radiator CHEVROLET SUBURBAN 1994 User Guide

While filling the surge tank, watch to see if coolant begins to stream out
the air bleed valve. When coolant begins to stream out, close the valve.
5. With the air bleed
valve closed and
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 fan(
s).
6. 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 the
COLD mark.
7. Then replace the
pressure cap.
Be
sure the arrows
on the pressure
cap line up like
this.
5-23
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What to Use
use a mixture of one-half clean water (preferably distilled) and one-half
antifreeze that meets
“GM Specification 6038-M,” which won’t damage
aluminum
parts. You can also use a recycled coolant conforming to “GM
Specification 6038-M” with a complete coolant flush and refill. If you use
this mixture, you don’t need
to add anything else.
NOTICE:
If you use an improper coolant mix, your engine could overheat
and be badly damaged. The repair cost wouldn’t be covered by
your warranty.
TOO much water in the mix can freeze and crack
the engine, radiator, heater core and other parts.
Some conditions, such as air trapped in the cooling system, can affect the
coolant level in the radiator. Check the coolant level when the engine is cold
and follow the steps under “Adding Coolant” for
the proper way to add
coolant.
If you have to add coolant more than four times a year, have your dealer
check your cooling system.
NOTICE:
If you use the proper coolant, you don’t have to add extra
inhibitors
or additives which claim to improve the system. These
can be harmful.
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Radiator Pressure Cap-Gas Engines
I I
The radiator pressure
cap must be tightly
installed with the
arrows on the cap
lined up with the
ovefflow tube on the
radiator filler neck.
NOTICE:
Your radiator cap is a 15 psi (105 kPa) pressure-type cap and
must be tightly installed
to prevent coolant loss and possible
engine damage from overheating. Be sure the arrows on the cap
line up with the overflow tube on the radiator filler neck.
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Surge Tank Pressure Cap- Diesel Engines
The surge tank
pressure cap must be
tightly installed with
the arrows
on the cap
lined up with the top
tube
of the coolant
surge tank.
NOTICE:
Your surge tank pressure cap 1s a unique 15 psi (105 kPa)
pressure-type cap for use with surge tank cooling systems only.
It must be tightly installed to prevent coolant loss and possible
engine damage from overheating. Be sure the arrows on the cap
line up with the top tube
of the coolant surge tank.
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
I NOTICE:
Always turn the engine off before checking or adding power
steering
fluid. The power steering pump cap is close to the fan
and other moving parts.
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Hydro-Boost Brake System (Hydraulic Pump)
The power steering pump is also used as the Hydro-boost pump. Refer to
“Power Steering System” in this section when checking fluid level
or
adding fluid.
Windshield Washer Fluid
To Add
Open the cap labeled
“WASHER
FLUID
ONLY.” Add washer
fluid until the bottle is
full.
~ NOTICE:
0 When using concentrated washer fluid, follow the
manufacturer’s instructions for adding water.
Don’t mix water with ready-to-use washer fluid. Water can
cause the solution to freeze and damage your washer fluid
tank and other parts of the washer system. Also, water
doesn’t clean as well
as washer fluid.
Fill your washer fluid tank only 3/4 full when it’s very cold.
This allows for expansion, which could damage the tank
if it is
completely full.
Don’t use radiator antifreeze in your windshield washer. It
can damage your washer system and paint.
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NOTICE:
Avoid touching the bulb or letting it come in contact with
anything damp. Oil from
your skin or moisture on the bulb can
cause the bulb to explode when it is turned on. If either comes in
contact with the bulb, clean
it with alcohol or a suitable
degreaser and wipe the bulb dry.
Composite Headlights
.' --6n k
'I
i 1. Remove the two
screws at the top
of the radiator
support.
2. Pull the headlight
lens assembly
out.
3. Unplug the
electrical
connector.
4. Turn the bulb to
the left and
remove it.
