check engine CADILLAC SEVILLE 1993 4.G Service Manual

Downloaded from www.Manualslib.com manuals search engine ENGINE OIL
It’s a good idea to check your engine oil every time you get fuel. In order
to get an accurate reading,
the oil must be warm and the vehicle must be
on level ground.
..
4.9 Liter
4.6 Liter (Northstar)
Turn
off the engine and give the oil a few minutes to drain back into the
oil pan. If
you don’t, the oil dipstick might not show the actual level.
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To Check Engine Oil: Pull out the dipstick and clean it with a paper towel
or cloth, then push it back in all the way. Remove it again, keeping the tip
lower.
270

Downloaded from www.Manualslib.com manuals search engine This doughnut-shaped logo (symbol) is used on most oil containers to
help you select the correct oil.
You should look for this on the oil container, and use
only those oils that
display the logo.
GM Goodwrench@ oil
(in Canada, GM Engine Oil) meets all the
requirements for your vehicle.
Engine Oil Additives: Don’t add anything to your oil. Your Cadillac
dealer
is ready to advise if you think something should be added.
When to Change Engine Oil: Your vehicle is equipped with an engine oil
life index (EOLI) feature as part of the Driver Information Center
display (DIC). Oil change intervals are determined
by the EOLI and will
usually fall at, or between, the two recommended alternative intervals of
3,000 miles (5,000 kilometers) and 7,500 miles (12,500 kilometers), but
could
be shorter than 3,000 miles (5,000 kilometers) under some very
severe driving conditions shown in Schedule I. The system will also
indicate the need for an
oil change if 7,500 miles (12,500 kilometers) or
one year has passed.
Engine oil life remaining
is displayed through engine data as the ‘OIL
LIFE INDEX’ and as a
‘CHANGE ENGINE OIL message. The ‘OIL
LIFE INDEX’ display includes a number between
0 and 100. This is the
percentage
of oil life REMAINING based on driving conditions and
mileage driven since the last time
of the oil life indicator was reset. When
the remaining oil life is less than
lo%, a ‘CHANGE OIL SOON’ message
will appear. This is a reminder to schedule an engine oil change. When
the oil life index reaches
0, the ‘CHANGE ENGINE OIL: message will
appear. This indicates that no oil life remains and the oil should be
changed as soon as possible, but certainly within the next 200 miles (320
km).
The EOLI will not detect excessively dusty conditions or engine
malfunctions which may effect the oil.
If you drive in dusty areas, change
the engine
oil after every 3,000 miles (5,000 kilometers) or 3 months
(whichever comes first), unless instructed
to do so sooner by the DIC.
On Northstar 4.6 Liter engine equipped vehicles a ‘CHECK OIL LEVEE
message will appear whenever the oil level’s approximately one quart low.
275

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, -20” F (-29 “C) or colder. If
your vehicle
has this option, see “Engine Block Heater” in the Index.
What to Do with Used Oil:
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
long. Clean your skin and nails with soap and water, or a good
hand cleaner. Wash or properlv throw away clothing or rags
containing used engine
oil.
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.
3
I
276

Downloaded from www.Manualslib.com manuals search engine A CAUTION
Operating the engine with the air cleaner off can cause you or
others
to be burned. The air cleaner not only cleans the air, it
stops flame if the engine backfires.
If it isn’t there, and the
engine backfires, you could be burned. Don’t drive
with it off,
and be careful working on the engine with the air cleaner off.
J
NOTICE:
If the air cleaner is off, a backflre can cause a damaging tngine
fire, And, dirt can easily get into your engine, which will drmagc
it, Always have the air cleaner io place when you’rt ddvlng.
AUTOMTIC TRANSAXLE FLUID
When to Check and Change:
A good time to check your automatic transaxle fluid level is when the
engine oil is changed. Refer to the Maintenance Schedule to determine
when to change your
fluid. See “Scheduled Maintenance Services” in the
Index.
How to Check
Because this operation can
be a little difficult, you may choose to have
this done at a Cadillac dealership Service
Department.
If you do it yourself, be sure to follow all the instructions here, or you
could get a false reading on the dipstick.
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P
Wait at least 30 minutes &ore checking the transaxle fluid level if you
have been driving:
When outside temperatures are above 90’F (32’ C).
At high speed for quite a while.
In heavy traffic -- especially in hot weather.
While pulling a trailer.
To get the right reading, the fluid should be at normal operating
temperature, which is
180°F to 200°F (82OC to 93’C).
Get the vehicle warmed up
by driving about 15 miles (24 km) when
outside temperatures are above
5O0F (loo C). If it’s colder than 5OoF
(lO°C), you
may have to drive longer.
To check the fluid level:
0
0
0
0
Park your vehicle on a level place.
Place the shift lever in
“PYy (Park) with the parking brake applied.
With your foot
on the brake pedal, move the shift lever through each
gear range, pausing
for about three. seconds in each range, Then,
position
the shift lever in “P” (Park).
L-ct Ihc cngirlr ruI1 ;II idlc for thrw to five minutes.
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279

Downloaded from www.Manualslib.com manuals search engine . ..
4.9 Liter
4.6 Liter (Northstar)
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3. Check both sides of the dipstick, and read the lower level. The fluid
level must be in the cross-hatched area.
4. If the fluid level is where it should be, push the dipstick back in all the
How to Add Fluid:
way.
Refer to the Maintenance Schedule to determine what kind
of transaxle
fluid to
use. See “Recommended Fluids and Lubricants” in the Index.
If the fluid level is low, add only enough of the proper fluid to bring the
level into the cross-hatched area
on the dipstick. It doesn’t take much
fluid, generally
less than a pint. Don’t overfill. We recommend you use
only fluid labeled DEXRON@-IIE, because fluids with that label
are
made especially for your automatic transaxle. Damage caused by fluid
other than DEXRON@-IIE is not covered
by your new vehicle warranty.
After adding fluid, recheck the fluid level as described under “How to
Check.”
281

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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 and a proper antifreeze.
Adding Coolant
I 4.6 Liter (Northstar)
TO Check Coolant
When.
your engine is
cold, the coolant level
should be at “FULL
COLD”, or a little
higher.
283
P

Downloaded from www.Manualslib.com manuals search engine When your engine is warm and the “ENGINE COOLANT LOW”
message does not appear on the Driver Information Center, coolant
is at
the proper fill level.
4.9 Liter
To Check Coolant:
When your engine is
cold, the coolant level
should be at
“FULL
COLD,” or a little
higher. When your
engine is warm,
the
level should be up to
“FULL
HOT,” or a
little higher.
To Add Coolant 4.9L If you need more coolant, add the proper mix at
the coolant recoverv tank.
A CAUTION
flrrning the radiator pressure cap when the engine and radiator
are hot can allow steam and scalding liquids to blow
out and
bum 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.
284

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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.
To Add Coolant 4.6L (Northstar): If you need more coolant, add the
proper
mix at the coolant surPe tank.
A CAUTION:
lbrning the surge tank pressure cap when the engine and
radiator are hot
can allow steam and scalding liquids to blow
out and burn you badly. Never turn the surge tank pressure cap
-- even a little -- when the engine and radiator are hot.
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.
To Check or Add Coolant: When the engine is cold, the coolant level
should be at
“FULL COLD,” or a little higher. Remove the pressure cap
from the surge tank;
use a flashlight as necessary to see into the tank. The
coolant Ievel should be at or above the seam inside the tank.
If you need more coolant, add the proper mix.