2007 CHEVROLET CORVETTE engine overheat

If you no longer have the overheat warning,
you can drive. Just to be safe, drive slower for
about 10 minutes. If the warning does not
come back on, you can drive normally.
If the warning continues and you are not
stopped, pull over, stop, and park your vehicle
right away.
If there is still no sign of steam, you can idle the
engine for three minutes while you are parked.
If you still have the warning, turn off the engine
and get everyone out of the vehicle until it
cools down. Also, see “Overheated Engine
Protection Operating Mode” later in this section.
You may decide not to lift the hood but to get
service help right away.Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
messages COOLANT OVER TEMPERATURE
and REDUCED ENGINE POWER are displayed,
along with the Check Engine light, an overheat
protection mode which alternates ring groups of
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).
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
system. SeeEngine Oil on page 333.
352

The coolant level should be at the FULL COLD
mark on the front of the coolant surge tank. If it is
not, you may have a leak at the pressure cap or in
the radiator hoses, heater hoses, radiator, water
pump or somewhere else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other
engine parts, can be very hot. Do not
touch them. If you do, you can be burned.
Do not run the engine if there is a leak.
If you run the engine, it could lose all
coolant. That could cause an engine re,
and you could be burned. Get any leak
xed before you drive the vehicle.
If there seems to be no leak, with the engine on,
check to see if the electric engine cooling fan is
running. If the engine is overheating, the fan should
be running. If it is not, your vehicle needs service.Notice:Engine damage from running your
engine without coolant is not covered by your
warranty. SeeOverheated Engine Protection
Operating Mode on page 352for information
on driving to a safe place in an emergency.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core,
or radiator corrosion. In addition, the engine
coolant could require changing sooner,
at 30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would
not be covered by your warranty. Always
use DEX-COOL
®(silicate-free) coolant in
your vehicle.
How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check
to see if coolant is visible in the surge tank.
If coolant is visible but the coolant level is not
at the FULL COLD mark on the front of the
coolant surge tank, add a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant at
354

the coolant surge tank, but be sure the cooling
system, including the coolant surge tank pressure
cap, is cool before you do it. SeeEngine
Coolant on page 347for more information.
If no coolant is visible in the surge tank, add
coolant as follows:
{CAUTION:
Steam and scalding liquids from a hot
cooling system can blow out and burn
you badly. They are under pressure, and if
you turn the coolant surge tank pressure
cap — even a little — they can come out
at high speed. Never turn the cap when
the cooling system, including the coolant
surge tank pressure cap, is hot. Wait
for the cooling system and coolant
surge tank pressure cap to cool if you
ever have to turn the pressure cap.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can
boil before the proper coolant mixture will.
Your vehicle’s coolant warning system is
set for the proper coolant mixture. With
plain water or the wrong mixture, your
engine could get too hot but you would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.
Notice:In cold weather, water can freeze and
crack the engine, radiator, heater core and
other parts. Use the recommended coolant
and the proper coolant mixture.
355

Engine
Air Cleaner/Filter...................................... 342
Check and Service Engine Soon Light..... 200
Coolant.................................................... 347
Coolant Heater.......................................... 93
Coolant Temperature Gage...................... 199
Drive Belt Routing.................................... 446
Engine Compartment Overview................ 330
Exhaust................................................... 106
Oil ........................................................... 333
Oil Life System........................................ 340
Oil Pressure Gage................................... 204
Overheated Protection Operating Mode.... 352
Overheating............................................. 350
Running While Parked............................. 107
Starting...................................................... 91
Entry/Exit Lighting....................................... 173
Event Data Recorders................................. 470
Extended Mobility Tires............................... 384
Extender, Safety Belt..................................... 30
Exterior Lamps............................................ 168
Exterior Lighting Battery Saver.................... 172F
Filter
Engine Air Cleaner................................... 342
Finish Damage............................................ 415
Flashers, Hazard Warning........................... 158
Flash-to-Pass.............................................. 162
Flat Tire...................................................... 406
Floor Mats................................................... 130
Fluid
Automatic Transmission............................ 345
Manual Transmission................................ 345
Power Steering........................................ 358
Windshield Washer.................................. 360
Fog Lamp
Fog .......................................................... 171
Fog Lamp Light........................................... 205
Fuel............................................................ 321
Additives.................................................. 323
California Fuel.......................................... 322
Filling a Portable Fuel Container.............. 327
Filling Your Tank...................................... 324
478

O
Odometer.................................................... 190
Off-Road Recovery...................................... 289
Oil
Engine..................................................... 333
Engine Oil Pressure Gage....................... 204
Oil, Engine Oil Life System......................... 340
Older Children, Restraints............................. 31
One-to-Four Shift Light................................ 195
Online Owner Center................................... 455
OnStar, Privacy........................................... 471
OnStar
®System, see OnStar®Manual........ 114
Operation, Universal Home
Remote System..............................119, 123
Other Warning Devices................................ 159
Outlet Adjustment........................................ 186
Outlets
Accessory Power..................................... 178
Outside
Automatic Dimming Mirror........................ 113
Convex Mirror.......................................... 114
Power Heated Mirrors.............................. 113
Overheated Engine Protection
Operating Mode....................................... 352
Owner Checks and Services....................... 438
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 415
Park (P)
Shifting Into............................................. 103
Shifting Out of......................................... 104
Parking
Brake....................................................... 102
Over Things That Burn............................ 105
Parking Your Vehicle................................... 105
Passenger Airbag Status Indicator............... 192
Passenger Compartment Air Filter............... 186
Passenger Position, Safety Belts................... 30
Passenger Sensing System........................... 59
Passing....................................................... 289
Power
Door Locks................................................ 80
Electrical System..................................... 419
Lumbar and Side Bolsters........................... 9
Retained Accessory (RAP)......................... 91
Seat............................................................ 8
Steering Fluid.......................................... 358
Windows.................................................... 86
Pretensioners, Safety Belt............................. 30
483