Installation manual

ManualsBrandsWesterbeke ManualsAutomotive120D-TWO

COOLING

SYSTEM

THERMOSTAT

A

thennosta~

located

near

the

manifold

at

the'

front

of

the

engine,

controls

the

coolant

temperature

as

the

coolant

continuously

flows

through

the

closed

cooling

circirit.

When

the

engine

is

first

started,

the

closed

thennostat

prevents

coolant

from

flowing

(some

coolant

is

by-passed

t)rrough

a

hole

in

the

thermostat to

prevent

the

exhaust

manifold

from

overheating).

As

the

engine

warms

up,

the

thennostat

gradilally

opens.

The thennostat

is

accessible

and

can be

checked,

cleaned,

or

replaced

easily.

Carry

a

spare

thermostat

and

gasket

A

coolant

recovery tank

allows

for

engine

coolant

expansion

and

contraction

during

engine

operation,

without

any·signifi-

cant

loss

of coolant

and

without

introducing

air

into

the

cool-

ing

system.This·

tank

should

be located

at

or

above the

engine

manifold

level

and

should

be

easily

accessible.

TO

COOLANT

RECOVERY

TANK

FROM

COOLANT

RECOVERY

TANK

KEEP

THE

COOLANT

PASSAGE

CLEAR

Replacing

the

Thermostat

Remove

'the

cap screws

and

disassemble

the

thermostat

housing

as

shown.

When

instaJJingthe

..

ii:ew

thermostat

and

gasket,

apply

a thin coat of sealant

on

both

sides

of

the

gasket

before

pressing it

into

place.

Do

not

over-tighten

the

cap

screws.

Run

the

engine

and

check

for

normal

temperatures

and that

there

are

uo

leaks at

the

thermostat

housing.

.

THERMOSTAT

'ASSEMBLY

HOUSING

A

CAUTION:

The

engine

must

be

allowed

to

cool

doWn'

before

attempting

these

procedures.

Not

only

is

the

surface

of

the

engine

hot

but

coolant

temperatures

can

be

at

190'

F.

Eng/nilS

&

Generators

17