2007 CADILLAC SRX engine overheat

Overheated Engine Protection
Operating Mode
This operating mode allows your vehicle to be
driven to a safe place in an emergency. Should an
hot engine condition exist, an overheat protection
mode which alternates ring groups of cylinders
helps prevent engine damage. In this mode, there is
a loss in power and engine performance. Driving
extended miles (km) and/or towing a trailer in the
overheat protection mode should be avoided.
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 and change the oil. SeeEngine Oil on
page 360.
Cooling System
When you decide it is safe to lift the hood, here is
what you will see:
A. Electric Engine Cooling Fans
B. Coolant Surge Tank and Pressure Cap
Some vehicles may be equipped with an
engine driven fan, as well as the electric
pusher fans (A) which are located behind the
vehicle’s grille.
3.6L V6 shown, 4.6L V8 similar
374

{CAUTION:
An electric engine cooling fan under the
hood can start up even when the engine
is not running and can injure you. Keep
hands, clothing, and tools away from any
underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
When the engine is cold, the coolant level should
be at or slightly above the FULL COLD/FROID line
on the side 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 fans
are running. If the engine is overheating, both fans
should be running. If they are 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 374for information on
driving to a safe place in an emergency.
375

{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.
{CAUTION:
You can be burned if you spill coolant on
hot engine parts. Coolant contains
ethylene glycol and it will burn if the
engine parts are hot enough. Do not spill
coolant on a hot engine.
If no coolant is visible in the surge tank, add
coolant as follows:
1. You can remove the coolant surge tank
pressure cap when the cooling system,
including the coolant surge tank pressure cap
and upper radiator hose, is no longer hot.
Turn the pressure cap slowly counterclockwise
(left) about one-quarter turn and then stop.
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
377

Engine
Air Cleaner/Filter...................................... 365
Battery..................................................... 385
Check and Service Engine Soon Light..... 208
Coolant.................................................... 368
Coolant Heater......................................... 121
Coolant Temperature Gage...................... 207
Coolant Temperature Warning Light.......... 206
Drive Belt Routing.................................... 483
Engine Compartment Overview................ 356
Exhaust................................................... 132
Oil ........................................................... 360
Oil Life System........................................ 363
Overheated Protection Operating Mode.... 374
Overheating............................................. 372
Speed Limiter.......................................... 199
Starting.................................................... 119
Entry Lighting.............................................. 182
Event Data Recorders (EDR)...................... 498
Extender, Safety Belt..................................... 42
Exterior Lighting Battery Saver.................... 181F
Filter
Engine Air Cleaner................................... 365
Finish Damage............................................ 451
Flashers, Hazard Warning........................... 166
Flash-to-Pass.............................................. 169
Flat Tire...................................................... 423
Flat Tire, Changing...................................... 424
Flat Tire, Storing......................................... 439
Fluid
Automatic Transmission............................ 367
Power Steering........................................ 379
Windshield Washer.................................. 380
Fog Lamp Light........................................... 212
Fog Lamps.................................................. 181
Front Axle................................................... 395
Fuel............................................................ 349
Additives.................................................. 350
California Fuel.......................................... 350
Filling a Portable Fuel Container.............. 354
Filling Your Tank...................................... 352
Fuels in Foreign Countries....................... 351
512

Mirrors
Automatic Dimming Rearview
with OnStar
®........................................ 134
Automatic Dimming Rearview
with OnStar
®and Compass.................. 134
Outside Automatic Dimming Mirror........... 138
Outside Convex Mirror............................. 139
Outside Curb View Assist Mirror............... 138
Outside Power Heated Mirrors................. 137
MP3 ............................................................ 257
MyGMLink.com............................................ 490
N
Navigation/Radio System,
see Navigation Manual............................. 266
New Vehicle Break-In.................................. 116
Normal Maintenance Replacement Parts..... 482
O
Odometer.................................................... 199
Off-Road Driving.......................................... 291
Off-Road Recovery...................................... 287Oil
Engine..................................................... 360
Pressure Light.......................................... 211
Oil, Engine Oil Life System ......................... 363
Older Children, Restraints............................. 43
Online Owner Center................................... 490
OnStar
®System, see OnStar®Manual........ 139
Operation, Universal Home Remote
System............................................144, 150
Other Warning Devices................................ 166
Outlet Adjustment........................................ 194
Outlet(s), Accessory Power.......................... 186
Outside
Automatic Dimming Mirror........................ 138
Convex Mirror.......................................... 139
Curb View Assist Mirror........................... 138
Power Heated Mirrors.............................. 137
Overheated Engine Protection
Operating Mode....................................... 374
Owner Checks and Services....................... 476
Owners, Canadian.......................................... 3
516