engine overheat CADILLAC DEVILLE 1994 7.G User Guide

Downloaded from www.Manualslib.com manuals search engine 3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
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 (32’Celsius) with a loaded vehicle and trailer.
Stopping after high-speed driving.
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” 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 transmission
selector to
P (Park) and allow the engine to idle. Do not turn off 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 to
resume. At that
time resume driving at a reduced speed. Return to
normal driving after
10 minutes if the “ENGINE COOLANT HOT”
message
is not displayed.
Maintenance when Trailer Towing
Your vehicle will need service more often when you’re pulling a trailer.
See
the Maintenance Schedule for more on this. Things that are
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.
Check periodically
to see that all hitch nuts and bolts are tight.
213

Downloaded from www.Manualslib.com manuals search engine Don't have your vehicle towed on the front wheels, unless you must. If
the vehicle must be towed on the front wheels, don't go more than 55
mph (88 km/h) or farther than 500 miles (804 km) or your transaxle will
be damaged. If these limits must be exceeded, then the front wheels have
to be supported on a dolly.
NOTICE:
Do not attach winch cables or "J" hooks to suspension
components when using car carrier equipment. Always use
T-hooks inserted in the T-hook slots.
ENGINE OKE..EATING
The Driver Information Center will display either" ENGINE COOLANT
HOT IDLE ENGINE' or
"STOP ENGINE ENGINE
OVERHEATING". If
you have a Canadian or Export vehicle you will
also find a warning light about a hot engine on the instrument cluster.
225

Downloaded from www.Manualslib.com manuals search engine #‘No 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
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.
runs
slower).
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
still have the warning, TURN OFF THE ENGINE AND GET
EVERYONE OUT OF THE VEHICLE until it cools down.
You may decide not to lift the hood, but get service help right away.
227

Downloaded from www.Manualslib.com manuals search engine The coolant level should be at or above the FULL COLD marking on the
coolant recovery tank.
If it isn’t, you may have a coolant leak somewhere
in the cooling system.
NOTICE:
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.
229

Downloaded from www.Manualslib.com manuals search engine When the correct fluid level is obtained, push the dipstick back in all -
the way.
ENGINE COOLANT 7
The following explains your cooling system and how to add coolant when (. I
it is low. If you have a problem with engine overheating, see “Engine
Overheating” in the Index.
The proper coolant for your Cadillac will:
0 Give freezing protection down to -34°F (-37OC) .
0 Give boiling protection up to 262 F (128 C) .
0 Prote-ct against rust and corrosion.
Help keep the proper engine temperature.
Let the warning-lights work as they shoula.
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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c
270

Downloaded from www.Manualslib.com manuals search engine .A CAUTION:
. Adding only plain water to your cooling system can be
’ . dangerous. Plain water, or some-other liquid like alcohol, can
boil before the proper coolant .mix ,will. Your vehicle’s coolant
warning
system is set-for the proper coolant mix. With plain
water or the
wrong mix, your engine could get too hot but you
.wouldn’t get the overheat warning. Your engine could catch fire
and you
OF others could be burned. Use a 50/50 mix of clean
water and
a proper antifreeze.
NOTICE:
If you use an improper coolant mix, your engine could overheat
and be badly damaged. Therepair cost wouldn’t be covered
by
your warranty. Too much water in the mix can freeze and crack
the engine, radiator, heater .coreand other parts.
Adding Coolant
The Coolant Recovery Tank is located on the right side of your vehicle.
To Check Coolant
When your -engine is cold, the coolant level should be at the FULL
COLD mark or a little higher. When your engine is warm, the level
should be up to
FULL HOT mark or a little higher.
To Add Coolant
If you need more coolant, add the proper mix at the coolant recoverv
tank.
271

Downloaded from www.Manualslib.com manuals search engine 4 .. .. .
A CAUTION:
brning the radiator pressure cap when the engine and radiator
are
hut can allow steam and scalding liquids to blow out and
burn you badly. With the coolant recovery tank, you will almost
never have to add coolant
at the radiator. Never turn the
radiator
pressure cap -- even a little -- when the engine and
radiator are
hot.
Add coolant mix at the recovery tank, but be careful not to spill it.
A CAUTION:
You can be burned if you spil1 coolant on hot engine parts.
Coolant contains ethylene glycol, and it will burn if the engine
parts are hot
enough. Don’t spill coolant on a hot engine.
I
NOTICE:
Your radiator pressure cap is a 15 psi (105 ma) 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 filier
neck.
When you replace your radiator pressure cap, a GM cap is
recommended.
272

