1993 CADILLAC ELDORADO service

Downloaded from www.Manualslib.com manuals search engine NOTICE:
Engine damage fro running: your
covered hv vow 1 rrant
wine withc bolant isn’t
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 Recovery Tank
If you haven’t found a problem yet, but the coolant level isn’t at or above
“FULL COLD,” add a 50/50 mixture of clean water (preferably distilled)
and
a proper antifreeze at the coolant recovery tank. (See “Engine
Coolant’’
in the Index for more information about the proper coolant
mix.)
,/!1 CAUTIO
Adding only plain water ur coomg syscem can De
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
fir6
and you or others could be burned. Use a 50/50 mix of ( m
water I d a Droner antifreeze
I
I
NOTICE:
1
In cold weather, water can L Jeze and crack the engine, radiato,,
heater core and other parts. Use the recommended coolant.
234

Downloaded from www.Manualslib.com manuals search engine 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 at or above
“FULL
COLD,” add a 50/50 mixture of clean water (preferably distilled)
and a proper antifreeze at the coolant recovery tank. (See “Engine
Coolant” in the Index for more information about the proper coolant
mix.)
I
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
or others could be burned. Use a 50/50 mix of clean
water -nd
a proper antifreeze.
242

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A 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.
Should a low coolant condition
exist, an overheat protection “Limp
Home” feature of the
4.6L Northstar allows alternate 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.
I
A CAUTION
Steam and scalding liquids from a hot cooling system can blow
out and burn you badly. They are under pressure, and
if you
turn the coolant surge tank pressure cap
-- even a little -- they
can come out at high speed. Never turn the cap when the cooling
system, including the coolant surge tank pressure
cap, is hot.
Wait
for the cooling system and coolant surge tank pressure cap
to
cool if you ever have to turn the pre;.=we cap.
243

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SERVICE AND APPEARANCE CARE
Here you will find information about the care of your Cadillac. This
section begins
with service and fuel information, and then it shows how to
check important fluid and lubricant levels. There is also technical
information about your vehicle, and a section devoted to its appearance
care.
SERWCE
Your Cadillac dealer knows your vehicle best and wants you to be happy
with it.
Wc hopc you’ll go to your dealer for all your service needs. You’ll
get genuine GM parts and GM-trained and supported service people.
We hope you’ll want to keep your GM vehicle all GM. Genuine GM parts
have one
of these marks:
Doing Your Own Service Work
If you want to do some of your own service work, you’ll want to get the
proper Cadillac Service Manual. It tells you much more about
how to
service your Cadillac than this manual can.
To order the proper service
manual, see “Service Publications’’ 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.
258

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P
A CAUTION
You can be iqjnred if you try to do service work on a vehicle
without knowing enough about it.
Be sure you have sdlicient knowledge, experience, and the
proper replacement parts and tools before you attempt any
vehicle maintenance task,
@ Be sure to use the proper nuts, bolts and other fasteners.
“k@sh” and ccmetricm fasteners can be easily eonffrsed. If
you use the mng fasteners, parts can later break or fall off.
You could be hurt.
1_ FUEL
!-
Use premium unleaded gasoline rated at 91 octane or higher. It should
meet specifications
ASTM D4814 in the US. 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 U.S. and Canada, it’s easy to be sure you get the right kind of
only unleaded nozzles will fit into your vehicle’s filler neck.
T- gasoline (unleaded). You’ll see “UNLEADED” right on the pump. And
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.
I
259

Downloaded from www.Manualslib.com manuals search engine What about gasoline with blending materials that contain oxygen, such as
MTBE or alcohol?
MTBE is “methyl tertiary-butyl ether.” Fuel that is no more than
15%
MTBE is fine for your car.
Ethanol is ethyl or grain alcohol. Properly-blended fuel that is no more
than
10% ethanol is fine for your car.
Methanol
is methyl or wood alcohol.
r 1
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 6Ccosolvents” and corrosion preventers in this fuel to help
avoid these Droblems.
Gasolines for Cleaner Air
Your use
of gasoline with detergent 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 materials called 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 gasolines contain
detergents and oxygenates, and
if they have been reformulated to reduce
vehicle emissions.
260

Downloaded from www.Manualslib.com manuals search engine How To Reset the Oil Life Indicator: After the oil has been changed,
display the
‘OIL LIFE INDEX’ message by pressing the
‘INFORMATION’ button. Then press and hold
the ‘STORE/RECALL:
button until the display shows
‘100’. This will reset the oil life index. The
message will remain OFF until the next oil change is needed. The
percentage
of oil life remaining may be check at any item by pressing the
INFORMATION button several times until the
‘OIL LIFE INDEX’
message appears.
Engine Block Heater: An engine block heater can be
a big help if you
have to park outside in very cold weather, 0 F (-18 C) or colder. If your
vehicle has this option, see “Engine Block Heater”
in the Index.
What
to Do with Used Oil:
1 A CAUTION:
Used engine oil contains things that have caused skin cancer in
laboratory animals. Don’t let used
oil stay on your skin for very - ‘J;
long. Clean your skin and nails with soap and water, or a good -
hand cleaner. Wash or properly throw away clothing or rags
$1
containing used engine oil. I. , e.- - .: - e 4
Used oil can be a real threat to the environment. If you change your own
oil, be sure to drain all free-flowing
oil from the filter before disposal.
Don’t ever dispose
of oil by pouring it on the ground, into sewers, or into
streams or bodies of water. Instead, recycle
it by taking it to a place that
collects used
oil. If you have a problem properly disposing of your used
oil,
ask your dealer, a service station or a local recycling center for help.
274

Downloaded from www.Manualslib.com manuals search engine AIR CLEANER
I
....
tT 4.6 Liter (Northstar)
To gain access to the air cleaner element, loosen the four screws and lift
the top half of the air cleaner assembly.
Refer
to the Maintenance Schedule to determine when to replace the air
filter.
See "Scheduled Maintenance Services"
in the Index.
275