1993 CHEVROLET CORVETTE cooling

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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.

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262
Rear Axle (CONT~)
What to Use:
To add lubricant when the level
use Me Lubricant (GM Part Na
12345977) or SAE BOW-90 GL-5
lubricant. To completely refill after
-draining, add four ounces (118 mQ af
Limited-Slip Dlfferential Lubricant
Additive (GM Part No. 1052358). Zmn
fill to the bottom of the filler plug hole
with Axle ‘Lubricant (GM Part No.
12345977) o,r SAE 8OW-90 GL-5 gear
lubricant.
Engine Coolant
e foUowing explains your cooling
sgstm and how to add coolant when it
is Im. If you have a problem with
e~@e overheating, see the Index under
Engine Ouerheating.
The proper coolant for your Corvette
* Give freezing protection down to
Give boiling protection up. to 262°F
Protect against rust and corrosion.
Help keep the proper engine
Let the warning lights work as they
-3m (-37°C).
(128°C) ~
temperature.
should.
What to Use:
Use a mixture of one-half clean wafer
(preferably distilled) and one-half
antifreeze that
meets “GM Specification
1825-M,” which won’t damage
aluminum parts. You can also use a
recycled coolant conforming to GM
Specification 1825-M with a complete
coolant
flush and refill. If you have the
LTl engine, use GM Engine Coolant
Supplement (sealer)
with any complete
coolant change.
If you use these, you
don’t need to add anything else.

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Adding CooIant-LTI €ngine
(CONT.)
To Add Coolant to the Coolant
Recovery Tank:
For more information on adding coolant
to the LT1 engine, see the Index under
Engine Overheating.
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 the following procedure
and refer to the Index under Engine
Overheating.
264
To Add Coolant to the High Fill
Reservoir:
L
the engine and cooling system are
hot-can allow steam and -scalding
.liquids to blow out and burn you
badly. Never turn the pressure
cap-even a Me-when the engine
and cooling system are hot.
4
NOTICE

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Fuse Usage (CONT.)
Position Rating
(AMP.)
27 5
28 15
29 5
30 10
31 5
32 5
33 5
34 15
35 5
36 5
37 20
38 5
39 5
40 5
41
42 20
43 5
44 15
45 25
Circuit Breakers:
K 30
L
M
N
P
3.0
1 308
Circuitry
Instrument Cluster; Driver Information Center; Supplemental Inflat\
able Restraint (Air Bag) D.E.R.M.; Acceleration
Slip Regulation
Switch
Back-up Lamps Switch Gear Solenoid; Transmission Position Switch
Primary Coaling Fan Relay Coil; Secondary Cooling Fan Relay Coil '
Secondary Butterfly Relay (LT5); Direct Ignition Module; Camshaft Sensor; Traction Buffer; Cannist\
er Purge
Solenoid; Exhaust
Gas Recirculation Control (LT1); Gear Relay (Manual)
Power
Mirror Adjuster Control; Lighted Rearview Mirror; Visor Vanity Mirrors
Cruise Control Engage Switch Daytime Running Lamps Module; Low Tire Pressure Warning Module
Engine Control Module
Supplemental Inflatable Restraint System
Central Control Module
Dome Lamp Relay; Footwell Courtesy Lamps; Do.0~ Cpurtesy Lamps; Glove Compartment Lamps; Lighted Rearview
Mirror
Bose
Amplifier Relay; Power Antenna Relay; Cargo Compartment Lamps
LCD Tone Generator
Central Control Module
2
Radio Receiver Box (Battery); Radio Control Head; Passive Keyless Entry Module
Blank
Power Door Lock Switches
A/C Programmer
Cigar Lighter
Hatch or Deck
Lid Release Relay
4
Power Seats
Blank
Power Windows
Blank
Blank

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r
Capacities and Specifications
Fuel Tank.. ........................................................................\
......................... 20.0. Gal. 75.7 L
Cooling System (LT1) ........................................................................\
... 17.8 quarts 16.9 L
Cooling System (LT5) ........................................................................\
... 14.7 quarts 13.9 L
Refrigerant, Air Conditioning ..................................................=........*....See refrigerant charge label under hood.
Not all air conditioning refrigerants are the same. If the air
conditioning
system in your vehicle needs refrzgerant, be sure the
proper refrigerant is used. If you%e not SU.Y~, ask your Chsvrolet
dealer.
Crankcase; (LT1)
Without Filter Change* ........................................................................\
.4.0 quarts
With Filter Change" ........................................................................\
....... 4.5 quarts
3.8 L
4.3 L
Crankcase (LT5)
Without Filter Change" ........................................................................\
. 7.6 quarts
With Filter Change" ........................................................................\
....... 8.6 quarts
Drain md Refill* ........................................................................\
............ 10.0 pints
@erhaul*
........................................................................\
....................... 2 1.6 pints
Automatic Transmission 7.2
L
8.1 L
4.T r,
10.2 L
Manual Transmission
Overhaul ........................................................................\
........................... 4.4 pints 2.1 L
meel Nut Torque ........................................................................\
.. 100 pound-feet (140 N*m)
Wheel Nut Cap Torque ............................................................... 22 pound-inches (2.5 Nom)
* Recheck fluid level after refill as outlined in Part 6 of this mmual. Brake System--fill at master eyli?ider to '14 inch (6.4 mm) froin top using fluid meeting SAE
1703A (DOT-3) Specifications.
31 I

