1993 CADILLAC SEVILLE Owners Manual

Downloaded from www.Manualslib.com manuals search engine -
8. Replace the
pressure cap. Be
sure the arrows on
the pressure cap
line up like this.
COOLING SYSTEM= 4.6 LITER
(NORTHSTAR)
i
When you decide it's safe to lift the hood, here's what you'll see:
Coolant surge tank with pressure cap
Electric engine fans
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Downloaded from www.Manualslib.com manuals search engine I A CAUTION
An electric fan under the hood can start up even when the
engine
is not running and can injure you. Keep hands, clothing
and tools
away from any underhood electric fan.
If the coolant inside the coolant surge tank is boiling, don’t do anything
else until it cools
down.
The coolant level
should be at or above
“FULL COLD.” If it
isn’t,
you may have a
leak in the radiator
hoses, heater hoses,
radiator, water pump
or somewhere else in
the cooling
system.
A CAUTION:
Heater and radiator hoses, and other engine parts, can be very
hot. Don’t touch them.
If you do, you can be burned.
Don’t
run the engine if there is a leak If you run the engine, it
could lose
all coolant. That could cause an engine fire, and you
could be burned. Get any leak fixed before you drive the vehicle.
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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.)
A CAUTION
Adding only plain water to your cooling system 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 fire
and you or others could be burned. Use a
50/50 mix of clean
water and
a proper antifreeze.
245

Downloaded from www.Manualslib.com manuals search engine 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 4.6 L 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.
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 pressure cap.
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P
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1. You can remove
the coolant surge
tank pressure cap
when
the cooling
system, including
the coolant surge
tank pressure cap
and upper radiator
hose, is no longer
hot. Turn the
pressure cap slowly
to the
left until it
first stops.
(Don’t press down while turning the pressure cap.)
If you hear a hiss, wait for that to stop. A hiss means there is still some
pressure left.
247
F

Downloaded from www.Manualslib.com manuals search engine 2. Then keep turning
the pressure cap,
but now push down
as you turn it. Remove the
pressure cap.
3. Fill the coolant
surge tank with the
proper
mix, up to
the base
of the
filler neck.
248

Downloaded from www.Manualslib.com manuals search engine . : 4. Put the cap back on
the coolant
surge
tank.
5. Start the engine and as the engine runs the coolant will circulate
through the cooling system. Any air that was introduced while adding
coolant
will purge itself and rise to the top of the surge tank. 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
through 4 or see your dealer.
IFA TIRE GOES FLAT
It’s unusual for a tire to “blow out” while you’re driving, especially if you
maintain your tires properly. If air goes out of a tire, it’s much more likely
to leak out slowly. But if you should ever have a “blowout,” here are a
few tips about what to expect and what
to do:
If a front tire fails, the flat tire will create a drag that pulls the vehicle
toward that side. Take your foot off the accelerator pedal and grip the
steering
wheel firmly. Steer to maintain lane position, then gently brake
to a stop
well out of the traffic lane.
A rear blowout, particularly on a curve, acts much like a skid and may
require the same correction you’d use in a skid. In any rear blowout,
remove your foot from the accelerator pedal. Get the
vehicle under
control by steering the way you want the vehicle to
go. It may be very
bumpy and noisy, but you can still steer. Gently brake to a stop,
well off
the road if possible.
3
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Downloaded from www.Manualslib.com manuals search engine If your tire goes flat, the next section shows how to use your jacking
equipment
to change a flat tire safely.
CHANGING A FLAT TIRE
If a tire goes flat, avoid further tire and wheel damage by driving slowly to
a level place. Turn on your hazard warning flashers.
A CAUTION:
Changing a tire can cause an injury. The vehicle can slip off the
jack and ro11 over you or other people. You and they could be
badly injured. Find a level place
to change your tire. To help
prevent the vehicle from moving:
1. Put the shift lever in “P” (Park).
2. Set the parking brake firmly.
3. lhrn off the engine.
To be even more certain the vehicle won’t move, you can put
chocks
at the front and rear of the tire farthest away from the
one being changed. That would be the tire
on the other side of
the vehicle, at the opposite end.
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