Remove/install left cylinder head - AR01.30-P-5770GZA (ML350, ML550, GL450, GL550)
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.
ENGINES 272, 273 in MODEL 164, 251
| Remove/install | |||
|---|---|---|---|
| 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 | |
| Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | ||
| 1 | Turn key in ignition lock to position "0" | ||
| 2 | Detach LH catalytic converter from exhaust manifold | AR49.10-P-7100GZA | |
| 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 | |
| 3 | Drain coolant | Drain coolant on radiator and crankcase. | AR20.00-P-1142GZC |
| Notes on coolant | AH20.00-N-2080-01A | ||
| 4 | Remove air filter housing (3) with engine intake air ducts (1) | AR09.10-P-1150GZA | |
| 5 | Remove ME-SFI [ME] control unit (N3/10) | AR07.08-P-7008GZA | |
| 6 | Remove hot film mass air flow sensor (B2/5) | AR07.07-P-1453GZA | |
| 7 | Remove air duct housing (4) | AR09.20-P-0080GZA | |
| 8 | Remove purge control valve purge line (5) (Y58/1) from crankcase ventilation system vacuum line (6) | ||
| 9 | Disconnect brake booster (7) vacuum line at resonance intake manifold (11) | ||
| 10 | Disconnect engine wiring harness | AR01.00-P-2410GZA | |
| 11 | Disconnect electrical connector at coolant temperature sensor (B11/4) | ||
| Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel | No fire, sparks, open flames or smoking. Pour fuels only into suitable and appropriately marked containers. Wear protective clothing when handling fuel. | AS47.00-Z-0001-01A | |
| 12 | Release fuel pressure over service valve (8) | AR07.03-P-1460-01GZ | |
| *BA07.03-P-1004-01B | |||
| Fig 8 | |||
| 13 | Unscrew fuel feed line (9) on fuel distributor (10) | Collect feathering-out fuel and seal connections. | |
| *BA07.03-P-1001-01B | |||
| Fig 9 | |||
| 14 | Remove resonance intake manifold (11) | AR09.20-P-1961GZA | |
| *BA09.20-P-1001-01N | |||
| 15 | Extract leak oil from power steering expansion reservoir (12) | Installation: Fill power steering pump and bleed it. | |
| Fig 10 | |||
| 16 | Remove return line on power steering (12) expansion reservoir | Installation: Replace hose clamp. | |
| 17 | Remove power steering expansion reservoir (12) | AR46.25-P-1000GZA | |
| 18 | Remove poly-V belt (13), poly-V belt tensioning device and guide pulley | AR13.20-P-0001GZA | |
| 19 | Remove oil filter housing (17) with oil-water heat exchanger | AR18.20-P-3471GZA | |
| 20 | Remove aspirator shutoff valve (18) and intermediate flange (18a) at left cylinder head (19) | AR14.30-P-7200GZA | |
| 21 | Detach coolant hose (14) from heat exchanger connection (15) | ||
| 22 | Disconnect coolant line (16) on coolant temperature control housing | ||
| 23 | Remove coolant temperature control housing | Installation: Install new O-ring and seal. | AR20.10-P-2460GZA |
| 24 | Remove front cover (20) | Installation: After fitting front cover (20), check that camshafts are positioned at 55° crank angle before top dead center (TDC): ↓ | AR01.30-P-5700GZA |
| Check basic position of camshafts. | AR05.20-P-6010GZA | ||
| 25 | Remove oil separator (21) | AR01.20-P-9750GZA | |
| 26 | Remove ignition coils at left cylinder head (19) | AR15.12-P-2003GZA | |
| 27 | Remove cylinder head cover (22) | AR01.20-P-5013GZA | |
