engine overheat CADILLAC SEVILLE 1994 4.G User Guide

Downloaded from www.Manualslib.com manuals search engine Engine Cooling When Trailering
Your cooling system may temporarily overheat during severe operating
conditions such as;
Climbing grades steeper than 4% at ambient temperatures above
90 Fahrenheit (32O Celsius) with a loaded vehicle and trailer.
I_ Stopping after high-speed driving.
0 Idling for long periods in stop and go traffic.
If “ENGINE HOT A/C COMPRESSOR
OFF” message appears on the
Driver Information Center, do not be alarmed. This is a normal function
designed to reduce the load
on the engine and cooling system. You can
continue to drive your vehicle.
If “ENGINE COOLANT HOT IDLE ENGINE’’ message appears on
the Driver Information Center, pull off to the side of the road as soon as
it is safe to do
so. When the vehicle is at a complete stop, shift the
the engine or increase engine speed above a normal idle. Within
two or
three minutes the system should cool sufficiently to allow A/C operation
normal driving after
10 minutes if the “ENGINE COOLANT HOT
IDLE ENGINE” message is not displayed.
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transaxle selector to P (Park) and allow the engine to idle. Do not turn off
__ to resume. At that time resume driving at a reduced speed. Return to
__
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re pulling a trailer.
especially important
in trailer operation are automatic transaxle fluid
(don’t overfill), engine oil, belts, cooling system, and brake wear Each of
.- these is covered in this manual, and the Index will help you find them
quickly.
If you’re trailering, it’s a good idea to review these sections
before
you start your trip.
~ See the Maintenance Schedule for more on this. Things that are
- Check periodically to see that all hitch nuts and bolts are tight.
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Downloaded from www.Manualslib.com manuals search engine ENGINE OVERHEATING
You will find the warning light about a hot engine on your instrument
panel on Canadian and Export vehicles. The Driver Information Center
will display either “ENGINE
COOLANT HOT IDLE ENGINE’ or
“STOP ENGINE ENGINE OVERHEATING”.
If Steam Is Coming From Your Engine
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Downloaded from www.Manualslib.com manuals search engine -.
NOTICE:
If your engine catches fire because you keep driving with no
coolant, your vehicle can be badly damaged. The costly repairs \
would not be covered by
your warranty.
IfNo Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no steam, the problem
may not be too serious. Sometimes the engine can get a little too hot
when you:
Climb a long hill on a hot day.
Stop after high speed driving.
Idle for long periods in traffic.
Tow a trailer.
If you get the overheat warning
with no sign of steam, try this for a
minute or
so:
1. Turn off your air conditioner.
2. Turn on your heater to full hot at the highest fan speed and open the
3. Dial temperature control to the highest heat setting and open the
window as necessary.
window, as necessary.
4. Try to keep your engine under load (in a drive gear where the engine
runs slower).
If you no longer have the overheat warning, you can drive. Just
to be safe,
drive slower for about ten minutes.
If the warning doesn’t come back on,
you can drive normally.
If the warning continues, pull over, stop, and park your vehicle right
away.
If there’s still no sign of steam, you can idle the engine for two or three
minutes while you’re parked, to see if the warning stops. But then, if you
223

Downloaded from www.Manualslib.com manuals search engine If the coolant inside the coolant surge tank is boiling, don’t do anything
else until it cools down.
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The coolant level should be visible inside the surge tank. If it isn’t and the
“ENGINE COOLANT LOW” message appears on the Driver
Information Center, you may have a coolant leak somewhere in the
cooling system. Should a low coolant condition exist, an overheat
protection
“LIMP HOME” feature which alternates firing groups of four
cylinders for
a predetermined number of cycles to prevent engine
damage, enabling your vehicle to be driven to the nearest service center.

