cooling CHEVROLET S10 1993 2.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
After Off-Road Driving
Remove any brush or debris that has collected on the underbodv\
. chassis, or
under the hood. These accumulations can be a fire hazard.
After operation in mud or sand, have the brake linings cleaned\
and checked.
These substances can cause glazing and uneven braking. Check th\
e body
structure, steering, suspension, wheels, tires, and exhaust syste\
m for damage.
Also, check the fuel lines and cooling system for any leakage.\

Your vehicle will require more frequent service due to off-road use.\
Refer to
the Maintenance Schedule for additional information.
Driving at Night
AN450005
Night driving is more dangerous than day driving. One reason is that some
drivers are likely
to be impaired-by alcohol or drugs, with night vision
problems, or by fatigue.
Here are some tips on night driving.
Drive defensively. Remember, this is the most dangerous time.
Don’t drink and drive (See “Drunken Driving” in the Index for more on
this problem.)
Adjust your inside rearview mirror to reduce the glare from headlights
behind you.
4-34

Downloaded from www.Manualslib.com manuals search engine . li 7. --
._ . .-
. .1 ..
Your Driving and the Road
Hill and Mountain Roads
I
AM470001
Driving on steep hills or mountains is different from driving in flat or rolling
terrain.
If you drive regularly in steep country, or if you're planning to visit
there, here are some tips that can make your trips safer and \
more enjoyable.
(See "Off-Road Driving" in the Index for information about driving off-road.)
Keep your vehicle in good shape. Check all fluid levels and also the
brakes, tires, cooling system and transmission. These parts can \
work
hard on mountain roads.
Know how to go down hills. The most important thing to know is this: let
your engine do some of the slowing down. Don't make your brak\
es do
it
all. Shift to a lower gear when you go down a steep or long hill. That
way, you will
slow down without excessive use of your brakes.
If you don't shift down, your brakes could get
so hot that they
wouldn't work well. You would then have poor braking or even none
going down a hill. You could crash. Shift down to let your engine
1 assist your brakes on a steep downhill slope.
4-46

Downloaded from www.Manualslib.com manuals search engine Your Driving and the Road
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re pulling a \
trailer. See
the Maintenance Schedule for more on this. Things that are esp\
ecially important in trailer operation are automatic transmission fluid (don’t ove\
rfill),
engine oil, axle lubricant, belt, cooling system, and brake adj\
ustment. Each of
these is covered in this manual, and the Index will help you find them
quickly.
If you’re trailering, it’s a good idea to review these sections before
you start your trip.
Check periodically to see that all hitch nuts and bolts are tight.
Trailer Light Wiring
See “Trailer Wiring Harness” in the Index.
Power Winches
If you wish to use a power winch on your vehicle, only use it when your
vehicle is stationary or anchored.
NOTICE
Use the regular brakes, set the parking brake Or UIWK ihe wheels IW keep
your vehicle from rolling.
4-62

Downloaded from www.Manualslib.com manuals search engine When you decide it's safe to lift the hood, here's what you'll see:
A. Coolant recovery tank
B. Radiator pressure cap
C. Engine fan
If the coolant inside the coolant recovery tank is boiling, don't do anything
else until it cools down.
The coolant level should be at or above the
ADD mark. If it isn't, you may
have a leak in the radiator hoses, heater hoses, radiator or water pump or
somewhere else in the cooling system.
CAUTION I
Heater and radiator hoses, and other engine parts, can be very\
hot.
Don't touch them.
If you do, you can be burned.
loose all coolant. That could cause an engine fire, and you could be
burned. Get any leak fixed before you drive the vehicle. run the engine
if there is a leak. If you run the engine, it could
NOTICF
If there seems
to be no leak, start the engine again to see if the fan runs
when the engine does.
If it doesn't, your vehicle needs service. Turn off the
engine.
5-1 1

Downloaded from www.Manualslib.com manuals search engine 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 the
ADD mark, add a 50/50 mixture of clean water (preferably distilled) and the
proper antifreeze at the coolant recovery tank. (See “Engine\
Coolant” in the Index for more information about the proper coolant mix.)
I CAUTION
4
Adding only plain water to your cooling system can be dangerous.
Rain water,
or some other liquid, like alcohill, 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 5Q/M mix of clean wafer and a proper antifreeze.
NOTICE
In cold weather, water can freeze and crack the en1
core and other
parts. Use the recommended coolan
*
I CAUTION
I I
You can be burned if you spill coolant on hot engine parts. Coolant
b contains ethylene glycol and it wil’l burn if the engine parts are hot
I’ enough. Don’t spill coolant on a hot engine.
When the coolant in the coolant recovery tank is at or above \
the
ADD mark,
start your vehicle.
If the overheat warning continues, there’s one more thing you c\
an try. You
can add the proper coolant mix directly to the radiator, but \
be sure the
cooling system
is cool before you do it.
A
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
radiator pressure cap-even a little-they can come out at high
speed. Never turn the pressure cap when the cooling system, including the radiator pressure cap, is hot. Wait for the cooling
system and radiator pressure cap
to cool if you ever have to turn
the pressure cap.
5-1 2

