Remove/install mixing chamber

AR09.20-P-1320TA

16.12.08

ENGINES 648.961 in MODEL 211.026 /226 except CODE (474) Particulate filter

P14.20-2131-06

1 Coolant hose

2 Coolant hose

3 Exhaust gas recirculation cooler

4 Angled piece

5 Bolts

Y27/9 Left exhaust gas recirculation positioner

P14.20-2115-12

6 Mixing chamber

7 Charge air pipe downstream of charge air cooler

8 Bracket

9 Gasket

B28 Pressure sensor

P14.20-2100-05

7 Charge air pipe downstream of charge air cooler

10 Charge air hose

11 Bolts

	Remove/install
Danger!	Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
1	Open engine hood		AR88.40-P-1000T
2	Remove cylinder head cover trim		AR01.20-P-5014-02C
		 Bolt, cylinder head cover trim to cylinder head	*BA01.20-P-1002-01G
		 Bolt, cover to charge air manifold	*BA01.20-P-1003-01G
3	Remove left exhaust gas recirculation positioner (Y27/9)		AR14.20-P-7662T
4	Remove angled piece (4)	Installation: USA version code 494a: secure ground line.
			*BA14.20-P-1007-01C
5	Remove bolts (5)		*BA14.20-P-1008-01C
6	Pull exhaust gas recirculation cooler (3) out of the mixing chamber (6)	 Do not detach coolant hoses (1, 2) from exhaust gas recirculation cooler.
		Installation: Clean sealing surfaces and replace gasket and sealing ring.
Danger!	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the lifting platform and position the four support plates at the lifting platform support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
7	Raise vehicle with vehicle lift
8	Remove bottom section of soundproofing		AR94.30-P-5300T
9	Remove bracket (8)	 Bolt, engine support to crankcase	*BA22.10-P-1001-02A
		 Bolt, support to mixing chamber	*BA09.41-P-1015-01A
10	Remove charge air hose (10) from charge air pipe downstream of charge air cooler (7)	 Check charge air hose and sealing ring for damage, replace if required.
11	Remove bolt (11)	 Bolt, charge air pipe to mixing chamber	*BA09.41-P-1019-01A
		 Bolt, charge air pipe to engine block	*BA09.41-P-1020-01A
12	Pull charge air pipe downstream of charge air cooler (7) out of the mixing chamber (6)	 The charge air pipe remains in the vehicle.
		Installation: Replace sealing ring.
13	Disconnect electrical connector at pressure sensor (B28)
14	Remove bolts of mixing chamber (6) at charge air manifold		*BA09.41-P-1011-01A
15	Take out mixing chamber (6)	Installation: Clean sealing surfaces and replace gasket (9).
16	Install in the reverse order

 Crankcase ventilation, cylinder head cover

Number	Designation		Engine 648


BA01.20-P-1002-01G	Bolt, cylinder head cover trim to cylinder head	Nm	9
BA01.20-P-1003-01G	Bolt, cover to charge air manifold.	Nm	9

Exhaust gas recirculation

Number	Designation		Engine 646 except 646.8 Engine 647, 648


BA14.20-P-1007-01C	Bolt, angle piece to exhaust gas recirculation cooler and charge air distribution pipe	Nm	9
BA14.20-P-1008-01C	Bolt, exhaust gas recirculation cooler to charge air manifold	Nm	21

Engine support (engine side)

Number	Designation			Engine 648


BA22.10-P-1001-02A	Bolt, engine support to cylinder crankcase	Stage 1	Nm	20
		Stage 2	°	-

Charge air pipe/charge air cooling

Number	Designation			Engine 648.960/ 961


BA09.41-P-1011-01A	Bolt, mixing chamber to charge air distribution line	M6	Nm	9
BA09.41-P-1015-01A	Bolt, support to mixing chamber	M6	Nm	20
BA09.41-P-1019-01A	Bolt, charge air pipe to mixing chamber		Nm	9
BA09.41-P-1020-01A	Bolt, charge air pipe to engine block		Nm	9

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