1994 BMW 318i valve spring cover

116-12



CYLINDER
HEADAND
VALVETRAIN

Valve
Seats



Valve
Springs

The
valve
seats
should
be
resurfaced
whenever
new
valves



The
valvesprings
should
be
checked
for
fatigue
.
To
quickly
or
valve
guides
are
installed
.
Cutters
are
required
to
resurface



check
the
springs,
line
them
up
in
a
row
.
Place
a
straight
edge
the
seats
.
Always
check
thevalves
for
leaks
after
recondition-



across
thetop
of
the
springs
.
Any
spring
that
is
significantly

ing
a
valve
seat
as
described
above
.
Table
e
lists
valve
seat



shorter
than
theothers
is
worn
and
should
be
replaced
.

dimensions
.

NOTE-
NOTE-



Valve
spring
specifications
and
wear
límits
arenot
Standard
size
replacement
valve
seats
are
not
avail-



available
from
BMW
.
ablefrom
BMW
.
Replacement
valve
seats
are
only
available
from
BMW
in
0
.4
mm
oversize
(oversized
in
both
height
and
diameter)
.
The
manufacturer
does
not
provide
specífications
for
valve
seat
replacement
for
the
enginescovered
by
this
manual
.

Table
e
.
Valve
Seat
Dimensions

"Y

Valve
seat
outside
dia
.
(B)

CYLINDER
HEAD
AND
VALVETRAIN,
RECONDITIONING

60
°
yl
1
B11110c

Specification



M42
engine



M42
engine



M44
engine



M50
engine



M501M52
engines



S50USIS52US
(1992)



(
(1993-1995)



I
(1996-1998)



(1992)



I
(1993-1998)



I
engines
(1995-
1998)

Valve
seat



45°



451



145°



145°



(
45°



145°
angle

Correction



1
15°



15°



115°



(
15°



15°



15
angle,
outside

Correction
60°



60°



I60°



60°



I60°



I60°
angle,
inside

Va
lve
seat
width
(A)
intake



1
1
.65
±0
.25
mm



1
1.65
±0
.25
mm



1
1
.65
t
0
.25
mm



1
1
.4
-1
.9
mm



1
1
.65
±0
.25
mm



1
1
.65
±
0
.25
mm
(0
.065
+0
.014
in)



I
(0.065
t
0
.014
in)



(0
.065
:E
0
.014
in)



(0
.055-0.075
in)



(0
.065
t
0
.014
in)



l(0
.065t0
.014
in)
____
___
exhaust



12
.0
±0
.25
mm



12
.0
t
0
.25
mm



1
1
.65
t
0
.25
mm



1
1
.4
-
1
.9
mm



11
.65
±
0
.25
mm



1
1
.65
:t
0
.25
mm
(0.079
±
0
.014
in)



1
(0
.079
t0
.014
in)



1
(0
.065
±
0
.014
in)



1
(0
.055-0.075
in)



1
(0
.065
t
0
.014
in)



1
(0.065
t0
.014
in)

intake



32
.4
mm
(1
.276
in)



32
.4
mm
(1
.276m)



32
.4
mm
(1
.276
in)



32
.4
mm
(1
.276
in)



32
.4
mm
(1
.276
in)



29
.4
mm
(1
.157
in)

exhaust



30
.1
mm
(1
.185
in)



30
.1
mm
(1
.185
in)



30
.1
mm
(1
.185
in)



30
.1
mm
(1
.185
in)



29
.4
mm
(1
.157
in)



26
.4
mm
(1
.039
in)

117-
1
0



CAMSHAFT
TIMING
CHAIN

21
.
On
1993
and
lates
engines
:
Remove
access
plugs
from



24
.
On
1993
and
later
engines
:

VANOS
control
unit
in
front
of
exhaust
camshaft



"
Remove
VANOS
control
unit
as
described
laterinthis
sprocket
.
Remove
4
bolts
from
exhaust
camshaft



repair
group
.
sprocket
(useTono
El0
socket)
.
See
Fig
.
26
.



"
Remove
intake
camshaft
sprocket
mounting
nuts
.

"
Remove
intake
and
exhaust
sprockets
together
with

secondary
chain
.
Note
location
of
thrust
washers
and

spring
plate
(where
applicable)
on
intake
sprocket
.

Fig
.
26
.
Exhaust
camshaftmounting
bolts
(arrows)
.

