1995 OLDSMOBILE AURORA 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. See “Overheated
Engine Protection Operating Mode” in the Index.
If 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 window as necessary.
3. If you‘re in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while driving --
AUTOMATIC OVERDRIVE (@) or THIRD (3).
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about
10 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 still have the
warning,
turf? ofthe engine and get everyone out qf the
vehicle until it cools down. Also, see “Overheated
Engine Protection Operating Mode” listed previously
in
this section.
You may decide not to lift the hood but to get service
help right away.
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Cooling System
If the coolant inside the coolant surge tank is boiling.
don’t do anything else
until it cools down.
When
you decide it’s safe to lift the hood, here’s what
you’ll see:
A. Coolant surge tank with pressure cap
B. Two electric engine fans
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The coolant level
should be at or above
FULL COLD. If it
isn’t and the LOW
ENGINE COOLANT
message appears on
the Driver Inforn~ation
Center, you may have
a leak
in the radiator
hoses, heater hoses,
radiator, water
pump
or somewhere else in
the cooling system.
I NOTICE:
Engine damage if you keep running your engine
without coolant isn’t covered by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index.
I
If there seems to be no leak, with the engine on, check to
see if the electric engine fan(sj are running. If the engine
is overheating, both fan(sj should be running. If they
aren’t, your vehicle needs service.
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How to Add Coolant to the Coolant Surge
Tank
If you haven't found a problem yet. but the coolant level
isn't at FULL COLD. add a SO/SO mixture of clecrn
c1*trreI- (preferably distilled) and a proper antifreeze at the
coolant surge tank, but be
SLIE 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.)
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I NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core
and other parts. So
use the recommended coolant.
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4. With the coolant surge tank pressure cap off', start the
engine and
let it run until YOLI can feel the upper r it d' lator
hose getting hot. Watch
out for the engine fans.
By this time, the coolant level inside the coolant surge
tank
may be lower. If the level is lower, add more of'the
proper mix
to the coolant surge tank until the level
reaches
FULL COLD.
5. Then replace the
pressure cap.
Be
sure the pressure
cap
is tight.
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Your vehicle has an air bag system. Before attempting to
do your own service work, see “Servicing Your Air
Bag-Equipped Aurora” in the Index.
You should keep a record with all parts receipts and list
the mileage and the date of any service work you
perform. See “Maintenance Record” in the Index.
I NOTICE: 1
If you try to do your own service work without
knowing enough about it, your vehicle could be
damaged.
Fuel
Use premium unleaded gasoline rated at 91 octane or
higher. It should meet specifications ASTM D48 14 in
the United States and CGSB 3.5-92 in Canada. These
fuels should have the proper additives,
so you should not
have to add anything to the fuel.
In the United States and Canada, it’s easy
to be sure you
get the right kind of gasoline (unleaded). You’ll see
UNLEADED right on the pump. And only unleaded
nozzles will fit into your vehicle’s filler neck.
Be sure the posted octane is at least 91. If the octane is
less than
91, you may get a heavy knocking noise when
you drive. (In an emergency, you may be able to use
lower octane
-- as low as 87 -- if heavy knocking does
not occur.) If you’re using 91 or higher octane unleaded
gas and
you still get heavy knocking, your engine needs
service.
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What about gasoline with blending materials that
contain oxygen (oxygenates), such
as MTBE or alcohol‘?
MTRE is “methyl tertiary-butyl ether.” Fuel that is no
more than
15% MTBE is fine for your vehicle.
Ethcrnol is ethyl or grain alcohol. Properly-blended fuel
that
is no more than 10% erhd is fine for your
vehicle.
Metlmzol is methyl or wood alcohol.
NOTICE:
Fuel that is more than 5% methanol is bad for
your vehicle. Don’t use it. It can corrode metal
parts in your fuel system and also damage plastic
and rubber parts. That damage wouldn’t be
covered under your warranty. And even at
5% or
less, there must be “cosolvents” and corrosion
preventers in this fuel to help avoid these
problems.
Gasolines for Cleaner Air
Your use of gasoline with deposit control additives will
help prevent deposits from forming in your engine and
fuel system. That helps keep your engine
in tune and
your emission control system working properly. It’s
good for your vehicle, and you’ll be doing your part for
cleaner air.
Many gasolines are now blended
with oxygenates.
General Motors recommends that you use gasolines with
these blending materials, such as MTBE and ethanol. By
doing
so, you can help clean the air, especially in those
parts of the country that have high carbon monoxide
levels.
In addition, some gasoline suppliers are now producing
reformulated gasolines. These gasolines are specially
designed to reduce vehicle emissions. General Motors
recommends that you use reformulated gasoline.
By
doing so, you can help clean the air, especially in those
parts
of the country that have high ozone levels.
You should ask your service station operators
if their
L. zasolines contain deposit control additives and
oxygenates, and
if they have been reformulated to
reduce vehicle emissions.
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