Valves; Removing The Valve Timing Gear And Camshaft; Replacing Timing Gear And Camshaft; Valve Dimensions - PEUGEOT 404 Owners Workshop Manual

VALVES
I
ntoke
Inioke
E
xhou st
FIG
1:10
lnlet and
1
and
3
Exhaust and
type
Number
2Íor
1
ano
3
fnlet and
2
and
4
Exhaust.
6
The rocker pushrods
are made
oÍ
a special steel with
cyanÍde treated ends. They
are
oÍ two
types with
different lengths but the maximum permissible
out
of
round
for either
is .4mm.
The
dimensions for the pushrods
are
as
follows:
Inlet rocker pushrod,
total
length,
185.6
mm.
Exhaust
rocker pushrod,
total
length,
219.5mm.
7
Finish decarbonizing by
cleaning carbon from
the
piston crowns. Spring an
old piston ring into the
bore
on
top oÍ
the piston and
scrape
with
a blunt tool
so
that
a
ring
of
carbon
is
left
round the periphery to
prevent
excessive
oil
consumption. Clean
off
thor-
oughly and make sure
that
the faces
of the
head ano
cylinder
block
are
Íree
Írom
particles.
8
ReÍit
the
cylinder head as detailed
in Section
1:4.
Make sure
that all
pushrods
are
engaged
with
the
tappets and rocker adjusting screws
before
tightening
oown.
1
:6
Removing
the
valve
timing
gear and camshaft
lÍ the
cylinder head
is
removed ensure
that
the
cylinder liners are
set in position
with
the setting
screws.
lf
the
cylinder
head is on the engine
remove
the
spaÍking
plugs to allow
easy
rotation
of the engine.
1
Remove
the crankshaÍt pulley and its
locking
key, the
timing geaÍ housing
and the oil rejecting ring.
2
Refer
to
FIG
1
:12
and remove
the
base
screw
ano
lockwasher
Írom the
base
of the tensioner
body.
3
Through the screw
hole
thus
uncovered,
insert
an
Allen key into
the
hexagonal catch
oÍ the piston,
5.
Turn
the key clockwise to
Íree
the
sole
I
from
the
pressure oÍ the spring
6.
4
Remove
the
tensioner attaching screws 3, and with-
draw the tensioner from the cylinder block. Withdraw
the
oil filter
from the
recess in the cylinder block (see
FIG
1
:13).
5
Remove the camshaÍt sprocket attaching screws
and
take oÍÍ the
sprocket and timrng
chain.
P404
Valve dimensions
6
Remove the scÍews retaining the
camshaft
front thrust
plate and withdraw
the
camshaft taking
care not
to
damage
the camshaft
bearings
during the process.
1
:7
Replacing timing
gear and camshaft
1
Fit the
camshaft taking
care
not to
damage the
bear-
ings
or the
edges of the
cams and journals.
Secure
with
thrust plate
screws. Rotate
the
camshaft
to
ensure
that
it
íevolves
freely
in
its
bearings.
Check
INL ET
FIG
1:12
Exploded view of
the
timing
chain tensioner
Key
to
Fig
1
:
1
2
1
Base screw and lockwasner
2
Tensioner
body
3
Attachment
holes
4
Oil intaxe
5 Piston 6 Spring 7 Dowel 8 Pin
9
Rubber sole
10
Chain lubrication
hole
FIG 1
:1
1
Rocker gear
13