Downloaded from www.Manualslib.com manuals search engine I
Engine damage from running your engine without coolant isn’t
covered
by your warranty.
If there seems to be no leak, check to see if the electric engine fans are
running.
If the engine is overheating, both fans should be running. If they
aren’t, your vehicle needs service.
How to Add Coolant to the Coolant Surge Tank
If you haven’t found a problem yet, but the coolant level isn’t visible
inside the surge tank add a
50/50 mixture of clean water (preferably
distilled) and a proper antifreeze at the coolant surge tank, but be sure
the cooling system, including the coolant surge tank pressure cap, is cool
before you do it.
(See “Engine Coolant” in the Index for more
information about the proper coolant mix.)
If it isn’t, you may have a leak in the radiator fiose, heater hoses, radiator, -
water pump or somewhere else in the cooling system. -
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Downloaded from www.Manualslib.com manuals search engine ENGINE 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.
The proper coolant for your Cadillac will:
Give freezing protection down to -34OF (-37 C).
0 Give boiling protection up to 262OF (128OC).
0 Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights work as they should.
What to Use
Use a mixture of one-half clean water (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. Use GM
Engine Coolant Supplement (sealer) with any complete coolant change.
If you use this mixture, you don’t need to add anything else.
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Downloaded from www.Manualslib.com manuals search engine If you use an improper coolant mix, your engine could overheat
and be badly damaged. The repair cost wouldn’t be covered by
your warranty.
Too much water in the mix can freeze and crack
the engine, radiator, heater core and other parts.
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Adding Coolant
Your cooling system when hot is under a lot of pressure. If the “ENGINE
COOLANT LOW” message should appear on the Driver Information
Center, you will need to
add coolant.
If the “ENGINE COOLANT LOW” message does not appear, the
coolant is
at the proper fill level.
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Downloaded from www.Manualslib.com manuals search engine SURGE TANK PRESSURE CAP
1 NOTICE:
Your surge tank 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. Be sure the arrows on the cap \
line up with the overflow tube on the radiator filler neck.
i
When you replace your surge tank pressure cap, an AC@ 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 preset temperature.
When you replace your thermostat, an
AC@ thermostat is recommended.
POWER STEERING FLUID
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AtNight ....................................... 188
Defensive ...................................... 173
Hill and Mountain ............................... 196
In Cities ........................................ 192
On Snow Or Ice ................................. 199
In The Rain ..................................... 190
In Winter ....................................... 198
On A Long Trip ................................. 194
On The Freeway ................................. 193
On Curves ...................................... 182
Through Deep Standing Water ...................... 87
Winter ......................................... 198
Drunken Driving ................................... 174
E
Economy. Fuel ..................................... 246
Electric Outside Mirror Control ...................... 123
Electrical Equipment. Adding .................... 224. 310
Electronic Climate Control .......................... 154
Electronic Level Control ............................ 152
Electronic Solar Sensor ............................. 159
Emergencies. Braking In ............................ 182
Emergencies. Steering In ............................ 183
Emergency Starting. Discharged Battery ............... 213
EmergencyTowing ................................. 219
Engine
Block Heater .................................... 86
Change Oil Indicator ............................. 151
Coolant ........................................ 265
Coolant Heater ................................... 86
Coolant Temperature Warning Lights ............... 136
Exhaust ......................................... 99
Oil ............................................ 253
Oil Additives .................................... 259
Oil Light ....................................... 138
Oil. When To Change ............................ 259
Overheating .................................... 222
Speed Limiter ................................... 139
Vehicle Speed Limiter (270 hp) .................... 139
Warning Light About Need For Service ............. 133
Ethanol In Gasoline ................................ 244
Exhaust. Caution .................................... 99
Exhaust. Dangerous Gas In ........................... 99
Expectant Mothers. Use Of Safety Belts By .............. 39
Explanation of Maint . Service ............. See Maint . Book
Express Down Window (Driver’s Side) ................. 101
.

Downloaded from www.Manualslib.com manuals search engine Mist. Driving In .................................... 190
Mobile Telephone. Adding A ......................... 310
Mountain Driving .................................. 196
MTBE In Gasoline ................................. 245
Mud. If You’re Stuck In ............................. 241
N
“N” (Neutral) Gear Position .......................... 90
Night. Driving At ................................... 188
Nightvision ....................................... 189
Notices About Damage ................................ 2
Net. Convenience ................................... 77
New Vehicle “Break-In” .............................. 83
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Occupant Restraint .................................. 11
Octane Required For Your Car ....................... 244
Odometer And Speedometer ......................... 131
Odometer. Trip .................................... 132
Off (Ignition Key Position) ............................ 84
Off Road Recovery ................................. 184
Oil. Engine ........................................ 253
Oil. When To Change Your Engine .................... 259
Oil Life Indicator ................................... 151
Oil Quality ........................................ 256
Oil Thickness (Viscosity) ............................ 257
Operating Record ....................... See Maint . Book
Operation in Foreign Countries ....................... 246
Outside Air ....................................... 153
Outside Mirrors ................................ 121. 123
Overdrive. Automatic ................................ 90
Overheated Engine. Warning Light For ................ 136
Owner Checks & Services ................. See Maint . Book
Odometer
......................................... 133
P
“P” (Park)
Position .................................. 88
Paint Spotting. Chemical ............................ 306
Park Position ....................................... 88
Park. Shifting Into ................................... 94
Park. Shifting Out Of ................................ 97
ParkingBrake ...................................... 92
ParkingonHills .................................... 208
Parking OvebThings That Burn ........................ 98
PASS Key I1 (Personalized Automotive Security Sys) .... 82
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