1998 CHEVROLET CORVETTE coolant temperature

Downloaded from www.Manualslib.com manuals search engine When adjusting the temperature, start with a driver-set
temperature of
73°F (23 "C) until you determine your
comfort zone. If you choose
60°F (16"C), the system
will remain at maximum cooling and will not
automatically adjust fan speed or air delivery. If you
choose
90°F (32"C), the system will remain at
maximum heating and will not automatically adjust fan
speed or air delivery. Choosing either maximum setting
will not cause the system to heat or cool any faster.
Turning the knob past either maximum setting has no
effect on the operation of the system.
Passenger Temperature Offset
The PASSENGER knob changes the temperature on the
passenger's side of the vehicle. When the knob is in the
12 o'clock position, the passenger's temperature is the
same as the driver's. Turn the knob to the right for
warmer air
on the passenger's side, to the left for cooler
air. If the driver-set temperature is set at
60°F (1 6 " C) or
90 OF (32 " C), turning the passenger knob has no effect
because the system is locked at a maximum setting.
Automatic Operation
Press the AUTO button to place the entire system in the
automatic mode. After a five second display of the current settings, only the word
AUTO and the outside
temperature will be shown on the digital display. The
system will operate to achieve your comfort set
temperature as quickly as possible. If you have set the
driver temperature at
60°F (16°C) or 90°F (32"C), the
system will not operate automatically until a different
temperature is selected. The AUTO control system
works best with the windows up and the removable roof
installed or the convertible top up.
A Typical Cold Weather Example:
Your vehicle has been parked outside overnight in cold
weather (below
32 OF/ 0 " C) and you have set the driver
temperature at
73°F (23°C) and have selected the AUTO
mode. The system will automatically adjust the
temperature output to maximum heating. The fan will start
at a low speed. This is to avoid blowing cold
air into the
vehicle. The length of the delay depends on the amount of
time since the engine was last started, the outside
temperature and the engine coolant temperature. As the
coolant warms up, the fan speed will gradually increase.
Air will flow to the floor with some air to the windshield
to prevent fogging under most normal conditions.
3-5

Downloaded from www.Manualslib.com manuals search engine Air Conditioning Heating
On
very hot days, your vehicle will cool down more
quickly and economically if you open the windows long
enough to let hot inside
air escape. Then keep your
windows closed in order to allow the air conditioning to
work best. Maximum cooling will occur when the
RECIRCULATE setting is operating, airflow direction is
in the upper mode, and the temperature control knob (on
a manual climate control system) is turned all the way to
the blue area. These settings will be selected by the
Automatic Electronic Dual Climate Control System if
operating in AUTO when maximum cooling is required.
When the air conditioning is on, you may sometimes
notice slight changes in your vehicle’s engine
performance and power. This is normal. The system is
designed to .help fuel economy while maintaining the
desired cooling level.
The
air conditioning removes moisture from the air, so you
may notice water dripping fi-om under your vehicle when
it is idling or after it has been turned
off. This is normal. The
heater works best
if you keep your windows closed.
Maximum heating will occur when airflow direction is
in the lower mode and the temperature control knob (on
a manual climate control system) is all the way
in the
red area. These settings will be selected by the
Automatic Electronic Dual Climate Control System if
operating in AUTO when maximum heating is required.
The BI-LEVEL setting is designed for use on sunny days
when the
air is only moderately warm or cool. On days
like these, the sun may adequately warm your upper body,
but your lower body may not
be warm enough. The
BI-LEVEL setting will direct cooler airflow to
your upper
body and warmer
air to the floor area.
If you have the optional engine coolant heater and use it
during cold weather
0°F (- 18 “C) or lower, your heating
system will provide heat more quickly because the
coolant is already warmed. See “Engine Coolant Heater”
in the Index.
3-10