CAMSHAFT
TIMING
CHAINS,
6-CYLINDER

0013056

22
.
Depress
secondary
timing
chain
tensiones
and
lock

down
by
inserting
stiff
wire
into
the
openings
in
rear
of
tensioner
.
See
Fig
.
27
.

Fig
.
27
.
Secondary
timing
chaintensioner
being
locked
down
on
M50
engine
.
Press
tensioner
downand
insert
locking
wire
through
holes(arrows)
.
Tensioner
on
M52/S52
US
engines
vary
slight-

23
.
Remove
secondary
chain
tensioner
and
lift
out
primary
chain
guide
.

NOTE-

Hold
the
camshaft
stationary
(at
hex
on
camshaft)
when
loosening
ortightening
sprocket
mounting
boits
.

CAUTION-

The
crankshaft
must
not
be
allowed
to
rotate
once
the
timing
chain
is
removed
.
The
pistons
can
con-
tact
the
valves
.

25
.
On
1992
engines
:

"
Remove
from
intake
and
exhaust
sprocket
mounting

bolts
.
"
Remove
sprockets
together
with
secondary
chain
.

26
.
Remove
bolts
holding
lower
timing
chain
cover
to
cylin-

der
head
(use
Torx
E8
socket)
.
See
Fig
.
28
.

MR111:
R

Fig
.
28
.
Cylinderhead-to-timingchain
covermounting
bolts
(arrows)
.

27
.
Using
a
drift,
drive
two
locatiog
dowels
in
left
and
right

sides
of
lower
timing
chaincover
toward
rear
of
car
.
Re-
move
covermounting
boits
and
carefully
lift
cover
off
.
See
Fig
.
29
.

CA
UTION-

Use
care
when
removing
the
cover
from
the
cylin-
der
head
gasket
.
If
the
cover
is
stuck,
useasharp
knife
to
separate
it
from
the
head
gasket
.

340-
6BRAKES

bolt~



Guide
bolt

caps
covers
Brake
caliper
Shoe
retaining
píns

Parking
brake
cable

Fig
.
7
.



Rear
brake
caliper
assembly
.

Caliper
guide



Brake



ad
bolts
,



Bleeder
valve



i
_
~wear
sénsor
®



and
dust
cap



(right
wheel
V
.
.,,,

Brake
caliper,
removing
and
installing

1
.
Raise
car
and
remove
wheel
.

WARNING
-

Make
sure
the
car
is
firmly
supported
on
jack
standsdesigned
for
the
purpose
.

2
.
Loosen
brake
hose
fitting
at
caliper
.
Do
not
remove
.

3
.
Remove
caliper
mounting
bolts
from
steering
arm
(Font

caliper)or
from
trailing
arm
(rear
caliper)
.
See
Fig
.
8
.

4
.
Press
piston
back
into
caliper
and
slide
caliper
off
brake

rotor
.
Spin
caliper
off
brake
hose
.

5
.
Inspect
brake
caliper
for
signs
of
leakage
.
Check
that
caliper
piston
slides
smoothly
into
caliper
.
Replace
cal-

iper
if
any
faults
are
found
.

6
.
Installation
is
reverse
of
removal
.
Bleed
entire
brake

system
before
driving
car
.
See
Bleeding
Brakes
.

Tightening
Torques

"
Front
brake
caliper
to
steering
arm
..
110
Nm
(81
ft-Ib)

"
Rear
brake
caliper
to
trailing
arm
....
67
Nm
(50
ft-Ib)

"
Brake
fluid
hose
to
caliper
....
17-19
Nm
(13-14
ft-Ib)

"
Road
wheel
to
hub



........
100±10
Nm
(74±7
ft-Ib)

BRAKE
PADS,CALIPERS,
ANDROTÓRS

Cover

Caliper



!



Brake
pad
Oringiston



carne
-
p

Circli

©
ot~
AV
~:
Z



1vo~
Spring
and
spring
retainer



uust
seas



~~



Aniráttle

j),
Brake



spring
Shoe
pads
_
_

adjuster



per
return

nf

MIL

Rotor
with
integrated
parking
brake
drum
6573

0011256

Fig
.
8
.



Front
brake
pad
carrier
mounting
bolts
(arrows)
.
Rear
caliper
mounting
bolts
are
similar
.