Vauxhall ASTRA Owner's Manual page 45

12.23a Fit the new gasket to the cylinder
block, engaging it with the locating dowels
(arrowed) ...
12.29 Fit the washers to the new cylinder
head bolts and screw the bolts into
position
TT Ensure the two locating dowels are in
:lOSltion then lubricate the camshaft followers
-Nrttl clean engine oil.
28 Carefully lower the camshaft housing
lssembly into position, locating it on the
,X)wels.
29 Fit the washers to the new cylinder head
"'Olls then carefully insert them into position
do not drop). tightening them finger-tight
fy at this stage (see illustration).
30 Working progressively and in the
sequence shown, first tighten all the cylinder
' o OOd bolts to the Stage 1 torque setting (see
trations) .
31 Once all bolts have been tightened to the
Stage 1 torque, again working in the
sequence shown, tighten each bolt through its
5OE!cified Stage 2 angle, using a socket and
~Jrte nsion
bar. It is recommended that an
ogle-measuring gauge is used during this
_ Iage of the tightening, to ensure accuracy
see illustration) .
12 Working in the specified sequence , go
round again and tighten all bolts through the
>DeCified Stage 3 angle.
33 Finally go around in the specified
~u ence again and tighten all bolts through
a s pecified Stage 4 angle.
304 Refit the bolts securing the timing belt
'9ar cover to the camshaft housing and
9hten them to the specified torque.
35 Ensure the right-hand engine mounting
yacket is correctly positioned, and tighten
r.e
retaining bolts to the specified torque.
l6 Refit the camshaft sprocket as described
SOHC petrol engine in-car repair procedures 2A-11
12.23b ... making sure its OBENfTOP
marking is uppermost
12.30a Cylinder head bolts tightening
sequence
in Section 8 then fit the timing belt as
described in Section 7.
37 Reconnect the wiring connectors to the
cylinder head components, ensuring all wiring
is correctly routed, and secure it in position
with the necessary clips.
38 Reconnect the coolant hose to the
thermostat housing and securely tighten its
retaining clip.
39 Refit/reconnect the man ifolds as
described in Chapter 4A (as applicable).
40 Refit the roadwheel then lower the vehicle
to the floor and tighten the wheel bolts to the
specified torque.
41 Ensure all pipes and hoses are securely
reconnected then refill the cooling system and
refit the spark plugs as described in Chapter 1.
42 Reconnect the battery then start the
engine and check for signs of leaks.
12.31 ... and then through the . v arious
specified angles (see text)
12.26 Apply sealant to the cylinder head
upper mating surface then refit the
camshaft housing
12.30b Working in the specified sequence,
tighten the cylinder head bolts to the
specified Stage 1 torque setting . .•
13 Sump-
removal and refitting
Removal
1 Disconnect the battery negative terminal.
Note: Before disconnecting the
battery, refer
to 'Disconnecting the battery ' in the
Reference section at the rear of this manual.
2 Firmly apply the handbrake then jack up the
front of the car and support it on axle stands.
3 Drain the engine oil as described in Chapter 1,
then fit a new sealing washer and refit the drain
plug, tightening it to the specified torque.
4 Remove the exhaust system front pipe as
described in Chapter 4A.
5 Where necessary, disconnect the wiring
connector from the oil level sender unit on the
sump .
Models not equipped Yo!ith air
conditioning (pressed-steel sump)
6 Slacken and remove the flywheel/driveplate
lower cover retaining bolts and remove the
cover from the base of the transmission unit
(see illustration) .
7 Progressively slacken and remove the bolts
securing the sump to the base of the cylinder
block/oil pump . Break the sump jOint by
striking the sump with the palm of the hand,
then lower the sump from the engine and
withdraw it (see illustration). Remove th e
gasket and discard it.