Downloaded from www.Manualslib.com manuals search engine Engine Overheating
You will find an engine coolant temperature gage on the
instrument cluster and a COOLANT OVER TEMP
message on the Driver Information Center
(DIC).
Overheated Engine Protection
Operating Mode
Should a low coolant condition exist and the messages
COOLANT OVERTEMP and REDUCED ENGINE
POWER are displayed, along with the Check Engine
light, an overheat protection mode which alternates
firing groups of four cylinders helps prevent engine
damage. In this mode, you will notice a loss in power
and engine performance. This operating mode allows
your vehicle to be driven to a safe place in an
emergency; you may drive up
to 50 miles (80 km).
1 NOTICE:
After driving in the overheated engine protection
operating mode, to avoid engine damage, allow
the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair
the cause of coolant loss, change the oil and reset
the oil life monitor. See “Engine Oil, When to
Change” in the Index.
5-13

Downloaded from www.Manualslib.com manuals search engine How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise
the level to the bottom of the filler plug hole.
What to Use
To add lubricant when the level is low, use Axle
Lubricant (GM Part
No. 12345977) or SAE 8OW-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 cooling s stem in your vehicle is filled with
DEX-COOL engine coolant. This coolant is designed
to remain in your vehicle for
5 years or 150,000 miles
(240 000 km) whichever occurs first, if you add only
DEX-COOL’ extended life coolant.
The following explains your cooling system and how
to add coolant when it is low. If you have a problem
with engine overheating, see “Engine Overheating” in
the Index.
A
50/50 mixture of water and DEX-COOL@
coolant will:
0 Give freezing protection down to -34°F (-37°C).
8
0 Give boiling protection up to 265 “F (129” C).
Protect against rust and corrosion.
0 Help keep the proper engine temperature.
Let the warning lights and gauges work as
they should.
6-22

Downloaded from www.Manualslib.com manuals search engine Surge Tank Pressure Cap
NOTICE:
The surge tank pressure cap is a 15 psi (105 kPa)
pressure-type cap and must be tightly installed to prevent coolant
loss and possible engine damage
from overheating.
When you replace the surge tank pressure cap, a GM cap
is recommended.
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches a pre-set temperature.
When you replace the thermostat, a GM thermostat
is recommended.
Power Steering Fluid
When to Check Power Steering Fluid
It is not necessary to regularly check power steering fluid
unless you suspect there is a leak
in the system or you hear
an unusual noise. A fluid loss in this system could indicate
a problem. Have the system inspected
and repaired.

Downloaded from www.Manualslib.com manuals search engine Capacities and Specifications
Engine
vpe .................................... V8
VIN Engine Code
LSl ...................................... G
Fuel Delivery ............ Sequential Multi-Port
Fuel Injection (SFI)
Valve Arrangement ............. Overhead Valve
Piston Displacement ...................... 5.7L
Bore ...................... 3.90 inches (9.9 cm)
Stroke .................... 3.62 inches (9.2 cm)
Compression Ratio
LSl ................................ 10.1:l
Horsepower
LS1 .................................. 345
Firing Order .................. 1-8-7-2-6-5-4-3
Thermostat Temperature
Specification
................... 187°F (86°C)
Replacement Parts
Air Cleaner Filter ...................... A917C
Battery ............................. 78A-72H
Coolant Surge Tank Cap ... GM Part No. 10296465
15 psi (105 kPa)
Engine Oil Filter ........................ PF44
PCV Valve ............................. 799C
Serpentine Belt
AC Compressor
......... GM Part No. 12556609
or equivalent
Water Pump, Generator, Power Steering Pump
... GM Part No. 12555225
Spark Plug ............. 41-93 1 (0.60 inch Gap) or equivalent
Thermostat ............. GM Part No. 12555717
or equivalent
Windshield Wiper Blade
Length ................... .22 inches (55.9 cm)
Type
............ 9 mm x 3 mm Shephard’s Hook
6-70

