PS Magazine - NOVEMBER 1986
PS, The Preventative Maintenance Monthly
ISSUE 408
NOVEMBER 1986
Engines .
..
Your engine's In fr a lot oF troubLe IF you run It at low ±d²e fr a long time.
Or worse, IF ³ou staRt It up and shut It down-over and over agaIn´BEfre It has
a
c
to hEaT upµ
¶ngiNes are at theIr BEst when hot´up to normal operatIng temPratUres· ¸he¹
rUn smootheº and last longer.
Here»s what hapPns when ³ou run ³our engIne at low hEat:
•
¼uel anD oIL are not comp½ bu¾e¿ iÀ the combustIon chamBers, leAvIng
carbon deÁsIts on the vÂÃve stemsÄ Åhat CarBon fuls up vÆve operatIonÇ ¸Èe
resuÉt Is BuÊEd vAlVes and BEnt push rodsË
Carbon
deposits
foul
valve
sTemS
.±² ------³
---´
•
ÌondensatIon and unbÍÊÎd Ïel sLIps around the ÐIstonsÑblowb³Òand Into
the crankcase. Óhere It Ôs acId aÀd sLudge Õ ³our engIne oIl.
22
YOt CTLo,IF y±V 4l²³5
FN A± 71£ ²OKH³L
´Pc.
´NG µ¶HP·R7K
/
•
ÌondensatIon Öom no×al enGØe breathIng nEver gets BoIled oÙÚ ÛnstEadÜ It
BuIlds up as more acId And more sludge in the crAnKcaseÝ
•
¶ngÕe oIL bÞs downß àoor luBrIcAtIon buMs up bángsÝ
µludge
blo¶ks
lube
p·ssage
•
Sludge BloCâ lube passagesÝ OIL canãt get thäough to luBe and coolå Heat and
æIctIon tear up ³our çngèeÝ
éIgh spêd Idlëng prevents this ìnd oí troubLeî
Watch the ï¶ðà gage on ³our dAshî Hold the engÕe sñòd hIgh enough to
keep the nEedLe In the normaÉ operating
range spócIôEd in ³our
-10
õðö
Watch the tachometerÝ
¸
teLLs ÷
søùÄ ¼ënd úe sûü nýEd
¹
þe úe
heat that kEeps the ¸¶ðà gage In úe
normaL
operatëng rangeÿ
Āeep ³our Idle high and avoIā stopĂ
andăstart drivIng and ³our eĄąĆe wILL
ć
peĈForm at Its bestĉ
º
'=±²:³;´.µ¶·-J
»¼v 86
23
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