| 28 | Rotate engine at crankshaft center bolt in direction of rotation of the engine to a 40° crankshaft angle after top dead center (TDC) | Pay attention to position of camshafts. | AR05.20-P-6010-01VB |
| Fig 4 | |||
| 29 | Remove alternator | AR15.40-P-5032GZA | |
| 30 | Remove chain tensioner | Chain tensioner with thread M24 1.5 (only for engine 272) | AR05.10-P-7800GZA |
| Chain tensioner with thread M22 1.5 In case of engine 272, both chain tensioners can be removed whereby for engine 273 only chain tensioner with thread M22 1.5 is installed. Installation: Install new chain tensioner with thread of M22 1.5. The previously installed chain tensioner must not be reinstalled because during removal, its pressure pin is pressed into the end position. The thrust pin latch prevents this return stroke. This would overstretch the timing chain on reinstalling. |
AR05.10-P-7800GZG | ||
| 31 | Remove both camshaft adjusters (23) | Adjuster for exhaust camshafts | AR05.20-P-7201GZA |
| Adjuster for intake camshafts | AR05.20-P-7201GZC | ||
| 32 | Pull out slide rail pins (24) from left cylinder head (19) | Installation: Apply sealant to the slide rail pins (24) before inserting them. | AR01.30-P-5800-04V |
| Fig 5 | |||
| Fig 6 | |||
| Fig 7 | |||
| Loctite 5970 sealant | *BR00.45-Z-1013-01A | ||
| 33 | Loosen cylinder head bolts in stages In the reverse order of tightening specification and remove them. | To avoid stresses in cylinder head (19), cylinder head bolts must be loosened only when the engine has cooled off: ↓ Tightening specification for cylinder head bolts |
|
| Engine 272 | AR01.30-P-5800-07VA | ||
| Engine 273 | AR01.30-P-5800-07SX | ||
| *BA01.30-P-1003-01O | |||
| *BA01.30-P-1016-01O | |||
| 34 | Remove cylinder head (19) from crankcase (19a) | Installation: Place new cylinder head gasket (19b) on crankcase (19a). Pay attention to fitted sleeves for fixing cylinder head (19). | |
| Information on applying sealant to cylinder head gasket | AH01.30-P-1000-04RX | ||
| 35 | Clean sealing surfaces at cylinder head (19), timing case cover and at cylinder crankcase (19a) | Do not use any sharp-edged tools or abrasive paper. The sealing surfaces will be damaged otherwise. Blow out tapped holes for cylinder head bolts in crankcase (19a) with compressed air, and clean off engine oil and coolant. |
AR01.00-P-0050-01A |
| Loctite 7200 | *BR00.45-Z-1038-04A | ||
| Loctite 7063 cleaning spray (150 ml) | *BR00.45-Z-1046-04A | ||
| 36 | Check cylinder head bolts | Installation: Replace if required. | AR01.30-P-5800-03VA |
| Cylinder head bolt | *BE01.30-P-1001-04B | ||
| 37 | Check sealing surfaces on cylinder head (19), timing case cover and cylinder crankcase (19a) for cracks and unevenness | Cylinder head (19) and cylinder crankcase (19a) must not be reworked surface grinding). The permissible machining tolerances will be exceeded otherwise. In the event of a complaint, replace cylinder head (19), timing case cover or cylinder crankcase (19a). Any distortion of the cylinder head (19) occurring in the longitudinal or transverse direction will be balanced out again during reassembly through tightening of the cylinder head bolts. |
|
| 38 | Install in the reverse order | ||
| 39 | Change engine oil and oil filter element | *BA01.45-P-1001-01M | |
| *BF18.00-P-1001-01M | |||