5. Put the new bulb in the lens assembly and turn it to the right until it is
6. Plug in the electrical connector.
7. Put the headlight lens assembly back into the vehicle. Install and
tight.
tighten the two screws.
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Service Replacement Part and Filter
Recommendations -Gas Engines
Engine
VIN
Oil Filter
Air Cleaner Filter
PCV Valve
Spark Plugs‘%
Fuel Filter
Radiator Cap
5.7L
K
PF353‘
A348C
cv774c
.CR43TS
GF48 1
RC36
$Four Wheel Drive Vehicle -use a
PFS 1 oil filter
*Use AC copper-cored resister type spark plugs
Service Replacement Part and Filter
Recommendations -Diesel Engines
Engine
VIN
Oil Filter
Air Cleaner
Fuel Filter
Surge Tank Cap 6.5L
S”
PF3S
A917C
TP
I 006
RC33
7.4L
N
PF35
A348C
cv774c
.CR43TS
GF48
I
RC36
6.5L
F”
PF35
A9 17C
TP
1006
RC33
*Heavy Duty Emission Engine
Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same. If the air conditioning
system
in your vehicle needs refrigerant, be sure the proper refrigerant is
used. If you’re not sure, ask your GM dealer. For additional information, see
your “Warranty and Owner Assistance Information” booklet.
Air Conditioning Refrigerant Capacity
TYPE
Refrigerant R 134A
Refrigerant
R 134A
QTY
Front A/C 3.0 lbs. (1.360 kg)
Front and Rear A/C
4.25 Ibs. (I .927 kg)
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Explanation Of Scheduled Maintenance Services
Below are explanations of the services listed in the maintenance charts.
The proper fluids and lubricants to
use are listed in this section. Make sure
whoever services your vehicle uses these.
All parts should be replaced and
all necessary repairs done before you or anyone else drives the vehicle.
1. ENGINE OIL AND OIL FILTER CHANGE* -ALWAYS USE SH
ENERGY CONSERVIJTG TI (GASOLINE ENGINE) OR CF-4/SH
(DIESEL ENGINE) QUALITY OILS OF THE PROPER VISCOSITY.
To determine the preferred viscosity oil for your vehicle’s engine
(e.g.
SAE 5W-30 or low-30), see “Engine Oil” in the Index.
2. CHASSIS LUBRICATION - Lubricate the front suspension, king
pin bushings, steering linkage, transmission, and transfer case shift
linkage, parking brake cable guides, rear driveline center splines and
front axle propshaft splines, brake pedal springs, and clutch pedal
springs at the intervals specified.
Ball joints and king pin bushings should not be lubricated unless their
temperature is
10°F (-12”C), or higher. When the weather is cold, let
them warm up before lubrication or they could be damaged.
Also, be sure to check all the vehicle fluid levels at this time.
3. CLUTCH FORK BALL STUD LUBRICATION (5-SPEED
MANUAL TRANSMISSION
WITH DEEP LOW ) - Not
applicable to utility or wagon models.
4. COOLING SYSTEM SERVICE*? - Drain, flush and refill system
with new coolant. See “Engine Coolant’’
in the Index for the proper
coolant and mixture to use
in your vehicle.
Also inspect the hoses and replace them
if they are cracked, swollen, or
deteriorated. Tighten all
hose clamps (except constant tension clamps).
Remove debris and clean
the outside of the radiator and air
conditioning condenser. Wash the radiator
neck. To ensure proper
operation, pressure test the radiator and cap.
5. AIR CLEANER FILTER REPLACEMENT* - Replace at every
30,000 miles (50 000 km) or more often under dusty conditions. Ask
your dealer for the proper replacement intervals
for your driving
conditions.
6. FRONT WHEEL BEARING REPACK (2-WHEEL DRIVE
ONLY)
- Clean and repack the front wheel bearings at each brake
relining, or at the specified interval, whichever comes first.
4’ An Emission Control Service
*A fluid loss in these systems may indicate a problem. Have them
inspected and repaired at once.
