1993 CHEVROLET CORVETTE Owners Manual

Downloaded from www.Manualslib.com manuals search engine rroblems on the Koad
Engine Overheating (COW.)
A Heater adradiator hoses, ’.-
.and oiher enginelparts, can
.be.very-hot. Don’t touch them ...If
you do, you canbe burned.
Don’t run the engine
if there is a
leak. If
you run the engine,.it could
lose all coolant. That could cause
an engine fire, and you could be
burned. Get any leak fixed before
you drive the vehicle.
216
If there seems to be no leak, check to
see
if the electric engine fans are
running.
If the engine is overheating,
both fans
should be running. If they
aren’t, your vehicle needs service.
How to Add Coolant to the Coolant
Recovery Tank
If you haven’t found a problem yet, but
the coolant level isn’t at
or above
COLD,
add a 50/50 mixture of clean
water (preferably distilled) and a proper
antifreeze at the coolant recovery tank.
(See the
Index under Coolant for more
information about the proper coolant
mix. )

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Adding only plain:water.to
yam cooling system can be
dangerous. Plain water, or some
other .liquid like alcohol, can boil
before the proper coolant mix will.
Your vehicle's coolant warning
system is set for the proper coolant
mix. With plain water or the wrong
mix, your engine could get too hot
but
you wouldn't get the overheat
warning. Your engine could catch
fire and you or others could be
burned. Use a 50/50 mix of clean
water and a proper antifreeze.
You can'bebumed if you
. -spiU"CoolaZit hot engine '
parts. Coolant contains'ethylene
glycol and it will burn .if the engine
parts are hot enough. Don't spill
coolant on a hot engine.
When the coolant in the coolant
recovery
tank is at or above COLD,
start your vehicle.
If the overheat warning continues,
there's one more thing you can try. You
can add the proper coolant mix directly
to the coolant high fill reservoir, but be
sure the cooling system is cool before you
do it.
3

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How to Add Coo/ant to the Coolant
Recovery Tank (CONT.)
CAUTlON
Steam and scalding liquids
from a hot cooling system
can blow out and
burn you badly.
They are under pressure, and if you
turn the.coolant high fill reservoir
pressure cap-even a little-they
can come out at high speed. Never
turn the cap when the cooling
system, including the coolant
high
fill reservoir pressure cap, is hot.
Wait for the cooling system and
coolant high fill reservoir pressure
cap to cool if you ever have to turn
the pressure cap.
How fa Add Coolant to the Coolant
High FM Reservoir-LT1 On/y 1. You can remove the coolant high fill
reservoir pressure cap when the
cooling system, including the coolant
high fill reservoir pressure cap and
upper radiator hose,
is no longer hot.
Turn the cap slowly to the left until it
first
stops. (Don't press down while
turning the pressure cap.)
If you hear a hiss, wait for that to stop. A
hiss means there is still some pressure
left.
.n
- ,.

Downloaded from www.Manualslib.com manuals search engine 2. Then keep turning the prissure cap,
but ~QW push down as you turn it.
Remove the pressure cap
3. Fill the coolant high fill reservoir witk
the proper mix, up-to the base of the
filler neck.
I
A You cm be'burned if-you ." : ' ,
spill.. coolent :on hol engine
p.arts. Co&mt contains ethylene
glycol and it -will burn if-the engine
parts are hot enough. Don't spill
coolant on a hot engine.
4. After the engine, codls, open the ak
bleed valves on the throttle body and
water pump inlet..

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Problems on me Road
I 220
6. Add coolant to the coolant high fill
resgmoir until you see a steady
stream of coalant c:oming from the
bleed valves. Theen close the bleed
valves.
7. Continue to fill the coolant high fill
reservoir up to the -base .of the filler
neck..
8. Rinse or wipe the sp,illed coolant
frori~ the engine ariid curnp-artment.

Downloaded from www.Manualslib.com manuals search engine P
R
.-
c
idlefor- approximately four niinutes.
By this-time, the coolant level inside
the coolant high fill reservoir will he
lower.. Add msie of the. proper mix
through the filler neck until the level
reach-es the base of'the filler neck.
10. Shut the engine off and replace the
pressuk cap. Be sure the arrows .oii.
the- cap line up as: shown above.
11. Then fiu the coolant recovery t.ank
Be sure to put the cap back on the
coolant recovery tank.
a to the HOT IIM~~C-OII the dipstick.
For a.complete drain, .flush and refill,
see your ChevroIet de-aler or. a Chevrdet
Corvette SerPice Manual. To purchase a
service manual, see the Index under
Service PuGlicationS.

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How to Add Coolant to the Coolant
High Fi/l Reservoir-LT5 On/y
1. YQU can remove, the coolant high fill
reservoir pressure cap when the
cooling system, including.the coolant
high fill reservoir pressure cap and
upper radiator hose, is no longer hot.
Turn the pressure cap slowly to the
left until it first stlaps. (Don't press
down while turning the pressure
cap .)
If you hear a hiss, wait for that to stop.
A hiss- means ther,e is still some pressure
left.
122
2. Then keep turning. the pressure cap,
-but
now push down as you turn it.
Remove the pressure. cap.
3. Fill the coolant high fill reservoir with
the proper mix, .up to the base of the
filler neck.

Downloaded from www.Manualslib.com manuals search engine 4. Then fill the coorant recovery tam to
the HOT mark an the.dip$tick..
-5.. Put the cap back on the- coolant.
recovery tank, but leave the coolant
high fill reservoir pressure cap off.
6. Start the engine and let it m until
y~u can feel the upper radiator hose-
getting hot. Watch out for the engine-
fans.
7. By this time the coolant level inside
the coolant high fill reservoir filler
neck may be -lower. if the level is
lower, add more of the proper mix
thxough the filler neck until the level
reaches..the base of the Tiller neck.