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
100,000 Miles (160 000 km) (Continued)
0 Change automatic transmission fluid and filter if the vehicle is mainly driven
under one or more of these conditions:
- In heavy city traffic where the outside temperature regularly reaches 90°F
(32 O C) or higher.
- In hilly or mountainous terrain.
- Uses such as high performance operation.
Manual transmission fluid doesn’t require change.
0 If you haven’t used your vehicle under severe conditions listed previously and,
therefore, haven’t changed your automatic transmission fluid, change
both the
fluid and the filter. Manual transmission fluid doesn’t require change.
150,000 Miles (240 000 km)
0 Drain, flush and refill the cooling system (or every 60 months since last
service, whichever occurs first). See “Engine Coolant” in the Index for
what to use.
An Emission Control Sewice.
DATE I
MILEAGE
7-10
I

Downloaded from www.Manualslib.com manuals search engine Player ...................................... 3-17
Care
....................................... 3-29
Competitive Driving
............................ 2-24
Console. Center
........................... .. .... 2-55
Control of a Vehicle
.............................. 4-5
Convenience Net
............................... 2-57
Convenience Net. Cleaning
....................... 6-54
Convertible Top
................................ 2-68
Convex Outside Mirror
.......................... 2-54
Coolant
............................. 5.13.5.16. 6.22
SurgeTank
.................................. 5-18
Surge Tank Pressure Cap
....................... 6-26
Coolant Heater. Engine
.......................... 2-24
CoolingSystem
................................ 5-16
Courtesy Lamps
................................ 2-52
InCanada
.................................... 8-8
1ntheU.S. ................................... 8-8
Cruise Control ................................. 2-47
Customer Assistance for Text Telephone Users
......... 8-4
Customer Assistance Infomation
................... 8- 1
Customer Satisfaction Procedure .................... 8-2
Damage. Finish
............................... 6-59
Daytime Running Lamps
......................... 2-50
Dead Battery
................................... 5-3
Defects. Reporting Safety
........................ 8- 10
InCanada
................................... 8-11
To General Motors
............................ 8- 11
Defensive Driving
............................... 4-2
Defogger. Rear Window
......................... 3- 11
Defogging ............................ 3-3.3-7. 3-11
Defrosting ................................ 3-3. 3-11
Dimensions. Vehicle
............................ 6-7 1
Dolby B Noise Reduction ........................ 3-16 Door
Locks
....................................... 2-4
Downshifting
.................................. 2-31
Driver Information Center (DIC)
................... 2-87
Warnings and Messages
........................ 2-97
Controls and Displays
......................... 2-88
ABS active
.................................. 2-98
Charge System Fault
.......................... 2-99
Coolant Over Temp
.......................... 2- 101
Flat Tire
. (lf. lr. rf. rr) ........................ 2-104
High Oil Temperature Reduce Engine rpm
........ 2- 102
High Tire Pressure
. (If. lr. rf. rr) ................ 2-105
High Trans Temp
............................ 2- 102
Low Coolant
................................ 2- 101
LowOilLevel ............................... 2-99
Low
Oil Pressure ............................. 2-98
Low Tire Pressure
. (If. lr. rf. rr) ................ 2-103
Maximum Speed
80 mph (129 Wh) ............ 2-101
Reduced Engine Power
........................ 2-99
ServiceABS
................................. 2-98
Service Column Lock
.......................... 2-98
Service Ride Control
......................... 2- 101
Service Tire Monitor (MON) System (SYS) ....... 2-106
Service Traction System
...................... 2-100
Service Vehicle Soon
.......................... 2-99
Shocks Inoperative
........................... 2- 10 1
Traction System
- OFF ....................... 2-100
Traction System
- ON ........................ 2-100
Traction System
(SYS) Active .................. 2-100
Driver Position
................................. 1-11
Driving
........................................ 4-1
City
........................................ 4-19
Defensive
.................................... 4-2
Driver Information Center
(DIC) Messages
9-3