1995 CHEVROLET CORVETTE engine overheat

Downloaded from www.Manualslib.com manuals search engine 1 NOTICE:
I
If’ your engine catches fire because you keep
driving with no coolant, your vehicle can be
badly damaged. The costly repairs would
not be
covered by your warranty.
If No Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no
steam, the problem may not be
too serious. Sometimes
the engine can get a little too hot when you:
0 Climb a long hill on a hot day.
Stop after high speed driving.
0 Idle for long periods in traffic.
If you get the overheat warning with no sign
of steam,
try this for a minute or
so:
1. Turn off your air conditioner.
2. Turn on your heater to full hot at the highest fan
speed and open the window as necessary.
3. If you’re in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while
driving
-- AUTOMATIC OVERDRIVE (a)
or DRIVE (D) for automatic transmissions.
If you
no longer have the overheat warning, you can drive.
Just to be safe, drive slower for about ten minutes. If the
warning doesn’t come back on, you
can drive normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there’s still no sign of steam, you can idle the engine
for two or three minutes while you’re parked,
to see if
the warning stops. But then, if you still have the
warning,
turn off the engine and get everyone out of the
vehicle
until it cools down.
You may decide not to lift the hood but to get service
help right away.
I
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Downloaded from www.Manualslib.com manuals search engine The coolant level should be at or above COLD. If it
isn’t, you may have a leak in the radiator hoses, heater
hoses, radiator, water pump or somewhere else in the
cooling system.
NOTICE:
Engine damage from running your engine
without coolant isn’t covered by your warranty.
If there seems to be no leak, with the engine on check to
see if the electric engine fan(s) are running.
If the engine
is overheating, both fan(s) 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 ,coo,lant level
isn’t at or above the COLD mark, add
a 50MI mixture
of clean water (preferably distilled) and a proper
antifreeze at the coolant recovery tank. (%e “Engine
Coolant” in the Index for more information about the
proper coolant mix.)
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Downloaded from www.Manualslib.com manuals search engine In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts. Use
the recommended coolant.
When the coolant in the coolant recovery tank is at or
above the
COLD mark, 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.

Downloaded from www.Manualslib.com manuals search engine 8. Shut the engine off and replace the pressure cap. At
any time during this procedure if coolant begins to
flow out of the filler neck, reinstall the pressure cap.
Be sure the arrows on the pressure cap line up like
this.
How to Add Coolant to the Coolant High
Fill Reservoir -- LTl Only
NOTICE:
The LT1 Engine (Code P) has a specific coolant
high fill reservoir fill procedure. Failure t,o follow
this procedure could cause your engine to
overheat and be severely damaged.
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Downloaded from www.Manualslib.com manuals search engine What to Use What to Use
To add lubricant when the level is low, use Axle
Lubricant (GM Part
No. 12345977) or SAE SOW-90
GL-5 gear lubricant.
To completely refill after draining,
add
4 ounces (1 18 ml) of Limited-Slip Differential
Lubricant Additive (GM Part
No. 1052358). Then fill to
the bottom of the filler plug hole with Axle Lubricant
(GM Part
No. 12345977) or SAE 8OW-90 GL-5 gear
lubricant.
Engine Coolant
The following explains your cooling system and how to
add coolant when it is low.
If you have a problem with
engine overheating or if you need to add coolant to your
high fill reservoir, see “Engine Overheating” in the
Index.
The proper coolant for your Corvette will:
Give freezing protection down to -34°F (-37°C).
Give boiling protection up to 262 “F (128 ” C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights work as they should. Use a mixture
of one-half
clean water (preferably
distilled) and one-half antifreeze that meets
“GM
Specification 1825M,” which won’t damage aluminum
parts.
You can also use a recycled coolant conforming to
GM Specification 1825M with a complete coolant flush
and refill. Use GM Engine Coolant Supplement (sealer)
with any complete coolant flush and refill. If
you use
this mixture, you don’t need to add anything else.
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Downloaded from www.Manualslib.com manuals search engine NOTICE:
If you use an improper coolant mix, your engine
could overheat and be badly damaged. The
repair cost wouldn’t be covered by your
warranty.
Too much water in the mix can freeze
and crack the engine, radiator, heater core and other parts.
Adding Coolant
To Check Coolant
When your engine is cold, check the dipstick on the cap
of the coolant recovery tank. The coolant level should
be at COLD, or a little higher. When your engine is
warm, the level on the dipstick should be up to the HOT,
or a little higher. Your
Corvette also has
a high fill reservoir located at the
right rear of the engine compartment.
If the recovery tank
is very low or empty, also add
coolant to the
high fill reservoir. To add coolant at the
high fill reservoir, see “Engine Overheating” in the
Index.
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Downloaded from www.Manualslib.com manuals search engine To Add Coolant to the Recovery Tank
If you need more coolant, add the proper mix at the
coolant recovery tank,
but only when your engine is
cool. If the tank
is very low or empty, also add coolant
to the coolant high fill reservoir, see “Engine
Overheating” in the Index
for information.
Add coolant mix at the recovery tank, but be careful not
to spill it.
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Downloaded from www.Manualslib.com manuals search engine There are three fuse centers on your vehicle. One is in
the right side of your instrument panel. Turn the knob
and pull the door to access the fuses.
The other two fuse blocks are in the engine
compartment. One
is part of the Forward Lamp wiring
harness
(A), and the other is part of the ECM-Engine
wiring harness
(B).
Look at the silver-colored band inside the fuse. If the
band
is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one
of the correct size.
If you ever have a problem on the road and don’t have a
spare fuse, you can borrow one of the correct value. Just
pick some feature
of your vehicle that you can get along
without
-- like the radio or cigarette lighter -- and use
its fuse, if it is the size you need. Replace it as soon as
you can.
Headlamp Wiring
The headlamp wiring is protected by a circuit breaker in
the switch. An electrical overload will cause the lamps
to
go on and off, or in some cases to remain off. If this
happens, have your headlamp wiring checked right
away.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a
fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools. If
the overload is caused by some electrical problem and
not snow, etc., be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows and other
power accessories. When the current load is too heavy,
the circuit breaker opens and closes, protecting the
circuit until the problem is fixed or goes away.
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