OCTAVIA
Cylinder Head, Valve Gear 15
Edition 04.01
S00.5123.51.20
------------
15-1 -------------
Removing and installing cylinder head
Notes:
♦ Always replace cylinder head bolts.
♦ Always replace self-locking nuts.
♦ Always replace bolts which are tightened to
a torquing angle.
♦ Always replace seals and gaskets when car-
rying out removal and installation operations.
♦ If a replacement cylinder head with camshaft
installed is fitted, the contact surfaces be-
tween bucket tappets and cam track must
be oiled after installing the head.
♦ The plastic bases supplied as a protection
for the open valves, must not be removed
until just before fitting on the cylinder head.
♦ If the cylinder head is replaced, the entire
cooling system must be filled with fresh cool-
ant.
♦ Cylinder heads with cracks between the
valve seats or between a valve seat ring and
the spark plug thread, can continue to be
used without any reduction in life provided
these are slight incipient cracks not more
than 0.3 mm in width, or only the first 4 turns
of the spark plug thread are cracked.
Testing compression
⇒ 1.8 l/92 kW Engine - Mechanical Compo-
nents; Repair Group 15.
1 - Cylinder head
♦ after replacing, fill system with fresh
coolant
♦ removing cylinder head ⇒ page 15-2
♦ installing cylinder head ⇒ page 15-6
♦ inspecting for distortion
⇒ 1.8 l/92 kW Engine - Mechanical
Components; Repair Group 15
♦ reworking dimension ⇒ Fig. 1
2 - Oil deflector
♦ pay attention to installation position:
above inlet camshaft between cylin-
ders 1 and 2
3 - Cylinder head bolt
♦ replace
♦ pay attention to correct slackening
order ⇒ page 15-2
♦ pay attention to correct tightening or-
der ⇒ page 15-6
4 - Gaskets for cylinder head cover
♦ replace if damaged or leaking
♦ before fitting on, coat contact areas
with D 454 300 A2:
double bearing cap/cylinder head
⇒ 1.8 l/92 kW Engine - Mechanical
Components; Repair Group 15
hydraulic chain tensioner/cylinder
head
⇒ 1.8 l/92 kW Engine - Mechanical
Components; Repair Group 15
5 - Cylinder head cover
6 - Gasket
♦ for ignition coil
♦ replace if damaged
7 - Ignition coil
♦ testing
⇒ 1.8 l/110 kW Engine - Motronic Fuel
Injection and Ignition System; Repair
Group 28
8 - 10 Nm
9 - Cap
10 - Seal
♦ replace if damaged
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