Timing Chains And Sprockets; Balance Shaft Chain Tensioner; Chain Tensioner And Guide Rails; Turn Inner Piston Screw Clockwise Until It Locks In Position - Opel Zafira B MPV 2006 Owners Workshop Manual

Refitting
6 Pretension the timing chain tensioner,
by turning the inner piston clockwise
(see
illustrations)
and allow it to lock in position.
Lubricate the inner piston, then reassemble
the timing chain tensioner.
7
Renew the sealing rings, then lubricate
the timing chain tensioner/piston with clean
engine oil and insert it into the cylinder head.
Note:
Check the threads are clean on the
tensioner and in the cylinder head before
refitting.
8 Tighten the tensioner to the specified
torque.
9 Release the tensioner, by pressing on the
tension rail/timing chain with a rounded bar
(see illustration). This will press against the
inner piston of the tensioner to unlock it, when
it releases, the spring-loaded piston will take
up the slack in the timing chain.
Caution: This procedure must be carried
out correctly, otherwise the chain may be
left slack and skip a tooth on the sprockets.
This will result in engine damage.
10
Rotate the crankshaft through two
complete rotations (720°) in the correct
direction of rotation and recheck the valve
timing as described in Section 3.
11
Refit the camshaft cover as described in
Section 4.
12 Refit the wheel arch liner inner cover
and roadwheel, and lower the vehicle to the
ground.
Balance shaft chain tensioner
Removal
13 Remove the timing chain cover as
described in Section 6.
14
Undo the two retaining bolts and remove
the balance shaft chain tensioner from the
cylinder block.
Caution: Do not rotate the engine whilst
the tensioner is removed.
15 Inspect the tensioner piston for signs of
wear or damage and renew if necessary.
Refitting
16
Pretension the balance shaft chain
tensioner, by turning the piston clockwise
approximately 45° and push it back into the
tensioner housing. Insert a 1.0 mm locking pin
or drill bit into the hole in the piston housing,
which will lock the piston in position
(see
illustration).
17
Lubricate the tensioner piston with clean
engine oil, then refit it onto the cylinder
block tightening the bolts to their specified
torque.
18
Once the tensioner is in position, remove
the locking pin to release the tensioner piston
(see illustration).
Make sure the piston
engages with the tension rail correctly and
takes up any slack in the balancer shaft timing
chain.
Caution: This procedure must be carried
out correctly, otherwise the chain may be
left slack and skip a tooth on the sprockets.
2.2 litre petrol engine in-car repair procedures 28•7
7 .6a Turn the inner piston screw clockwise
until it locks in position ...
7.6b ... then fit the inner piston to the
outer tensioner assembly
7.9
Press the bar against the tension rail to release the tensioner inner piston
This could result in engine vibration or
damage.
19 Refit the timing chain cover as described
in Section 6.
Chain tensioner and guide rails
20 Tensioner and guide rail removal and
refitting is part of the timing chain and
sprockets removal and refitting procedure
(see Section 8). They must be renewed if they
show signs of wear or damage on their chain
surfaces.
7 .16 1.0 mm drill bit (arrowed) used to lock
the tensioner piston in place
Note: In order to set the valve timing accurately
at TDC, a Vauxha/1/0pel special tool (or
suitable alternative) is required (see Section 3).
If the timing chain and sprockets are to be
completely removed or refitted, then this task
can be carried out without the tool. The timing
can be re-aligned using the coloured links on
7.18 Removing the locking pin to release
the tensioner