PS Magazine - MAY 1979
PS, The Preventative Maintenance Monthly
ISSUE 318
MAY 1979
t
Even worse, the crankshaft churns the Oil into foam 'n± froth. The oil pump
picKs up this bUbbly stuff-instead of straight oil-and sends it around thr²Ugh
the engine where lubrication and cooling Are needed³ Those tiny bubbles Don±´
make for a solid oil film on BeariNgs³ Friction puts the bi´e µn b¶arings· ¸nd
friction builds heat·
Oil Is pumped aLL the way up to lubE
the rocker armS, vaLveS and puSh rodS
OiL iS fed to
aLL beaRingS
[
YOUR ENGINE
i
I
neEDS STRAIGHT OIL
I
:1
-NOT FoAM
!
1 ;
i !
·
:
±
²
³
´µ¶¸¹
.
º
,
±
S'RGT
/
;±²
³°
OIL
.
.
•
/
'
´
/
•µ¶\·
•.
:±
¸
,
²
·
-
'
±
¹
Y
r
»
ºGin±s»cyLiders
ca´ch It, ´oo, when oiL±s pumP¼½ ¾p InRocoMb¿S´Ion
t
chaMbers. This s´arts wi´h ´he crÀnÁShaÂt spÃashing aLL of ´HÀ´ ¼x´rÀ oIL Àro¾nd.
ÄiL scraper rings on ´he piS´ÅnS cÀnÆ´ HÀn½L¼ So M¾cH oIÇ SpLÀSH¼½ ¾p In´È ´h¼
cylindersÉsÊ the oIL Is cArrI¼d on upË
This oIl b¾rns, bu´ i´±s ´he Wrong kInd of f¾¼ÇÉSo I´ LeÀV¼S cÀrbon In ´h¼
combustionÌchambers. Then yo¾±Ve Ío´ ho´ SpÈ´S ´hÀt±LL cÀ¾S¼ MIsÂirInÍ. În½
s
Ï
park plugs in gasolin¼ engines ÂouÇ Âas´ ¾n½er ´HIs LoÀ½ of cÀrÐÈnÑ
ÒiL pUmped Up into the cylinders o a ½ieseL enÍin¼ ¾pSe´S ´h¼ ÀirÓÔ¼Ç
baLÀnce. Õesides being Öhe wrong Áin½ of fu¼L, I´×S ´oo M¾chÑ ØnÍIn¼ poW¼r ÍoeS
´o potÑ
22
¸nd in soÙe diesel engines, thÚ oil
gets intÛ the air BoX throÜgh Ýhe
cylÞnder ports. ßt±s ´oà much fár the air
BoX
drains
´o
hanâe,
and
´hen
someone±s got a ãessy job of cleaning
the air BoX.
YoUr engine±s ventilation system
picks up that splashing oil, too. The
vent system±s already go´ a big job
cArrying
condenSationä blowby
and
such out of ´he crAnkcase· ßn most
gasoline engines, this s´uff is sucked
oU´
å
by way of the æCç vaLve (æCç
means positive crankcase ventilation),
carburetor and
gets
Burned
in
the
combus´ion
chambers³
ßn
diesel
engines,
i´ès
dumped out the road draft tuBeÑ
±oad
DraFt
tuBe
(alSo
calLeD
cranK
caS²
Breather
tubE)
Õut
An
overloaéed
vent
sys´em
spêlls trouble in ëhe Making. ær¼´ty
soon yìur æCç valve plugs up With
this miXture of oil and condensation.
¸nd you wonder why your engíne±s
running îso ïoorly.
ðlso, sludge BUilds up in your
crankcaseñBecause the vent system
can±t get rid of ´hAt condensation and
blowBy.
òet it strAigh´! ¸ll engines are not
the same. ¸ll dipstóks are not the
same³ ôoõ you don±t check the oil level
¹
ColD enGIne-anywHere
Between add and
rº
Inche³ aBovE
FuLl iS SaFe
´'rInStaNce-hot
FU
»»
IS DiFFErent from
µolD FULL iN a
MULtifuel engiNe
¼ .½¾
in all öngines the same wAy³ Your
engine ÷ay even have different "fullø
oiL
leveùsÉdepending
on
whe´úer
yoU±re checking hot or cold.
You±ve got to go by the ûÄ für ´hý
engineþÿand
only
that
engineÉin
your equipmen´. You±ve got ´o "reÀ½Ā
the āipsticĂ jăst like the ûÄ ´elLs you.
Ąnough oiL? Too much oiL? òe´ it
ą
righ´Ć
±3
±·
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