PS Magazine - NOVEMBER 1981
PS, The Preventative Maintenance Monthly
ISSUE 348
NOVEMBER 1981
Time and parts are beiNg was±ed fixing "leaks² tha±'re No± leaks at all.
Perfectly good engine head gaskets are being replaced by
DS
just because
someone s³ots small bubbles or seepage or hears hissiNg Noises from the
engine.
-
Those sigNs ·may meaN a bum head
gasket or loose cylinder head. Then
agai´, th y may not.
Hissing and sligh± Seepage caN be
normal
for
mUl±ifuel
eNginesµ
especiallY on the right side where
±here are head gaske± veNts. This may
be only condeNsation bei¶g vented as
These vents are open at the
edge of the cyliNder heaD. Moist
air may be sucked iN wHen the
±
±
.
±
engIne cools down² TheN, condensation
the en
Me heats
.
Up¸ If s
?
,
±
t
II
sto¹ Ma
-water-wiLl be forced oUt
short tºme. But, »f the h1ssMg ¹Ulsates
and caN make a hissing sound
or if ±he seepage doesN't s±op, your
¼
½
.
when the enGine heats up again²
support shoULd check it out.
·
9
20
. ±
Prove it Yourself
A
few si¾ple checks will show whether you¿ve go± leaksÀoil or
coolantÁinside or oUtside.
²1
ÂExcessive² means oià or coolant
actÄally running down the block.
Remember, your engiNe¿s lube
Å
and
cooliNg systems are uNder ¹ressure
when the eNgiNe¿s runNing, sodoubleÆ
check any dam¹ spots or streaks after
yoUr eNgiNe¿s Up to Normal o¹erating
temperature. Pressure buildup may
bring out a leak tha± doesN¿t show
when ±he engiNe¿s cold.
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