Downloaded from www.Manualslib.com manuals search engine - Headlights
The headlight wiring is protected by a circuit breaker in the light switch.
An electrical overload will cause the lights to go on and off, or in some
cases to remain off.
If this happens, have your headlight wiring checked
right away.
Windshield Wipers
The windshield wiper motor is protected by a circuit breaker and a fuse.
If the motor overheats due to heavy snow, etc., the wiper will stop until
the motor cools. If the overload is caused by some electrical problem and
not snow, etc., be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers in the fuse panel protect the power windows and other
opens and closes, protecting the circuit until the problem is fixed or goes
away.
__ power accessories. When the current load is too heavy, the circuit breaker
--
BULB CH4RT
DESCRIPTION BULB NO.
Backup Lights ......................................... 2057
Cornering Light ..................................... 3156 52
Ash Tray Illumination .................................. 1445
Courtesy Reading Light
................................. 168
Glove Compartment Light
............................... 194
-Inner High Beam
................................. 9005 HB3
Headlights Composite
-Outer Low Beam
................................. 9006 HB4
License Plate Light
..................................... 194
Park and Turn Signal
................................ 3157 K2
Side Marker Lights ..................................... 194
Stop/Tail/Turn Signal
................................ 2057 NA
Trunk Light
........................................... 1003
Vanity Mirror Illumination
............................... 124
319

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Driver Information Center Messages .................. 142
Driver’s Side S.I.R. (“Air Bag”)
........................ 30
Driving
AndtheRoad. Your
.............................. 176
AtNight
....................................... 191
Defensive
...................................... 176
Hill and Mountain
............................... 200
InCities
........................................ 196
On
Snow Or Ice ................................. 203
In The Rain
..................................... 193
In Winter
....................................... 202
On A Long Trip ................................. 198
On The Freeway ................................. 197
OnCurves
...................................... 185
Through Deep Standing Water
...................... 88
Winter
......................................... 202
Drunken Driving
................................... 177
E
Economy. Fuel ..................................... 251
Electric Outside Mirror Control ...................... 125
Electrical Equipment. Adding
.................... 158. 313
Electronic Climate Control .......................... ’ 151
Electronic Level Control .....
Electronic Solar Sensor ......
Emergencies. Braking In .....
Emergencies. Steering In .....
Emergency Starting. Discharged
Emergency Towing
..........
Engine
...................... 149
...................... 155
...................... 185
...................... 186
Battery
............... 217
...................... 222
- Block Heater ..................................... 89
Change Oil Indicator
............................. 148
Coolant
........................................ 270
Coolant Heater
................................... 89
Coolant Temperature Warning Light
................ 135
Exhaust ........................................ 100
Oil ............................................ 259
Oil Additives .................................... 264
OilLight
....................................... 135
Oil, When To Change ............................ 264
Overheating
.................................... 226
Ethanol In Gasoline
................................ 250
Exhaust, Caution
................................... 100
Exhaust. Dangerous Gas In
.......................... 100
Expectant Mothers. Use Of Safety Belts By .............. 39
Explanation
of Maint . Service ............. See Maint.‘Book

Downloaded from www.Manualslib.com manuals search engine .
MTBE In Gasoline ................................. 250
Mud. If You’re Stuck
In ............................. 247
N
“N” (Neutral) Gear Position .......................... 92
Net. Convenience
................................... 78
Night. Driving At
................................... 191
Nightvision
....................................... 192
Notices About Damage
................................ 2
New Vehicle
“Break-In”
.............................. 85
0
Occupant Restraint .................................. 11
Octane Required For Your Car ....................... 249
Odometer
......................................... 132
Odometer And Speedometer ......................... 131
Odometer. Trip
.................................... 131
Off (Ignition Key Position) ............................ 86
Off Road Recovery ................................. 187
Oil. Engine
........................................ 259
Oil. When To Change Your Engine .................... 264
Oil Life Indicator
................................... 148
Oil Quality
........................................ 261
Oil Thickness (Viscosity)
............................ 262
Operating Record
....................... See Maint . Book
Operation in Foreign Countries
....................... 251
Outside Air
....................................... 153
Outside Mirrors
.................................... 125
Overdrive, Automatic
................................ 93
Overheated Engine, Warning Light For ................ 136
Override, Trunk Security
......................... ... 77
Owner Checks & Services ................. See Maint . Book
“P” (Park) Position
.................................. 91
Paint Spotting. Chemical
............................ 309
Park. Shifting Into
................................... 96
Park. Shifting Out
Of ................................ 98
Parking Brake
...................................... 95
Parking On Hills ................................... 213
Parking
Ozr Things That Burn ........................ 99
Passing Another Vehicle
............................. 188
Park Position
....................................... 91
PASS Key (Personalized Automotive Security Sys)
...... 84
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