1994 CADILLAC ELDORADO engine coolant

Downloaded from www.Manualslib.com manuals search engine p““
4. With the coolant
surge tank
pressure cap
off,
start the engine
and let it run until
you can feel the
upper radiator
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 about 2 1/2 inches (60 mm) below the base of the
filler neck.
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5. Then replace the
pressure cap. Be
sure the arrows
on
the pressure cap
line up like this. 7
Start the engine and allow it to warm up. If the “ENGINE COOLANT
LOW” message does not appear on the Driver Information Center,
coolant is at
the proper fill level. If an “ENGINE COOLANT LOW”
message does appear, repeat steps 1 to 3 or see your dealer.
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Downloaded from www.Manualslib.com manuals search engine Engine Oil Additives
k Don’t add anything to your oil. Your Cadillac dealer is ready to advise if
you think something should be added.
‘C When to Change Engine Oil
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Your Cadillac has an “Oil Life Indicator.” This feature will let you know
when to change your oil
-- usually between 3,000 miles (5 000 km) and
7,500 miles (12 500
km) since your last oil change. Under severe
conditions, the indicator may come on before
3,000 miles (5 000 km).
Never drive your vehicle more than 7,500 miles (12 500 km) or 12 months
without an oil change.
The system won’t detect dust in the oil.
So, if you drive in a dusty area, be
sure to change your oil every 3,000 miles (5 000 km) or sooner if the
“CHANGE ENGINE OK’ message is displayed. Remember to reset the
Oil Life Indicator when the oil has been changed. For more information,
see “Oil Life Indicator” in the Index.
How to Reset the Oil Life Indicator
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After the oil has been changed, display the “OIL LIFE LEFT” message
by pressing the INFORMATION button. Then press and hold the
RESET button until the display shows
“loo”.. This resets thle.,oil life index.
The message will remain
off until the next oil change is needed. The
percentage of oil life remaining may be checked at any time by pressing
the INFORMATION button several times until the
“OIL LE% LEFT”
message appears. For more information on the Oil Life Index feature, see
“Oil Life Index” in the Index.
Engine Coolant Heater (Engine Block Heater)
An engine coolant heater can be a big help if you have to park outside in
very cold weather, O°F (-18O C) or colder. If your vehicle has this option,
see “Engine Coolant Heater” in the Index.
257

Downloaded from www.Manualslib.com manuals search engine 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’% the Index.
r The proper coolant for your Cadillac will:
0 Give freezing protection down to -34°F (-37°C). - I .0 Give boiling protection up to 262°F (128O C).
0 Protect against rust and corrosion.
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Help keep the proper engine temperature.
0 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 coofant change.
If you use this mixture, you don? need to add anything else.
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Downloaded from www.Manualslib.com manuals search engine NOTICE:
If you use an improper coolant mix, your engine could overhea,t
and be badly damaged. The repair cost wouldn’t be covered b\
y
your warranty. Too much water in the mix can freeze and crack
the engine, radiator, heater core and other parts.
Adding Coolant
I
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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To Add Coolant
If you need more coolant, add the proper mix at the coolant surce tank.
.~ . .
To Check or Add Coolant
When the engine is cold, remove the pressure cap from the surge tank,
use a flashlight as necessary to see into the tank. The coolant level should
be visible inside the tank about
2 112 inches (60 mm) below the base of
the fill neck.
If you need more coolant, add the proper mix.
SURGE TANK PRESSURE CAP
NOTICE:
Your surge tank cap is a 15 psi (1.05 kPa) pressure-type cap ana
must be tightly installed to prevent coolant loss and possible
engine damage
&om overheating. Be sure the arrows on the cap
line up with the overflow tube
on the surge tank filler neck.
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When you replace your surge tank pressure cap, an GM@ cap is
recommended.
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265

Downloaded from www.Manualslib.com manuals search engine 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
How To Check Power Steering Fluid
Unscrew the cap and wipe the dipstick with a clean rag. Replace the cap
and completely tighten
it. Then remove the cap again and look at the
fluid level
on the dipstick.
266

Downloaded from www.Manualslib.com manuals search engine The Northstar engine is designed to require less maintenance than many
other DOHC
V-8 engines. Engine systems are designed to remind the
driver when service is required.
An oil life index indicator monitors
ongoing operating conditions and reminds the driver when an oil change
is needed.
A low coolant warning message keeps track.of the level of this
vital fluid. Direct acting hydraulic tappets provide maintenance free zero
lash operation
of the 32 valves from idle to the 6500 rpm redline. The
camshafts are driven by
a two stage roller chain assembly which is
designed
to provide quiet maintenance free Operation. Platinum tipped
,spark plugs increase the replacement interval
to 100,000 miles.
The four valve per cylinder design provides more efficient engine
breathing which results in higher power than comparable
two valve
engines. The central location
of each spark plug ensures a fast and
complete burning of the fuel/air mixture. The induction system uses
smooth thermoplastic tubes to channel air into the cylinders. The
smoothness
of the tubes is equivalent to the elaborate port polishing
methods used for race car engines. Careful design using the shape and
length
of the tubes boosts horsepower by using sonic pressure waves
created by the motion
of the inlet valves to increase the amount of air
entering ,each cylinder.
The Northstar engine is also designed
to be very durable. The aluminum
block has cast-in-place iron cylinder liners for greater wear resistance.
High strength connecting rods support the free floating piston pins in
bronze bushings for superior high speed performance. The fillets
of the
nodular iron crankshaft undergo
a high pressure compression rolling
operation to improve their resistance to fatigue.
Quiet operation is enhanced by the use of special materials and designs.
The front cover of the engine is stamped from laminated steel which
damps out noise. Special cam cover gasket seals isolate valve train
operation.The fuel injectors are placed inside the induction system
housing
to eliminate- the clicking noise which is common to other fuel
injected engines.
The Northstar engine is designed to provide years of efficient. reliable.
satisfying operation.
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ELDORADO INDEX
A
Acc (Ignition Key Position) ........................... 84
Accessory Power. Retained .......................... 311
Adding Brake Fluid
..................................... 272
Electrical Equipment ............................. 311
Engine Coolant ............................. 224. 262
Engine Oil ...................................... 253
Power Steering Fluid ............................. 267
Transaxle Fluid .................................. 262
Additives. Engine Oil ............................... 257
Adjustment. Brake ................................. 273
Adult Safety Belt Usage .............................. 20
Air Bag ............................................ 30
Air Cleaner ........................................ 258
Air Cleaner Replace ..................... See Maint . Book
Air Conditioner .................................... 151
Air Outlets ........................................ 150
Air System ........................................ 150
Alarm. How To Turn Off Theft ........................ 80
Alcohol. Driving Under The Influence Of .............. 171
Alcohol in Gasoline ................................. 243
Aluminum Wheels. Cleaning ......................... 305
AM Radio Reception ............................... 157
AM Stereo Radio Reception ......................... 158
Antenna. Cleaning Radio ............................ 168
Antifreeze ........................................ 263
Anti-Lock Brakes .................................. 177
Anti-Lock Brake System Warning Light ............ 133. 177
Anti-Lockout Feature ................................ 71
Anti-Theft Tips ..................................... 79
Appearance Care .................................... 298
Arm. Wearing A Safety Belt Under Your ................ 28
Ashtrays .......................................... 126
Astroroof ......................................... 124
Automatic Air Conditioning System ................... 151
Automatic Door Lock ................................ 70
Air Cleaner Filter Replacement ...................... 285
AMAX@ ........... .- .............................. 158
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