PS Magazine - AUGUST 1979
PS, The Preventative Maintenance Monthly
ISSUE 321
AUGUST 1979
The heat from the block will turn tHe
coolant in the water jAcket to steAm.
The locked-in heat cAn crAck or wArp
the head, or vAlves± or ruin heAd
gAskets± or cArbon up rings± or cAuse
Fuel injector nozzles to plug up²
HSTE MKFs WA±te
w²N ) ³U´ Dµn
a LIuid-COl¶·
¸¹º»¼½
¾¿ÀÁÂfUÃÄ
ÅÆÇÈ VhÉÊË ÌÍ'Î
ÏÐÑÒÓ ÔoÕÖ×BØvÙ
10°
Ú.
Some liquid-cooled diesel
engines³like iN the GAmA
Goat´hAve aluminum
blocks² µeAt will dAmA¶e
an aluminum block ·Aster
tHan An iron oNe¸
Run at
1±000
RPm
until
your
temperAture
gAge
shows
180°¹ or
lowerº Idle
down±
tHen
sHut
down¸
Diesel engines in vehicles like tHe M109 or
m113Û1
fA»ily reAlLy
need tHe i¼le½cool sHUt¼own treAtmeNt¸ ¾Hey've been PUt ¼Ow¿ Àn A
hole where air cAnÁt Flow ÂAround tHem² Ãf ÄHese eN¶Ànes AÅe
shutdown hot± thereÆs no plAce ·oÇ tHe HeAt tO ¶o¸ I¼leÈcoOl tHem At
about 1É000
RPm
For 2 minutes± theN At 650È700
rPÜ
UNtil tHe temP
gage is at 180°¹ or lower²
Ý
Þßàáâãä åæç
èé êëìí cîïðñ òóôõö÷
øùGúûü ýþÆÿĀ ÆāĂΠ㥹
Ćć JĈĉĊ ċ bČč ĎďĐ
Engine lube oil± speciAl
Fins oÊ bAFFles± anË A
Fan or blower are used
to cool these engines¸
When you shutdown± the oil stops
Flowing. It can Ìo longer carry Away heat
From the bloCkº THe fAn quits blowing
cool air over the engine² The heatÆs
locked up in the HeAd and block becAuÍe
the fins canÁt cArry it AwAy Fast enough ºÎÏ
IdleÈcooling is real important ·or tHAt
big Air-cooled± turbocharge¼± reArÐ
mounted± inclosed 1ÑÒ0 diesel
engine used in tAnks an¼ recovery
veHiclesÏ IdleÈcool
3
to 5 minutes At
Ó000 to Ó20Ô
đPm
beFore shUtdownÕ
ָΠthis locked in
heat can warp or
c×Øck heads or
valves and carbon
up riÙgsÎ
Úlways Follow your -10TM. ÃF
Ût tells you to idleÈcool before
shutdown± you owe it to your
engineÁs liFe to do itÎ
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