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FanNoise ...................................................... 5-24
Filter Replacement Chart .......................................... 6-83
Finish Care
........................................................ 6-69
Damage
..................................................... 6-76
Automatic Transmission
........................................ 6-28
Brake
....................................................... 6-44
Capacities ................................................... 6-82
Coolant
..................................................... 5-11
FrontAxle ................................................... 6-35
Hydraulicclutch
.............................................. 6-33
Leakcheck .................................................. 6-48
ManualTransmission
.......................................... 6-31
Power Steering
............................................... 6-40
Radiator
..................................................... 5-16
Rear Axle ................................................... 6-34
Recommended Fluids
.......................................... 7-25
Transfer Case
........................................... 2-33, 6-34
Windshield Washer
....................................... 2-41, 6-42
Four-wheel Drive
.......................................... 2-32, 6-34
Transfer Case
........................................... 2-33, 6-34
FrontAxle
................................................... 6-35
Fuel
........................................................... 6-4
FillingYourTank ............................................. 6-12
Foreign Countries
............................................. 6-12
Gage
....................................................... 2-74
Gasolines for Cleaner
Air ........................................ 6-5
Tankcapacity
................................................ 6-82
Fuses and Circuit Breakers
................................... 6-56, 6-85
FuseBlock
.................................................. 6-57
Headlights
................................................... 6-56
Power Windows
and Other Power Options ......................... 6-57
Trailer Wiring Harness
......................................... 6-57
Windshield Wipers
............................................ 6-56
Fluid
G
Gages ......................................................... 2-74
Coolant Temperature Gage
...................................... 2-75
FuelGage
................................................... 2-74
Odometer
................................................... 2-65
Oil Pressure Gage ............................................. 2-76
Speedometer
................................................. 2-67
Tachometer
.................................................. 2-66
Trip Odometer
................................................ 2-65
Voltmeter
.................................................... 2-77
GloveBox
..................................................... 2-56
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Odometer ...................................................... 2-65
Off-Road Driving (See "Driving")
Oil
...................................................... 6-16.6-22
Additives
............................................... 6-21, 6-26
Off-Road Recovery
........................................... 4-23
Disposal
of Used ......................................... 6-2 I, 6-26
Pressure Gage
................................................ 2-76
ToCheck
............................................... 6-16.6-22
What Kind to
Use ........................................ 6-17. 6-24
Whe~ltoAdd ............................................ 6-16, 6-23
Whentochange
......................................... 6-21. 6-26
Owner Checks and Services
........................................ 7-22
Parking Over Things That Burn
......................................... 2-27
Torque Lock (Automatic Transmission)
....................... 2-27 . 4-52
Your Vehicle (Manual Transmission)
.............................. 2-30
Periodic Maintenance Inspections
................................... 7-18
Steering
...................................................... 4-7
Steering Fluid
................................................ 6-40
Winches
..................................................... 4-64
Product Service Publications ........................................ 8-7
Parkin,o Brake
................................................... 2-26
Passin! Other Vehicles
............................................. 4-9
Power DoorLocks
.................................................. 2-15
Radiator Pressure Cap ............................................ 6-39
Radio (see "Audio Systems")
RearWindowDefogger
........................................... 3-11
Recommended Fluids and Lubricants ................................ 7-25
Recovery Hooks
................................................. 5-32
Replacement Parts ............................................... 6-81
Reporting Safety Defects ........................................... 8-5
Road Signs ...................................................... 4-2
Roadside Assistance ............................................... 8-5
RockingYourVehicle ............................................ 5-40
Safety Belts
..................................................
Adults ......................................................
Center Passenger Position .......................................
Cleaning ....................................................
Checking Restraint System ......................................
Child Restraints ...............................................
Children ....................................................
DriverPosition ...............................................
1-13
1-18
1-27
6-73 1-43
1-33
1-31
1-19
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