| 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. | AS00.00-Z-0005-01A | |
| 40 | Carry out an engine test run, and check engine and fuel system for leaks | ||
| 41 | Inspecting cooling system for leaks | AR20.00-P-1010GZC | |
| 42 | Perform basic programming | ||
| 43 | Read out fault memory using STAR DIAGNOSIS diagnostic system. Erase fault memory if necessary | Faults which may have been caused by disconnecting wires or by a simulation must be erased in the fault memory after completing the work. |
CYLINDER HEAD/CYLINDER HEAD BOLTS
| Number | Designation | Engine 272 | Engine 273 | ||
|---|---|---|---|---|---|
| BE01.30-P-1001-04B | Cylinder head bolt | Thread diameter | M | 11 | 11 |
| Length (L) when new | mm | 170 | 170 | ||
| Length (L) | mm | 172 | 172 | ||
| See picture in | - | - | |||
CYLINDER HEAD
| Number | Designation | Engine 272 | Engine 273 | |||||
|---|---|---|---|---|---|---|---|---|
| BA01.30-P-1003-01O | Cylinder head bolt to timing case | M8 | Nm | 20 | 20 | |||
| BA01.30-P-1016-01O | Bolt, cylinder head to crankcase | M11 | Stage 1 | Nm | 20 | 20 | ||
| Stage 2 | Nm | 50 | 50 | |||||
| Stage 3 | ∠° | 90 | 90 | |||||
| Stage 4 | ∠ ° | 90 | 90 | |||||
INJECTORS, INJECTION VALVES, LINES
| Number | Designation | Engine 272 | Engine 273 | ||||
|---|---|---|---|---|---|---|---|
| BA07.03-P-1001-01B | Union nut, fuel feed line to fuel distributor | Nm | 20 | 20 | |||
| BA07.03-P-1004-01B | Protective cap on service valve | Plastic | Nm | 2 | - | ||
| Metal | Nm | 15 | - | ||||
OIL PAN
| Number | Designation | Engine 272 | Engine 273 | |
|---|---|---|---|---|
| BA01.45-P-1001-01M | Oil drain screw to oil pan | Nm | 30 | 30 |
OIL PAN
| Number | Designation | Engine 272 | Engine 273 | |
|---|---|---|---|---|
| BA09.20-P-1001-01N | Bolt, resonance intake manifold to cylinder head | Nm | 9 | 9 |
ENGINE LUBRICATION
| Number | Designation | Engine 272.920/921/922/ 923/940/941/942/ 943/944/945/946/ 947/949/951/952/ 960/961/963/964/ 965/966/967/968/ 969/970/972/973/ 974/980/982/983/ 984/985/988 (Shortened maintenance interval) | Engine 272.920/921/922/ 923/940/941/942/ 943/944/945/946/ 947/949/951/952/ 960/961/963/964/ 965/966/967/968/ 969/970/972/973/ 974/980/982/983/ 984/985/988 (Maximum maintenance interval) | ||
|---|---|---|---|---|---|
| BF18.00-P-1001-01M | Engine oil | Filling capacity with oil filter | Liters | 8.0 | 8.0 |
| Specifications for service products | Sheet | BB00.40-P-0229-03A | - | ||
| Sheet | BB00.40-P-0229-05A | BB00.40-P-0229-05A | |||
ENGINE LUBRICATION
| Number | Designation | Engine 273.923/963 (Shortened maintenance interval) | Engine 273.923/963 (Maximum maintenance interval) | ||
|---|---|---|---|---|---|
| BF18.00-P-1001-01M | Engine oil | Filling capacity with oil filter | Liters | 9 | 9 |
| Specifications for service products | Sheet | BB00.40-P-0229-01A | - | ||
| Sheet | BB00.40-P-0229-03A | - | |||
| Sheet | BB00.40-P-0229-05A | BB00.40-P-0229-05A | |||
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1013-01A | Sealant | A 003 989 98 20 |
| BR00.45-Z-1038-04A | Loctite 7200 | Henkel Loctite Deutschland GmbH Arabellastrasse 17 81925 Munchen Germany Tel. +49 899268-0 Fax + 49 899101978 www.Loctite.de |
| BR00.45-Z-1046-04A | Loctite 7063 cleaning spray (150 ml) | A 001 986 71 71 10 |