected.
			*BA15.40-P-1003-01N
			*BA15.40-P-1005-01N
17	Detach and remove coolant pump (4) from timing case cover	Installation: Replace gasket (4a).
		Installation: Observe bolt diagram.	AR20.10-P-1271-03GZ
			*BA20.10-P-1001-01C
18	Install in the reverse order
19	Inspecting cooling system for leaks		AR20.00-P-1010GZ
		Pressure pump	Fig 4
		Tester cap	Fig 5
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.
20	Conduct engine test run and check the engine for leaks	In the event of oil loss determine and eliminate cause, otherwise malfunctions, transmission damage, and serious environmental pollution may occur.

COOLANT PUMP, COOLANT THERMOSTAT

Number	Designation				Engine 113.964/971
BA20.10-P-1001-01C	Self-tapping screw connecting coolant pump to timing case	Thread not pretapped	M6	Nm	14
		Thread not pretapped	M8	Nm	35
		Thread pre-tapped	M6	Nm	10
		Thread pre-tapped	M8	Nm	25
BA20.10-P-1002-01C	Belt pulley on coolant pump			Nm	10
BA20.10-P-1003-01C	Bolt, coolant thermostat housing		M6	Nm	10
BA20.10-P-1008-01C	Bolt, guide pulley to coolant pump housing		M8	Nm	20

ALTERNATOR

Number	Designation			Engine 113 in model 164, 251
BA15.40-P-1003-01N	Alternator mounting screw		Nm	42
BA15.40-P-1005-01N	Self-tapping screw, alternator to timing case	Thread not pretapped	Nm	60
BA15.40-P-1005-01N	Self-tapping screw, alternator to timing case	Thread pre-tapped	Nm	45

COOLING SYSTEM

Number	Designation			Engine 113.964 in model 164
BF20.00-P-1001-02K	Cooling system	Total filling capacity	Liters	≈10.00
		Capacity of anticorrosion/antifreeze agent down to -37°C	Liters	≈5.00
		Filling capacity of anticorrosion/antifreeze down to -45°C	Liters	≈5.5
		Specifications for Operating Fluids	Sheet	BB00.40-P-0310-01A
		Specifications for Operating Fluids	Sheet	BB00.40-P-0325-00A

Fig 3: Identifying Hose Clamp Pliers (003 589 03 37 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 5: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 6: Identifying Vacuum-Type Cooling System Filler (285 589 00 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.