1994 CHEVROLET CORVETTE Owners Manual

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
F
Cooling System
When you decide it’s safe to lift the hood,
here’s what you’ll see on the
LT5 engine:
1. Coolant recovery tank
2. Coolant high fill reservoir with
3. Electric engine fans
pressure cap
. . -152
If
the coolant inside the coolant recovery
tank is boiling, don’t do anything else
until it cools down.
When it is cool, remove the coolant
recovery tank cap and look at the dipstick.
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.
I NOTICE:
I
Engine damage from running your
engine without coolant isn’t covered
by your warranty.
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.

Downloaded from www.Manualslib.com manuals search engine 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 the
“COLD, mark, add a
50150 mixture of
clean water (preferably distilled) and a
proper antifreeze at the coolant recovery
tank. (See “Engine Coolant” in the Index
for more information about the proper
coolant
mix.)
NOTICE:
I
In cold weather, water can freeze and
crack
the engine, radiator, heater core
and other parts. Use the recom-
mended 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.
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Downloaded from www.Manualslib.com manuals search engine Problems on the Road
How to Add Coolant to the Coolant
High
Fill Reservoir - LT1 Only
NOTICE:
I
The LT1 engine (Code P) has a
specific coolant high fill reservoir
fill procedure. Failure to follow this
procedure could cause your engine to
overheat and be severely damaged.
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 pressure 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.
. . .I54

Downloaded from www.Manualslib.com manuals search engine 2. Then keep turning the pressure cap, but now push down
as you turn it.
Remove the pressure cap.
3. After the engine cools, open the air
bleed valves on the throttle body.
. .
. . . and water pump inlet.
, i... I.
m
155. ..

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
4.
5.
6.
7.
8.
Fill with the proper mix. Add coolant
until you see a steady stream of
coolant coming from the bleed valves.
Close the bleed valves.
Continue to fill the coolant high fill
reservoir up to the base of the filler
neck.
Rinse or wipe the spilled coolant from
the engine and compartment.
Start the engine and allow it to run in
idle for approximately four minutes.
By this time, the coolant level inside
the coolant high fill reservoir will be
lower. Add more of
the proper mix
through the filler neck until the level
reaches the base
of the filler neck.
9. Shut the engine off and replace the
pressure cap. Be sure the arrows on
the pressure cap line up like this. 10. Then fill the coolant recovery tank
For a complete drain, flush and refill,
see your Chevrolet dealer or a Chevrolet
Corvette Service Manual.
To purchase a
service manual, see “Service
Publications’’ in the Index. to
the proper level.
. . .156

Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Coolant
High Fill Reservoir
(5.7L LT5 (Code J)
Engine)
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 pressure 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.
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.
157 ...

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
4. Then fill the coolant recovery tank to
the “HOT” mark
on the dipstick.
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 run until
you 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
through the filler neck until the level
reaches the base of the filler neck.
. . .158

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 cap line up like this.
If a Tire Goes Flat
It’s unusual for a tire to “blow out” while
you’re driving, especially if you maintain
your tires properly. If air goes out of a
tire, it’s much more likely
to’ leak out
slowly. But
if you should ever have a
”blowout,” here are a few tips about
what to expect and what to do:
If a front tire fails, the flat tire will create
a drag that pulls the vehicle toward that
side. Take your foot off the accelerator
pedal and grip the steering wheel firmly.
Steer
to maintain lane position, then
gently brake to a stop well out of the
traffic lane.
A rear blowout, particularly on a curve,
acts much like a skid and may require the
same correction you’d use in a skid. In
any rear blowout, remove your foot from
the accelerator pedal. Get the vehicle
under control by steering the way you
want the vehicle to go.
It may be very
bumpy and noisy, but you can still steer.
Gently brake to a stop, well qff the road
if possible.
If a tire goes flat, the next section shows
how to use your jacking equipment to
change a flat tire safely. If your vehicle
has Extended Mobility Tires (tires with
“EMT” molded on the sidewalls), see
“Extended Mobility Tires” in the Index.
Changing a Flat Tire
If a tire goes flat, avoid further tire
damage by driving slowly to a level place.
Turn on your hazard warning flashers.
159 ...