Replacing coolant pipe · sm2020s0002b · Mercedes-Benz WIS

SM20.20-S-0002B

Replacing coolant pipe

7.7.98

ENGINE 601.970 in MODEL 638.074 /174 /274 ## as of 083367 up to 149548

S20.20-2008-01

1 Coolant pipe

2 Bracket on oil sump

3 Bolt

4 Bolt

5 Securing clamp

Operation no. of operation texts or standard texts and flat rates

Sector	Op. no.	Operation text
N	029032	WORKS: DISMOUNT + MOUNT COOLANT PIPES FROM THERMOSTAT HOUSING, RENEW ACCORDING TO FINDINGS ACCOUNTING CODE: 20 910 54
N	029033	WORKS: RENEW COOLANT THERMOSTAT HOUSING (COOLANT PIPE DISMOUNTED) ACCOUNTING CODE: 20 910 54
N	029044	WORKS: FIT BRACKET ON OIL SUMP ACCOUNTING CODE: 20 910 54

	Check whether coolant pipe (1) with reinforced bracket is already mounted
	If no,	up to VIN 083 366	SM20.20-S-0002A
	If yes, 
	Removing
1	Check for leaks between coolant pipe (1) and lid of coolant temperature regulator		AR20.20-S-7450A
	If no,  continue from step 2.2
	If yes, 
2.1	Dismount coolant pipe (1) Check gasket seat on coolant temperature regulator for shrinkage
	In the event of shrinkage, 
	Replace lid of coolant temperature regulator		AR20.10-S-2460B
2.2	Unscrew bolt connections on coolant pipe (1) and push coolant pipe (1) slightly to the right (in direction of travel)	 Coolant may escape.
			*BA20.20-N-1003-01B
			*BA20.20-N-1002-01B
3	Unscrew screws (3) of oil sump on motor crankcase
	Installing
4	Screw on bracket (2) with new bolts (3)		*BA01.45-N-1010-01H
5	Fit coolant pipe (1) with reinforced gasket ring	 Ensure stress-free installation	AR20.20-S-7450A
6	Fit additional securing clip (5) and screw on with bolt (4)		*BA20.20-N-1008-01B
7	Top up coolant
	Check coolant circulation for leaks

 Oil pan

Number	Designation			Engine 601.970


BA01.45-N-1010-01H	Oil sump bracket on cylinder crankcase	M8	Nm	20

 Radiator, coolant hoses, coolant pipes

Number	Designation		Engines 601.942/ 970


BA20.20-N-1002-01B	Coolant pipe on cylinder crankcase	Nm	9
BA20.20-N-1003-01B	Coolant pipe securing clip on bracket	Nm	9
BA20.20-N-1008-01B	Coolant pipe securing clip on oil sump bracket	Nm	23

Parts ordering notes

Part no.	Designation	Quantity
638 500 03 72	Coolant pipe	as required
638 997 07 45	Seal	as required
638 500 03 31	Bracket on oil sump	1
N 914 007 00 80 03	Bracket bolt on oil sump (M8x45)	2
N 304 017 00 80 24	Securing clip bolt (M8x25)	1
N 009 021 00 62 08	Washer	1
N 916 016 03 72 00	Securing clip on oil sump bracket	1
601 203 00 75	Coolant temperature regulator lid	as required