Camshaft Timing Chains, Assembly Overview
Camshaft Timing Chains, Assembly Overview
1 Control housing
• Lightly oil the contact surfaces of the camshaft and control housing seals before installing
• Removing and installing --> [ Camshafts ] Camshafts.
• Disassembling and assembling --> [ Disassembling and Assembling Control Housing ] Camshafts
• Check control housing strainer for soiling before installation --> [ Checking Strainer of Control Housing for Contamination ] Camshafts
2 8 Nm
• Replace
3 Camshaft roller chain
• Mark direction of rotation before removing (installation position) --> [ Roller Chain, Marking ]
• Installing --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
4 Exhaust camshaft adjuster
• Identification: 32A
• Only rotate engine with camshaft adjuster installed
• Installing --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
5 Intermediate shaft
6 Thrust washer
• Not installed on all engines
7 8 Nm
• Insert using locking fluid (D 000 600 A2)
8 Tensioning rail
• For camshaft roller chain --> [ (Item 3) Camshaft roller chain ]
9 Pivot pin, 18 Nm
• For tensioning track --> [ (Item 8) Tensioning rail ]
10 Chain tensioner, 40 Nm
• For camshaft roller chain --> [ (Item 3) Camshaft roller chain ]
• Only rotate engine with chain tensioner installed
11 Seal
• Replace if damaged or leaking
12 Chain sprocket
• For roller chain --> [ (Item 17) Roller chain ]
• Installing --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
13 Chain sprocket
• For camshaft roller chain --> [ (Item 3) Camshaft roller chain ]
• Installing --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
14 60 Nm + 1/4 turn (90°)
• Replace
• Use counter-holder tool (T10069) to tighten and loosen --> [ To Loosen and Tighten Bolt, Lock Vibration Damper
using ] Service and Repair
15 Chain tensioner with tensioning rail
• For roller chain --> [ (Item 17) Roller chain ]
• Before installation the release locking device in the chain tensioner with a small screwdriver and press the tensioning plate against the chain tensioner
• Only rotate engine with chain tensioner installed
16 Drive gear
• Integral part of crankshaft
• Ground down tooth aligned with main bearing joint = TDC cyl. 1 --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
17 Roller chain
• Mark direction of rotation before removing (installation position) --> [ Roller Chain, Marking ]
• Installing --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
18 Guide rail
• For roller chain --> [ (Item 17) Roller chain ]
• Remove and install together with roller chain --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
19 Locating pin without collar, 10 Nm
• For guide rail--> [ (Item 18) Guide rail ]
20 18 Nm
21 23 Nm
22 Intake camshaft adjuster
• Identification: 24E
• Only rotate engine with camshaft adjuster installed
• Installing --> [ Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing ] Intermediate Driveshaft and Camshaft Drive Timing Chains, Installing.
23 60 Nm + 1/4 turn (90°)
• Replace
• Contact surface of sender wheel must be dry around bolt head when assembling
• To remove and install, counter-hold at camshaft using an open-end spanner (32 mm) --> [ Camshafts ] Camshafts.
24 Guide rail
• For camshaft roller chain --> [ (Item 3) Camshaft roller chain ]
25 Camshaft adjustment valve 1 (exhaust) (N318)
• For exhaust camshaft
• Before disconnecting, mark allocation of connector to component
26 Camshaft adjustment valve 1 (N205)
• For intake camshaft
• Before disconnecting, mark allocation of connector to component
27 Guide rail
• For camshaft roller chain --> [ (Item 3) Camshaft roller chain ]
• Clipped in at control housing
Roller Chain, Marking
- Mark roller chains before removing (e.g. with paint, arrow pointing in direction of rotation).
• Do not mark chain using a center punch or similar means!