Remove/Install Cylinder Head - AR01.30-P-5800MFG

Engine 139 in model 118, 177, 247

Courtesy of MERCEDES-BENZ USA

	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
	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
	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
	Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-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
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on threaded connections with aluminum screws/bolts		AH00.00-P-0006-01RM
	General information on checking camshafts and bearing points of camshafts		AH05.20-P-1000-09SZ
	General information on checking valves, valve seats and valve guides		AH05.30-P-1000-02SZ
	Notes on application of flange sealants to seal major assemblies		AH00.00-P-0500-01MNE
	General information on work on gasoline direct injection system		AH07.00-P-2000-01A
	Remove
1	Drain off coolant.		AR20.00-P-1142MFG
2	Remove right front fender liner.		AR88.10-P-1301MFA
3	Remove charge air pipe downstream of exhaust gas turbocharger.		AR09.41-P-1333MFG
4	Remove front pre-fuse box.		AR54.15-P-1330MFA
5	Remove battery carrier.		AR54.10-P-0028MFA
6	Remove low-temperature circuit coolant expansion reservoir.		AR20.30-P-4951MFG
7	Remove charge-air distributor.		AR09.41-P-8683MFG
8	Remove exhaust manifold.		AR14.10-P-3006MFG
9	Remove camshafts.		AR05.20-P-6992MFG
10	Remove the chain tensioner.		AR05.10-P-7800MFG
11	Remove intermediate gear of engine timing and secure timing chain such that it cannot drop.		AR05.10-P-7620-02MFG
		Puller	Fig 3
		Holding device	Fig 2
12	Remove bearing pin (5).	Puller	Fig 1
13	Remove screw/bolts (3) and remove heat shield (4) from cylinder head (1).
14	Remove screws (10).
15	Remove bolts (2) in reverse order to tightening procedure.	Tightening procedure for cylinder head bolts	AR01.30-P-5800-01MFG
16	Remove cylinder head (1).	Do not drive in any tools between cylinder head (1) and crankcase (6) to remove. Sealing surfaces will otherwise be damaged.
17	Remove screw/bolts (7) and remove heat shield (8) from cylinder head (1).	When replacing the cylinder head (1).
	Check
18	Check cylinder head (1) for evenness and distortion.	Straightedge If distortion or unevenness is identified, ↓ install new cylinder head (1).	Fig 4
19	Check sealing surfaces for damage.	Check relevant sealing surfaces of engine for unevenness, score marks, etc. If unevenness, score marks, etc. are present: ↓ Replace affected component.
20	Check fitting sleeves (9) are correctly seated.	If problems are identified, ↓ replace fitting sleeves (9).
	Install
21	Attach heat shield (8) and screw in bolts (7).	When replacing the cylinder head (1). M6x1	*BA00.10-P-1002-04A
22	Install cylinder head (1).	Replace cylinder head gasket. Observe direction of installation for cylinder head gasket.
23	Screw in the screws (10).	Bolt, timing case cover to crankcase	*BA01.40-P-1001-01K
24	Screw in bolts (2) according to tightening procedure.	Tightening procedure for cylinder head bolts	AR01.30-P-5800-01MFG
		Observe tightening procedure. Replace screw/bolts (2). Screw/bolt, cylinder head to crankcase	*BA01.30-P-1001-01DA
25	Attach heat shield (4) to cylinder head (1) and screw in bolts (3).	M6x1	*BA00.10-P-1002-04A
26	Manually install bearing pin (5).	Replace bearing pin (5).
27	Remove timing chain attachment and install intermediate gear of engine timing.		AR05.10-P-7620-02MFG
		Drift	Fig 5
		Holding device	Fig 2
28	Install the chain tensioner.		AR05.10-P-7800MFG
29	Install camshafts.		AR05.20-P-6992MFG
30	Install exhaust manifold.		AR14.10-P-3006MFG
31	Install charge-air distributor.		AR09.41-P-8683MFG
32	Install low-temperature circuit coolant expansion reservoir.		AR20.30-P-4951MFG
33	Install battery carrier.		AR54.10-P-0028MFA
34	Install front pre-fuse box.		AR54.15-P-1330MFA
35	Install charge air pipe downstream of turbocharger.	Do not install upper engine cover until after the leak test.	AR09.41-P-1333MFG
36	Install right front fender liner.		AR88.10-P-1301MFA
37	Fill in coolant.	Only install lower engine compartment paneling after leak test.	AR20.00-P-1142MFG
38	Change engine oil and engine oil filter.	Engine 139 in model 118, 177, 247
		Engine 139 in model 118, 177	AP18.00-P-0101MFC
	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
39	Perform engine test run. While doing so, check engine for proper operation and leak tightness.
40	Install upper engine cover.
			AP01.10-P-2405-01K
41	Install lower engine compartment lining.		AR61.20-P-1105MFR