Remove/Install Camshafts - AR05.20-P-6992MFG

Engine 139 in model 118, 177, 247

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

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. Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	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
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	General information on checking camshafts and bearing points of camshafts		AH05.20-P-1000-09SZ
	Remove
1	Disconnect ground line of on-board electrical system battery (G1).	Disconnect ground line of on-board electrical system battery (G1). Otherwise the CAMTRONIC will be damaged.	AR54.10-P-0003MFA
2	Remove cylinder head cover.		AR01.20-P-5014MFG
3	Remove fuel high-pressure pump.		AR07.02-P-1020MFG
4	Remove camshaft positioners.		AR05.20-P-7204MFG
5	Remove screws/bolts (3) and remove hold-down tools.
6	Remove holder for intake camshaft (1) and exhaust camshaft (2).		AR05.20-P-6020-03MFG
		Holding device	Fig 1
7	Check position of line cams (21).	Line cams (21) of exhaust camshaft (2) must be in position (A). Otherwise, exhaust camshaft (2) and cylinder head (5) will be damaged. If line cams (21) of exhaust camshaft (2) are in position (A), ↓ continue to follow the repair process. If line cams (21) of exhaust camshaft (2) are in position (B), ↓ continue to follow the repair process.
8	Remove intake camshaft (1) and exhaust camshaft (2).
	Check
9	Check intake camshaft (1) and exhaust camshaft (2) for damage and dimensional accuracy.	Commercially available devices/tools Outside micrometer Diameter of camshaft fitted bearing journal If there are problems, ↓ Replace intake camshaft (1) or exhaust camshaft (2).	*BE05.20-P-1002-03E
10	Check cylinder head (5) and compensating elements (6) for damage.	If damage is present, ↓ replace cylinder head (5) and compensating elements (6). Replace cylinder head.	AR01.30-P-5800MFG
		Replace compensating elements.	AR05.00-P-2011MFG
11	Insert calibrating tools (15, 16, 17) as shown on exhaust camshaft (2).	If exhaust camshaft (2) is reinstalled or line cams (21) are in position (B). Calibrating tools (15, 16, 17) must be completely flush. Otherwise, the component parts may be damaged in the course of the repair process. Only move actuator (19) if calibrating tools (15, 17) are in position. Assembly tool If calibrating tool (16) cannot be fitted, ↓ move actuators (19) in the direction of arrow (A) on exhaust camshaft (2) until actuators (19) touch calibrating tools (15, 17) and calibrating tool (16) can be inserted. Actuators (19) may not be moved too far. Otherwise, spring-loaded balls (20) will be ejected and exhaust camshaft (2) will need to be replaced.	Fig 2
	Install
12	Install intake camshaft (1) and exhaust camshaft (2).
	Specified engine oils (service) - Overview	Lubricate compensating elements (6) and camshaft bearing points.	BB00.40-P-0223-02A
13	Attach holder for intake camshaft (1) and exhaust camshaft (2).		AR05.20-P-6020-03MFG
		Holding device	Fig 1
14	Insert hold-down tool and screw in bolts (3).	Bolt for camshaft hold-down tool	*BA05.20-P-1001-02K
15	Install camshaft positioners.		AR05.20-P-7204MFG
16	Install fuel high-pressure pump.		AR07.02-P-1020MFG
17	Install cylinder head cover.	Only install upper engine cover after the leak test.	AR01.20-P-5014MFG
18	Attach ground line of the on-board electrical system battery (G1).		AR54.10-P-0003MFA
	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
19	Perform engine test run. While doing so, check engine for proper operation and leak tightness.
20	Install upper engine cover.
			AP01.10-P-2405-01K