Camshaft Followers And Hydraulic Tappets; Refit Camshaft Positioning Tool To Valve Timing Checking Hole; Unscrew Closure Bolt From Intake Camshaft Side Of Camshaft Housing; Fit Camshaft Positioning Tool For The Intake Camshaft - Opel Zafira B MPV 2006 Owners Workshop Manual

20•12 1.9 litre DOHC diesel engine in-car repair procedures
10.22 Refit the camshaft positioning tool
to the valve timing checking hole of the
exhaust camshaft
10.24 With both camshafts locked, tighten
both drive gear retaining bolts to the
specified torque
dogs is fitted to the exhaust camshaft, and the
plain gear is fitted to the intake camshaft.
21
Screw in a new drive gear retaining bolt
for each camshaft and tighten both bolts
finger-tight only at this stage.
22 Refit the camshaft positioning tool to the
valve timing checking hole of the exhaust
camshaft. If necessary, rotate the exhaust
camshaft slightly, until the tool audibly
engages (see illustration).
23 Unscrew and remove the closure bolt
from the intake camshaft side of the camshaft
housing and fit a second camshaft positioning
tool (see illustrations). If necessary, rotate the
camshaft slightly, until the tool audibly engages.
24
With both camshafts locked by means of
the positioning tools, tighten both drive gear
retaining bolts to the specified torque (see
illustration).
It may be beneficial to have
an assistant securely support the camshaft
housing as the bolts are tightened.
10.27 Similarly, fit a new exhaust camshaft
oil seal to the camshaft housing
10.23a Unscrew the closure bolt from
the intake camshaft side of the camshaft
housing ...
10.26a Fit a new intake camshaft blanking
cap to the camshaft housing ...
25 Remove the positioning tool from the
intake camshaft housing and refit the closure
bolt. Tighten the bolt to the specified torque.
26
Fit a new intake camshaft blanking cap to
the timing belt end of the camshaft housing
and tap it into position until it is flush with the
outer face of the housing, using a suitable
socket or tube, or a wooden block (see
illustrations).
27 Similarly, fit a new exhaust camshaft oil
seal to the timing belt end of the camshaft
housing and tap it into position until it is flush
with the outer face of the housing, using a
suitable socket or tube, or a wooden block
(see illustration).
28 Refit the timing belt sprocket to the
exhaust camshaft, aligning its cut-out with
the locating peg, and fit the new retaining bolt
finger-tight only at this stage. Final tightening
is carried out after the timing belt has been
fitted and tensioned.
29 Refit the camshaft sensor to the camshaft
housing and tighten the retaining bolt
securely.
30
Refit the oil filler housing to the camshaft
housing using a new gasket, refit the retaining
bolts and tighten the bolts to the specified
torque. Reconnect the coolant temperature
sensor wiring connector.
31
Refit the braking system vacuum pump as
described in Chapter 9.
32 Thoroughly clean the mating faces of the
cylinder head and camshaft housing.
33 Refit the camshaft housing to the cylinder
head as described in Section 9, paragraphs 13
to
26.
10.23b ... and fit a camshaft positioning
tool for the intake camshaft
10.26b ... and tap it into position until it is
flush with the outer face of the housing
34 Commence refitting of the timing belt as
described in Section 6, paragraphs 9 to 14.
35 Retain the camshaft sprocket using the
holding tool, and tighten the retaining bolt to
the specified torque.
36 Continue refitting of the timing belt as
described in Section 6, paragraphs 15 to 30.
Removal
1 Remove the camshaft housing as described
in Section 9.
2 Obtain sixteen small, oil tight clean
plastic containers, and number them
intake 1 to 8 and exhaust 1 to 8; alterna-
tively, divide a larger container into sixteen
compartments and number each com-
partment accordingly.
3 Withdraw each camshaft follower and
hydraulic tappet in turn, unclip the follower
from the tappet, and place them in their
respective container (see illustrations). Do
not interchange the followers and tappets,
or the rate of wear will be much increased.
Fill each container with clean engine oil and
ensure that the tappet is submerged.
Inspection
4 Examine the followers and hydraulic tappet
bearing surfaces for wear ridges and scoring.
Renew any follower or tappet on which these
conditions are apparent.