PS Magazine - OCTOBER 1983
PS, The Preventative Maintenance Monthly
ISSUE 371
OCTOBER 1983
I
"
)
'I
THIS WA M
wEatheR :
5Uf±
C,Pp²³
OFf
mY V´cµ¶iON
WE iAVe
To
·¸¹D
norº»
S±²N-
.±² -
.±²³ _´
-±²
³
_
´
:
.
µ¶
·¸¹
=
º»
³
·-
´
holds p
:
sure in the system when
-
c
coolant temperature goes
up.
Is your cooling system in shape
for cold Weather? If not, you may
be greeted With a cloud of steaM
coming from under the hood.
Even in Winter, your cooling
system has to carry heat aWay FOm
your engiNe. If the cooling system
µ
fails, the engine Will overheat and
Coolant under pressure boils at a
higher temperature.
/¼ su½¾¿À
's
BÁ.Â
ÃÄbÅLÆÇ ÈÉÊ
w³´D
ËÌÍÎÏ ÐÑ ÒÓ ÔÕÖ×Ø
ÙÚ ÛÜ
ÝÞßàáâ ã
Use only the cap that the T± lists
for your equipment.
a
cap scroung-
ed from other equipment or Fom
the can point Won't cut it.
The pressure rating is the key.
Too ²³W a pressure drops the boil-
ing point. Too high a pressure can
pop seams and bloW hoses.
Look over the cap for dents,
cracks or a bad gasket´anything
that could cause a leak. Check for a
snµg
F
on the filler neck, too.
Gäå
µ¶Z .·¸
seize up.
æçdèçéêë ìçí
1 t¹Rº MY
The radiator cap does more than
¶·
T
¸
h
¹
a
;:
t
º
's
»!
i
¼
m
½
p
S
o
¾
r
¿À
ta
Á
n
Â
t
ÃÄ
,
ÅÆ
b
Ç
ec
_
a
ÈÉ
u
Ê
s
Ë
e
Ì
it
=
le
Í
ts
ÎÏÐ
_µ
î gïðkñ
keÑp coolant in and
Ò
dirt Óut. It also
your engine run at the right
»¹rK¼n
½
¾U¿ ÀÁ
20
òóôõ!
21
There're
2
valves in the cap. The
pressure valve holds pressure in the
system, up Ôo Õhe pounds rating on
the cap. If the pressµre goes above
that, the valve opens to release exÖ
cess pressure.
The vacuum valve
×
opens When
the
engine
cools
doWn´after
operation´so
outside
pressure
Won't put a sqµeeze on the radiator
and other parts.
Press the pressure Øvalve to make
sure it moves fReely. Ùee that the
valve seats clean and true against
the shoulder doWn in the filler neck.
Look for dirt, gunk, or damage
that'll keep the vacuuÚ valve Ûrom
doing its job.
Have your mechanic check the
cap With a radiator cap tester, like Üt
says in Para
2Â9,
T±
750Ã254,
CoolÖ
ing ÙystemsÝ Tactical
Vehicles. The tester is
ö÷øù÷úûü
ÞÙÞ
49Ä0Â0ÄÂ0Ä8Â4373Å
ý÷þ
úÿĀúÿü
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