Downloaded from www.Manualslib.com manuals search engine KO71 7
How to Add Coolant to the Radiator
1. You can remove the radiator pressure cap when the cooling system,
including the radiator -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.
I
KO7
2. Then keep turning the pressure cap, but now push down as you \
turn it.
Remove the pressure cap.
5-1 3

Downloaded from www.Manualslib.com manuals search engine KO721
8. Then replace the pressure cap. Be sure the arrows on the pres\
sure cap line up like this.
Engine Fan Noise
This vehicle has a clutched engine cooling fan. When the clutch is engaged,
the fan spins faster to provide more air to cool the engine. In most every day
driving conditions the clutch is not engaged. This improves fue\
l economy and
reduces fan noise. Under heavy vehicle loading, trailer towing andlor high
outside temperatures, the fan speed increases when the clutch e\
ngages.
So
you may hear an increase in fan noise. This is normal and should not be
mistaken as the transmission slipping or making extra shifts.
It is merely the
cooling system functioning properly. The fan will slow down whe\
n additional
cooling is not required and the clutch disengages.
You may also hear this fan noise when you start the engine. It will go away
as the fan clutch disengages.
If a Tire Goes Flat
It’s unusual for a tire to “blowout” while you’re d\
riving, 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 pu\
lls 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.
5-1 5

Downloaded from www.Manualslib.com manuals search engine How to Check Lubricant:
i I
KO998
If the level is below the bottom of the filler plug hole, you’ll need to add
some lubricant.
If the differential is at operating temperature (warm), add enough lubricant to
raise the level
to the bottom of the filler plug hole.
If the differential is cold, add enough lubricant to raise the level to 1/2 inch
(12 mm) below the filler plug hole.
What to Use:
Refer to the Maintenance Schedule to determine what kind of lubricant to
use. See “Recommended Fluids and Lubricants” in the Index.\

Engine Coolant
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’’ in the Index.
The proper coolant
for your vehicle will:
Give freezing protection down to -20°F (-29°C) or -34°F (-37°C) for
Give boiling protection up to 258°F (125°C).
Canadian vehicles and vehicles with the cold climate option.
Protect against rust and corrosion.
Help keep
the proper engine temperature.
Let the warning lights and gages work as they should.
6-23

Downloaded from www.Manualslib.com manuals search engine t
..-
.I
Service & Appearance Care
What to Use:
Use a mixture of clean water (preferably distilled) and antifreeze that meets
“GM Specification 6038-M,” which won’t damage aluminum parts. Also use
GM Engine Coolant Supplement (sealer) with
a complete coolant change. If
you use these, you don’t need to add anything else.
I
Adding only plain water to your cooling system can be dangerous.
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
- Plain water, or some other liquid like alcohol, can boil before the
II a 50/50 mix of clean water and a proper antifreeze.
NOTICE
J use an improper coolant mix, your engine could overheat and be
badly damaged. The repair cost wouldn’t be covered by your warrant\
y
much water
in the mix can freeze and crack the engine, radiator, hea
core and other
part
Some conditions, such as air trapped in the cooling system, can affect the
coolant level in the radiator. Check the coolant level when th\
e engine is cold
and follow the steps under “Adding Coolant” for the prope\
r way to add
coolant.
If you have to add coolant more than four times a year, have your dealer
check your cooling system.
’‘ you use the proper coolant, you don’t have to add extra inhibitors c-
auditives which claim to improve the system. These can be harmful. ~ ~~~~~
6-24

Downloaded from www.Manualslib.com manuals search engine Windshield Wiper Blade Inserts
i
.. i. KO637 .. .,' :-, ;iyy ?-is;+;.-, &!!f$i& . l'jf:. j<-:q;* j';gi3f47!:;I' b,(..;',$< t&..YT:i;; ;.l:z~ .''! ..' :.. y.?;i'!g.tyz , . ..
o rep ace your wlndshleld wiper blade inserts, lift the wiper ar\
m away from
the windshield. Pinch the
two tabs on the wiper arm and slide the insert out
of the bl'ade. Slide the new one in place. Make sure the tabs are locked into
position.
Air Conditioning
Every now and then have your dealership check your alr conditi\
oning system
to be sure it has not lost any cooling ability. If you think the system is not
working prope'rly, have your dealership check
it out as soon as possible.
The air conditioning will not work when the temperature is below
40°F (4°C).
Lubrication
Accelerator Control System
Refer to the Maintenance Schedule to determine how often the accelerator
linkage pivot points must be lubricated and what type
of lubricant to use.
Accelerator cables and cruise control cables should not be lubr\
icated. Any
cables that are worn or are hard
to pull should be replaced.
When cleaning the engine compartment with water or steam, avoid\
directing
the flow onto the throffle linkage in a manner that would cause moisture
to
enter the cables.