Volkswagen Passat 2012, Service Training

Page: 18 / 44

14
Engines
S488_236
S488_238
S488_060
Do not punch through or clean the bore
with any kind of tool.
Chain Sprocket
The oil pump chain sprocket has a one-piece design
to prevent incorrect installation.
Chain Tensioner
The lower chain tensioner has been redesigned to work without engagement at a lower oil fl ow rate (originally
0.86l/min, now 0.04l/min). Removing the locking mechanism made it possible to reduce the chain forces. The
spring serves to pretension the chain during cold starting. The ram
fi lls the void in the hollow control plunger and
gives a faster response from the chain tensioner when oil pressure is building.
Chain tensioner module
Guide Rail
Marking for Primary
Chain Drive
Marking for
Camshaft Timing
Chain Drive
Control Plunger
Ram
Pretensioning
Spring
Choke Bore
Housing