1994 CHEVROLET CORVETTE Owners Manual

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When you open the hood, you'll see:
1. Hydraulic Clutch Fluid Reservoir (if
2. Brake Fluid Reservoir
equipped)
. . .I76
1
Before closing the hood, be sure all
the filler caps are on.
'*?-
5.7L LTI (Code P)
3. Battery
4. Electrical Engine Fan
5. Air Cleaner
6. Coolant Recovery Tank
7. Power Steering Fluid Reservoir
8. Engine Oil Fill Cap
9. Engine Oil Dipstick
10. Windshield Washer Fluid Reservoir
11. Coolant High Fill Reservoir
12. Automatic Transmission Dipstick
(if equipped)
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"1
5.7L LT5 (Code J)
When you open the hood, you'll see:
1. Hydraulic Clutch Fluid Reservoir 5. Air Cleaner
2. Brake Fluid Reservoir 6. Coolant Recovery Tank
3. Battery 7. Power Steering Fluid Reservoir
4. Electric Engine Fan 8. Engine Oil Fill Cap Before closing
the hood, be
sureall
the filler caps are on. . ..
'., , ,.
9. Engine Oil Dipstick
10. Windshield Washer Fluid Reservoir
11. Coolant High Fill Reservoir
177..

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Then release the hood strut by moving it
to the centered position and lowering the
hood. Lower the hood until it is about
12
inches (300 mm) above the engine, then
release it.
- - 178
I
!
5.7L LTl (Code P)
Engine Oil
If you have the LTl engine, it’s a good
idea to check your engine oil level every
time you get fuel. In order to get an
accurate reading, the oil must be warm
and the vehicle must be on level ground.
Turn off the engine and give the oil a few
minutes to drain back into the oil pan.
If
you don’t, the oil dipstick might not show
the actual level. d
tl
It
rain
le oi
:vel.
5.7L LT5 (Code J)
f you have the LT5 engine, the best time
3 check your engine oil is when the
ngine is cold. If you run the engine, the
ngine oil won’t drain back into the pan
ast enough. Give the oil two hours to
back into the oil pan. If you don’t,
1 dipstick might not show the actual

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To Check Engine Oil
Pull out the dipstick and clean it with a
paper towel or cloth, then push it back
in
all the way. Remove it again, keeping the
tip lower.
5.7L LTl (Code E
When to Add Oil:
If the oil is at or below the “ADD’ mark,
you’ll need to add some oil. But you musl
use the right kind. This section explains
what kind
of oil to use. For crankcase
capacity, see “Capacities and
Specifications” in the Index.
NOTICE:
Don’t add too much oil. If your
engine has
so much oil that the oil
level gets above the upper mark that
shows the proper operating range,
your engine could be damaged.
5.7L LT5 (Code J)
Just fill it enough to put the level
somewhere
in the proper operating range.
Push the dipstick all the way back
in
when you’re through.
What Kind of Oil to Use
Look for two things:
GM4718M
The Corvette engine requires a special
oil meeting GM Standard GM47 18M.
Oils meeting this Standard may be
identified as synthetic. However, not
all SYNTHETIC oils will meet this
GM Standard. You should look
for
and use only an oil that meets GM
Standard GM47 18M.
179 ...

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I
NOTICE:
If you use oils that don’t have the
GM4718M Standard designation,
you can cause engine damage not
covered by your warranty.
0 SAE 5W-30
As shown in the viscosity chart,
SAE 5W-30 is best for your
vehicle. However, you can use
SAE 1OW-30 if it’s going to be
0°F (-18°C) or above.
These numbers
on an oil container
show its viscosity, or thickness.
Do
not use other viscosity oils such as
SAE 20W-50.
. .I80
Recommended SAE Viscosity
Grade Engine Oils
For best fuel economy and cold starting,
.select the lowest SAE viscosity grade oil
for the expected temperature range.
HOT
WEATHER
/
WEATHER
r
COLD
WOK FOR
LABELS
ONE OFTHESE @
1
-r
SAEZ-30
PREFERRED
Oils meeting these requirements should
also have either one or both of these
symbols
on the container.
You should look for these
on the oil
container, and use
o& those oils that
are identified as meeting GM Standard
4718M and have either the “starburst”
symbol or the
API doughnut symbol
with either the
SH or the SG designation.
Your Corvette engine is filled at the
factory with a Mobil
l@ synthetic oil,
which meets all requirements for your
vehicle.

Downloaded from www.Manualslib.com manuals search engine Substitute Oil (LT1 Only): When adding
oil to maintain engine oil level, if an oil
meeting GM Standard GM4718M is not
available, you can use oil designated
either
SAE 5W-30 API Service SH or SG
at all temperatures, or
SAE 1OW-30 API
Service
SH or SG at temperatures above
0°F (-18°C). This oil should not be used
for an oil change.
Substitute Oil (LT5 Only): When adding
oil to maintain engine oil level, if an oil
meeting
GM Standard GM4718M is not
available, you can use oil designated SAE
1OW-30 API Service SH or
SG at all
temperatures. This oil should not be used
for an oil change.
Engine Oil Additives
Don’t add anything to your oil. Your
Chevrolet dealer is ready to advise if you
think something should be added.
When to Change Engine Oil
See if any one of these is true for you:
Most trips are less than 4 miles
It’s below freezing outside and most
trips are less than
10 miles (16 km).
(6 km).
The engine is at low speed most of
the time (as
in stop-and-go traffic).
Most trips are through dusty places.
If any one of these is true for your
vehicle, you need to change your oil and
filter every 3,000 miles
(5 000 km) or
3 months
- whichever comes first.
(See “Engine Oil Life Monitor” in the
Index.)
If none of them is true, change the oil
every 7,500 miles
( 12 500 km) or 12
months
- whichever comes first. Change
the filter at the first oil change and at
every other oil change after that. (See
“Engine Oil Life Monitor” in the Index.)
Engine Coolant Heater (Engine Block
Heater)
An engine coolant heater can be a big
help if you have to park outside in very
cold weather,
0 “F (- 18 “C) or colder. If
your vehicle has this feature, see “Engine
Coolant Heater” in the Index.
What to Do with Used Oil
Did you know that used engine oil
contains certain elements that may be
unhealthy for your skin and could even
cause cancer? Don’t let used oil stay on your
skin for very long. Clean your skin
and nails with soap and water, or a good
hand cleaner. Wash or throw away
clothing or rags containing used engine
oil. (See the manufacturer’s warnings
about the use and disposal of oil
products.)
Used oil can be a real threat to the
environment. If you change your own oil,
be sure to drain all free-flowing oil from
the filter before disposal. Don’t ever
dispose of oil by putting it in the trash,
pouring it on the ground, into sewers, or
into streams or bodies of water. Instead,
recycle
it by taking it to a place that
collects used oil. If you have a problem
properly disposing of your used oil, ask
your dealer, a service station or
a local
recycling center for help. L 1
181 ...

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5.7L LT1 (Code P)
Air Cleaner
Refer to the Maintenance Schedule to
determine when to replace the air filter.
See “Scheduled Maintenance Services” in
the Index.
. . .182
5.7L LT5 (Code J)
NOTICE:
If the air cleaner is off, a backfire can
cause a damaging engine fire. And,
dirt can easily get into your engine,
which will damage it. Always have
the air cleaner in place when you’re
driving.

Downloaded from www.Manualslib.com manuals search engine Air Filter Replacement
To remove the air filter:
1. Unscrew the three knobs.
1. Pull the air cleaner straight up. ?,
1. ODen the air cleaner and remove the
fiiter.
183..
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