PS Magazine - APRIL 1986
PS, The Preventative Maintenance Monthly
ISSUE 401
APRIL 1986
Engine LubricatIon .
..
It's OK to be generous, but NOT
whe± it comes to addi±g extra oil to
your e±gi±e's cra±kcase. That over-
filL i±creAses e±gi±e frictio± and heat,
robs engi±e poWer, a±d builds pres²
sure that causes leaks.
³hy Do operators overfiLl their
e±gi±es' crac´cases?
Could be they thi±´, "If
FULL
is
good, More is better.µ
Or, if they have a± e±gi±e thAt uses
oil, they thi±´ overfilli±g is a good
way to carry extrA oiL. .
. as protec²
tion agai±st run±i±g out of oil.
Or Maybe they have±'t read the
vehicle's ¶O and T·, so they do±'t
k±ow how Much oil their e±gi±e
±eeds.
But whatever the reaso±, they're
rui±i±g tHeir e±gi±es¸
The e±gi±e's desig± e±gi±eers de¹
cide ºow Much oil it ta´es to lubri¹
cate a±D cool the e±Gi±e's parts. This
is up to the »¼¼ Mark o± the dip½
stick o± Most e±gi±es.
22
They also decide how Much extra
oil tHe e±gi±e ca± ha±dle. That's
usuAlly up to the
FULL
Mark.
¾elow »¼¼ is ±ot e±ougH. »bove
FUlL
is too Much¸ That »¼¼¿to²
FU lL
rA±ge is all the extra oil your
e±gi±e ±eeds.
Àhe± you add oil over the
Fu LL
level, the cra±kshaft has to Muscle
through the overfill, rather tHa± dipÁ
pi±g i±to the oil.
ÂHis ÃuscÄi±g actio± is extrA work
for your e±gi±e a±d ta´es away froM
its drivi±g powerÅ THe eXtra wor´
Ma´es the oil a±d beAri±gs get too
HotÆ Oil pressure i±creases a±d oil
seaÄs ca± take just so Much pressUre
before tHey start to ÄeA´Æ
APR 86
)
»s the crA±kshaft plows through
the overfillÇ the oil starts to foaM A±d
bubble. That air¿filled oil gets puMped
through tHe e±gi±eÇ
Too much
means .±²
±²³ tHe crankshaft
is forced to
musCle throUgh
the oveRfill
BetweeN
FUll
aNd
ADD
oN
tHe dipstick ²²´
²²² tHe
craNksHaft
just dips
into tHe oil
but it does±'t lube
parts li´e straight
Oil is pumped all tHe way up to lube the
rocker arms, valves aNd PusH rods
oil. FoaMy oil ca±Èt
carry away e±gi±e
heat As well either,
so beari±gs get
hotterÆ
»s the oil Moves
through the e±gi±e,
it thi±s eve± More
a±d starts a chai±
reactio± that leads
to daMaged e±gi±e
parts.
Oil is fed
to all
beariNgs
You've got to go by your ¶O for the e±gi±eÉa±d o±ly that e±gi±eÊi±
your equipMe±tË You've got to read the dipstick Just Like the ¶O teLLs you.
ReMeMber, every e±gi±e has differe±t luÌi±g ±eeds. ¼Ín't let yÍur gener¹
osity destroy your e±gi±e.
New Radiator Hose Clamp nSn
³he± orderi±g claMps to hook up the overfLow hose betwee± the rÎDiator
a±d coola±t reserve tA±´ o± your ·880, use NSN 4730¿00¿871Ï6729.It's
cheaper a±d wor´s Just as well as NSN 4730¿00¿908Ï3195, sHown as Item 10,
Fig
14
i± T· 9Ï2320Ï266¿20P.
APR 86
23
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