Valvetrain, Assembly Overview
Valvetrain, Assembly Overview
1 Double bearing cap
• To install, seal joint surfaces of outer bearing cap with sealant (AMV 188 001 02) --> [ Lightly coat separation surfaces of front and
rear bearing caps with before
installing ] Service and Repair
2 5 Nm plus an additional 1/4 turn (90°)
• Replace
3 Support element
• Before installing, check axial play in camshafts --> [ Camshafts, Checking Axial Clearance ] Testing and Inspection
• Do not interchange
• With hydraulic valve clearance compensation
4 Exhaust camshaft
• Checking radial clearance using Plastigage, Wear limit: 0.1 mm
• Run-out: max. 0.01 mm
• Checking axial play --> [ Camshafts, Checking Axial Clearance ] Testing and Inspection
• Removing and installing --> [ Camshafts and Camshaft Adjusters ] Service and Repair
5 Intake camshaft bearing cap
• Removing and installing --> [ Camshafts and Camshaft Adjusters ] Service and Repair, Camshafts and camshaft adjusters, removing and installing
6 Exhaust camshaft bearing cap
• Removing and installing --> [ Camshafts and Camshaft Adjusters ] Service and Repair, Camshafts and camshaft adjusters, removing and installing
7 5 Nm plus an additional 1/4 turn (90°)
• Replace
8 Double bearing cap
9 Sealing cap
• Replace
• To remove, push through using screwdriver and pry out
• To install, press in using 3202
10 Bearing cap
To install, seal joint surfaces of outer bearing cap with sealant (AMV 188 001 02) --> [ Lightly coat separation surfaces of front and
rear bearing caps with before
installing ] Service and Repair
11 Roller rocker lever
• For exhaust camshaft
• Before installing, check axial play in camshafts --> [ Camshafts, Checking Axial Clearance ] Testing and Inspection
• Do not interchange
• Check roller for easy movement
• Lubricate contact surface
• Removing and installing --> [ Roller Rocker Lever ] Service and Repair
12 Camshaft roller chain
• Mark direction of rotation (installation position) before removing --> [ Camshafts and Camshaft Adjusters ] Service and Repair, Camshafts and camshaft adjusters, removing and installing
13 Roller rocker lever
• For intake camshaft
• Before installing, check camshaft axial clearance --> [ Camshafts, Checking Axial Clearance ] Testing and Inspection
• Do not interchange
• Check roller for easy movement
• Lubricate contact surface
• Removing and installing --> [ Roller Rocker Lever ] Service and Repair
14 Intake camshaft
• Checking radial clearance using Plastigage, Wear limit: 0.1 mm
• Run-out: max. 0.01 mm
• Checking axial play --> [ Camshafts, Checking Axial Clearance ] Testing and Inspection
• Removing and installing --> [ Camshafts and Camshaft Adjusters ] Service and Repair
15 5 Nm plus an additional 1/4 turn (90°)
• Replace
16 Camshaft adjuster
• Only rotate engine with camshaft adjuster installed
• Removing and installing --> [ Camshafts and Camshaft Adjusters ] Service and Repair, Camshafts and camshaft adjusters, removing and installing
17 Gasket
• Replace
18 Valve keepers
19 Valve spring plate
20 Valve spring
• Note installation position
• Removing and installing --> [ Valve Stem Seals ] Service and Repair, replacing valve stem oil seal
21 Valve stem seal
• Replacing --> [ Valve Stem Seals ] Service and Repair.
22 Gasket
• Replace
23 Cylinder head
• Check for distortion --> [ Checking cylinder head for distortion ] Cylinder Head, Assembly Overview
• Right cylinder head, removing and installing --> [ Right Cylinder Head ] Right Cylinder Head
• Left cylinder head, removing and installing --> [ Left Cylinder Head ] Left Cylinder Head
• After replacing replace entire amount of coolant
24 Exhaust valve
• Do not rework, only lapping is permitted
• Valve dimensions --> [ Valve dimensions ]
25 Intake valve
• Do not rework, only lapping is permitted
• Valve dimensions --> [ Valve dimensions ]
26 Seal
• For Camshaft Position (CMP) Sensor
• Removing and installing --> [ Camshaft Position Sensor Seals, Replacing ] Service and Repair
27 Cover for Camshaft Position (CMP) Sensor
• Note installation position
28 Washer
• Conical
29 23 Nm
30 Camshaft Position (CMP) sensor
31 10 Nm
32 Shaft
• For roller rocker lever, intake side
• Removing and installing --> [ Roller Rocker Lever ] Service and Repair, Roller rocker lever, removing and installing
33 10 Nm
34 10 Nm
35 Shaft
• For roller rocker lever, exhaust side
• Removing and installing --> [ Roller Rocker Lever ] Service and Repair, Roller rocker lever, removing and installing
36 55 Nm
37 Camshaft sprocket
• Removing and installing --> [ Toothed Belt, Removing, Installing and Tensioning ] Toothed Belt, Removing, Installing and Tensioning, Toothed belt, removing, installing and tensioning
38 Seal
• For camshaft
• Removing and installing --> [ Camshaft Seals, Replacing ] Service and Repair
39 O-ring
• Replace
Valve dimensions
• Valves must not be reworked. Only lapping is permitted.
Valve dimensions
• Worn sodium-filled exhaust valves must not be scrapped without first being properly treated.
CAUTION!
To prevent eye damage and skin abrasion, wear protective glasses and clothing!
- The valves must be cut at the middle of the shaft using a metal saw. While doing this, do not come into contact with water!
- Of the prepared valves, throw no more than 10 at a time into a bucket filled with water and then step away swiftly!
- A sudden chemical reaction occurs, during which sodium filling burns.
- The treated parts may then be discarded through conventional disposal channels.