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fluids & Lubricants
lTEM
Antifreeze
Coo kt ...................................
GM Engine Coolant Supplement ............
(Ethylene Glyc.01 Base)
(LT1 Only)
(Grease Gun Insert)
chassis Lubricant ....................................
Delco Supreme ll@ Brake Fhid .............
DEXROW-IIE Automatic
Transmission Fluid ...............................
C-orvette Manual Transmission Fluid
GM Hydraulic Fluid ................................
Engine OiI .................................................
SAE 5 W-3 0 .............................................
APPLEATION GM PART NUMBER
Year-round antifreeze €or ...........................
Cooling System.. .........................................
coolant mixtures
General chassis lube, etc .............................
Brake System.. . .............................................
Automatic Transmission ............................
1052753
3634621
IO524 .
1052535
12545880
12345881
SIZE
1 gal. (3.7'85 'L)
6 pellets
14 oz. (39:
16 oz. (0.473 L)
16 oz. ('0.473 L)
32 oz. (.0.946 L)
Mmud , ..- T~smi~Sio~ .... +.... .........................
Chtch-Master Cyfiniier ..............................
Engine .........................................................
105293 1
1.2345347 32
oz. (0.946 L)
16 02. (0.473 L)
See the Index under Engine Oil.
317

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...
'Emergencies. Braking ....................... 178
Emergencies. Steering in ................. 180
Emergency Starting .......................... 205
Emergencies on the Road ................. 203
Emergency Towing .......................... 208
Engine Block Heater ......................... 66
Engine
Engine Coolant Temperature
Gage ............................................... 106
Engine Cooling System .................... 262
Engine Exhaust ..................... 79, 80, 200
Coolant .......... 216, 262, 263, 311, 317
Engine Identification ......................... 304
Engine Oil ........................................ 249
Capacity .......................................... 3 1 f
Energy Conserving ......................... 252
Low Oil Light ................................. I X8
Additives ....................................... 253
Checking 81 Adding .............. 249. 250
Disposing of Used Oil .................... 254
Pressure Gage ............................... 103
Substitute ........................................ 253
Temperature Gage ......................... 104
When to Change ............................. 253
Engine Oil Life Monitor .................. 109
Engine Overheating ......................... 213
160
Engine Power Curves ....................... 319
Engine Power Key ............................. 56
Engine Power Switch ........................ 74
Engine Specifications ....................... 313
Engine, starting
Automatic Transmission ................. 63
Manual Transmission ..................... 65
Ethanol in Gasoline .......................... 242
Exhaust
Dangerous Gas in ....... 59, 79,80, 200
Parking with the.Engine
Expectant Mothers, Use of
Expressway Driving ......................... 191
Extender, Safety Belt .......................... 37
Exterior Appearance
Running ............................ 67, 78, 80
.Safety Belts ...................................... 31
(see Appearance Care)
Rbric cleaning
(see Appearance Care)
Fabric Protection ............................. 291
Fan Warnings ........... 206, 207, 215, 246
Fiberglass Springs ............................ 303
Filliig the Fuel Tank ....................... 244
Filter
Air Cleaner ............................. 254, 312
Oil ........................................... 253, 312
Finish. Damage ................................... 302
Flashers, Hazard
Warning ......................................... 204
Flat Tire ............................................ 224
Storing a .Flat-& cept ZR-l .......... 233
StoMg a .Flat-Z R-1 ..................... 234
Flooded Engine ............................ 62, . 64
System ............................................ 145
Capacities ....................................... 311
Hydraulic Clutch ............................. 260
Power Steering .............................. -269
Rear Axle ................................ 261, 318
Windshield Washer .......... 84,269, 318
plow-Through Ventilation
Pluid
Brake ..................................... 270, 317
Transmission ................. 256, 311, 317
Fluids & Lubricants ........................ 317
Fog, Driving in ................................ 189
Fog Light Bulb Replacement ... 275, 314
Freeway Driving ............................... 191
Fog Lights ............................................ 92