engine overheat BUICK REGAL 1999 Owner's Manual

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6-26
A 50/50 mixture of clean, drinkable water and
DEX
-COOL
coolant will:

Give freezing protection down to
-34F (-37C).

Give boiling protection up to 265F (129C).

Protect against rust and corrosion.

Help keep the proper engine temperature.

Let the warning lights and gages work as
they should.
NOTICE:
When adding coolant, it is important that you use
only DEX
-COOL (silicate-free) coolant.
If coolant other than DEX-COOL is added to the
system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the use
of coolant other than DEX
-COOL is not
covered by your new vehicle warranty.
What to Use
Use a mixture of one-half clean, drinkable water and
one
-half DEX-COOL coolant which won't damage
aluminum parts. If you use this coolant mixture, you
don't need to add anything else.
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 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 wouldn't
get the overheat warning. Your engine could
catch fire and you or others could be burned. Use
a 50/50 mixture of clean, drinkable water and
DEX
-COOL coolant.
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6-27
NOTICE:
If you use an improper coolant mixture, your
engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
warranty. Too much water in the mixture can
freeze and crack the engine, radiator, heater core
and other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
NOTICE:
If you use the proper coolant, you don't have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.
Checking Coolant
The vehicle must be on a
level surface. When your
engine is cold, the coolant
level should be at the
COLD mark or a little
higher. When your engine is
warm, the level should be
up to the HOT mark or a
little higher.
If this LOW COOLANT
light comes on and stays on,
it means you're low on
engine coolant.
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6-28
Adding Coolant
If you need more coolant, add the proper DEX
-COOL

coolant mixture at the coolant recovery tank, but be
careful not to spill it.
If the coolant recovery tank is completely empty, add
coolant to the radiator. (See ªEngine Overheatingº in
the Index.)
CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot 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.
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. Don't spill coolant on a hot engine.
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9-4
Driver
Information Center 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Position 1-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selectable Shifting 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving
City 4
-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defensive 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drunken 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freeway 4-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In a Blizzard 4-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
In the Rain 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Night 4-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Curves 4-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Grades While Towing a Trailer 4-38 . . . . . . . . . . . . . . .
On Hill and Mountain Roads 4-25 . . . . . . . . . . . . . . . . . . . .
On Snow or Ice 4-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Through Deep Standing Water 4-21 . . . . . . . . . . . . . . . . . . .
Wet Roads 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter 4-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drunken Driving 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual Automatic ComforTemp Climate Control 3-4 . . . . . . . . .
Dual ComforTemp Climate Control 3-2 . . . . . . . . . . . . . . . . . .
Electrical Equipment, Adding 2-20, 2-54, 3-22, 6-65 . . . . .
Electrical System 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview Mirror 2-48 . . . . . . . . . .
Engine 6-10, 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 6-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Heater 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coolant Level Check 7
-15 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Temperature Gage 2-66 . . . . . . . . . . . . . . . . . . . . .
Coolant Temperature Light 2-65 . . . . . . . . . . . . . . . . . . . . .
Exhaust 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification 6-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level Check 7-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overheating 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running While Parked 2-33 . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 6-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your V6 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Air Cleaner/Filter 6-18 . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additives 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking 6-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitor 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supercharger 6-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Used 6-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Kind to Use 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Change 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethanol 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust, Engine 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Lamps 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabric Cleaning 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Engine Air Cleaner/ 6-18 . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Engine Oil 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Passenger Compartment Air 6-19 . . . . . . . . . . . . . . . . .
Finish Care 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish Damage 6-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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9-8
Overheating Engine 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-15 . . . . . . . . . . . . . . . . . . . . . . .
Owner Publications, Ordering 8-10, 8-11 . . . . . . . . . . . . . . . .
Paint Spotting, Chemical 6-62 . . . . . . . . . . . . . . . . . . . . . . . .
Park
Automatic Transaxle 2
-23 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Into 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Out of 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking
At Night 2
-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake 2-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Mechanism Check 7-18 . . . . . . . . . . . . . . . . . . . . . . .
Lots 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Things That Burn 2-32 . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Compartment Air Filter 6-19 . . . . . . . . . . . . . . . . . .
Passing 4-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PASS-Key
II 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Shift Light 2-26, 2-73 . . . . . . . . . . . . . . . . . . . . .
Performance Shifting 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perimeter Lighting 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-19 . . . . . . . . . . . . . . . . . .
Power
Auxiliary Connection 2
-54 . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Locks 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option Fuses 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside Mirrors 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained Accessory 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat (Six-Way) 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering 4
-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Fluid 6-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pregnancy, Use of Safety Belts 1-19 . . . . . . . . . . . . . . . . . . . .
Problems on the Road 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Publications, Service and Owner 8-10, 8-11 . . . . . . . . . . . . . .
Publications, Service and Owner, Ordering in Canada 8-10 . .
Radiator, Adding Coolant 5-16 . . . . . . . . . . . . . . . . . . . . . . .
Radiator Pressure Cap 6-25 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio Reception 3-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radios 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rain, Driving In 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rainy Weather Tips 4-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading Lamps, Rearview Mirror 2-47 . . . . . . . . . . . . . . . . . .
Rear
Door Child Security Locks 2
-6 . . . . . . . . . . . . . . . . . . . . . .
Outside Seat Position 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Comfort Guides 1-30 . . . . . . . . . . . . . . . . . . . . .
Seat Passengers 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Window Defogger 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Seat Pass-Through Trunk 2-51 . . . . . . . . . . . . . . . . . . . .
Rear Seat Pass-Through Trunk Cushion Cupholders 2-51 . . .
Rearview Mirror 2-47, 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night 2-48 . . . . . . . . . . . . . . . . . . . . . .
Reading Lamps 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reclining Front Seatbacks 1-4 . . . . . . . . . . . . . . . . . . . . . . . . .
Recovery Tank, Coolant 5-13 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recreational Vehicle Towing 4-30 . . . . . . . . . . . . . . . . . . . . . .
Refrigerants, Air Conditioning 6-71 . . . . . . . . . . . . . . . . . . . .
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