Westerbeke 46 Betreibershandbuch PDF herunterladen (Seite 26)

CYLINDER

HEAD

AND

VALVES

1.

Tighten

cylinder

head

bolts

in

the

sequence

shown.

The

engine

should

be

cold.

Loosen

each

bolt

one-eighth

to

one-quarter

turn

when

tightening

in

the

sequence

shown.

Note

that

bolt

14

and

5

are

located

under

the

intake

manifold

where

it

is

attached

to

the

head.

0

16

14

12

10

11

15

1

Head

Bolt

Tightening

Torque:

0

0

0

0

Q

0

0

0

0

Exhaust

Side

0

0

@J

0

@)

0

12.0

kg/m

(86

Ib/ft)

8

1

9

Intake

side

0

10.5

kg/m

(76

Ib/ft)

6

2

7

2.

Tighten

rocker

shaft

bracket

bolts

to

1.5

kg/m

(11

Ib/ft).

3.

Adjust

valve

clearance

with

the

engine

cold

following

retorquing

of

cylinder

head

bolts

according

to

the

following

procedure.

The

valve

clearance

is

0.2

-

0.3

mm

(0.009

-

0.012

inch).

A.

Rotate

the

crankshaft

slowly

in

the

normal

direction

of

rotation

to

bring

the

piston

of

the

number

1

cylinder

(front

of

engine)

to

T.D.C.

of

it's

compression

stroke.

(Observe

when

this

is

done

that

the

valves

of

the

number

4

cylinder

are

in

a

position

of

valve

overlap,

ie.,

the

period

between

the

opening

of

the

inlet

valve

and

the

closing

of

the

exhaust

valve.)

B.

In

this

position

adjust

the

valve

clearance

in

the

conventional

manner

of

the

intake

and

exhaust

valve

of

the

number

1

cylinder,

the

intake

valve

of

the

number

2

cylinder

and

the

exhaust

valve

of

the

number

3

cylinder.

C.

Rotate

the

crankshaft

in

the

normal

direction

of

rotation

one

full

turn

(360")

and

stop.

D.

In

this

position

adjust

the

valve

clearance

of

the

intake

and

exhaust

valve

of

the

number

4

cylinder,

the

exhaust

valve

of

the

number

2

cylinder

and

the

intake

valve

of

the

number

3

cylinder.

Exhaust valves

l

\f

\ l

\1

I : :

~

I :

\ ---;---\

~

~

"T"\

...

"

...

,./

U

.,....

~

...

"

--

--

--

_

....

-~--

Inlet valves

24

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 47 48

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