2007 CHEVROLET COBALT engine

Brakes
Brake Fluid
The brake master
cylinder and, on manual
transmission vehicles,
the clutch hydraulic
system use the same
reservoir. The reservoir
is lled with DOT-3
brake uid.
SeeEngine Compartment Overview on page 290
for the location of the reservoir.
There are only two reasons why the brake uid
level in the reservoir might go down. The rst is that
the brake uid goes down to an acceptable level
during normal brake lining wear. When new linings
are put in, the uid level goes back up. The other
reason is that uid is leaking out of the brake and/or
clutch hydraulic system. If it is, you should have
the brake and/or clutch system xed, since a leak
means that sooner or later the brakes and/or clutch
will not work well.So, it is not a good idea to top off the brake/clutch
uid. Adding uid will not correct a leak. If you
add uid when the brake linings are worn, you
will have too much uid when you get new brake
linings. You should add or remove uid, as
necessary, only when work is done on the
brake/clutch hydraulic system.
{CAUTION:
If your vehicle has too much brake uid, it
can spill on the engine. The uid will burn
if the engine is hot enough. You or others
could be burned, and your vehicle could
be damaged. Add brake uid only when
work is done on the brake and/or clutch
hydraulic system.
When the brake uid falls to a low level, the brake
warning light will come on. SeeBrake System
Warning Light on page 171.
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What to Add
When you do need brake uid, use only DOT-3
brake uid. Use new brake uid from a sealed
container only. SeeRecommended Fluids
and Lubricants on page 406.
Always clean the brake uid reservoir cap and the
area around the cap before removing it. This
will help keep dirt from entering the reservoir.
{CAUTION:
With the wrong kind of uid in the
brake/clutch system, the brakes/clutch
may not work well. This could cause a
crash. Always use the proper brake uid.Notice:
Using the wrong uid can badly damage
brake/clutch system parts. For example, just
a few drops of mineral-based oil, such as
engine oil, in the brake/clutch hydraulic
system can damage brake/clutch system
parts so badly that they will have to be
replaced. Do not let someone put in the
wrong kind of uid.
If you spill brake uid on your vehicle’s
painted surfaces, the paint nish can be
damaged. Be careful not to spill brake uid
on your vehicle. If you do, wash it off
immediately. SeeWashing Your Vehicle
on page 377.
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The remote positive
terminal is located
under a red tethered
cap on the engine
compartment fuse block.
Lift the cap to access
the terminal.
The remote negative (−)
ground terminal, marked
GND (−), is located
behind the engine
coolant surge tank.SeeEngine Compartment Overview on
page 290for more information on the location
of the positive (+) and negative (−) terminals
on your vehicle.
{CAUTION:
An electric fan 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.
324

{CAUTION:
Using a match near a battery can cause
battery gas to explode. People have been
hurt doing this, and some have been
blinded. Use a ashlight if you need
more light.
Be sure the battery has enough water.
You do not need to add water to the battery
installed in your new vehicle. But if a
battery has ller caps, be sure the right
amount of uid is there. If it is low, add
water to take care of that rst. If you don’t,
explosive gas could be present.
Battery uid contains acid that can
burn you. Do not get it on you. If you
accidentally get it in your eyes or on your
skin, ush the place with water and get
medical help immediately.
{CAUTION:
Fans or other moving engine parts can
injure you badly. Keep your hands away
from moving parts once the engine is
running.
5. Check that the jumper cables do not have
loose or missing insulation. If they do, you
could get a shock. The vehicles could
be damaged too.
Before you connect the cables, here are some
basic things you should know. Positive (+) will
go to positive (+) or to a remote positive (+)
terminal if the vehicle has one. Negative (−) will
go to a heavy, unpainted metal engine part or
to a remote negative (−) terminal if the vehicle
has one.
Do not connect positive (+) to negative (−)or
you will get a short that would damage the
battery and maybe other parts too. And do
not connect the negative (−) cable to the
negative (−) terminal on the dead battery
because this can cause sparks.
325

6. Connect the red positive (+) cable to the
positive (+) terminal location on the vehicle
with the dead battery. Use a remote
positive (+) terminal if the vehicle has one.
7. Do not let the other end touch metal. Connect
it to the positive (+) terminal of the good
battery. Use a remote positive (+) terminal
if the vehicle has one.
8. Now connect the black negative (−) cable to
the negative (−) terminal of the good battery.
Use a remote negative (−) terminal if the
vehicle has one.
Do not let the other end touch anything until the
next step. The other end of the negative (−)
cable does not go to the dead battery. It goes
to a heavy, unpainted metal engine part or to a
remote negative (−) terminal on the vehicle with
the dead battery.9. Connect the other end of the negative (−)
cable to the negative (−) terminal location
on the vehicle with the dead battery.
Your vehicle has a remote negative (−)
terminal marked GND (−).
10. Now start the vehicle with the good battery
and run the engine for a while.
11. Try to start the vehicle that had the dead
battery. If it will not start after a few tries,
it probably needs service.
Notice:If the jumper cables are connected or
removed in the wrong order, electrical shorting
may occur and damage the vehicle. The repairs
would not be covered by your warranty. Always
connect and remove the jumper cables in the
correct order, making sure that the cables do
not touch each other or other metal.
326

A. Heavy, Unpainted Metal Engine Part or
Remote Negative (−) Terminal (GND)
B. Good Battery or Remote Positive (+) and
Remote Negative (−) Terminals
C. Dead Battery or Remote Positive (+) TerminalTo disconnect the jumper cables from both
vehicles, do the following:
1. Disconnect the black negative (−) cable from
the vehicle that had the dead battery.
2. Disconnect the black negative (−) cable from
the vehicle with the good battery.
3. Disconnect the red positive (+) cable from the
vehicle with the good battery.
4. Disconnect the red positive (+) cable from the
other vehicle.
5. Return the positive (+) terminal cover to its
original position.
Jumper Cable Removal
327

(G) TPC Spec (Tire Performance Criteria
Specication):Original equipment tires designed
to GM’s specic tire performance criteria have
a TPC specication code molded onto the sidewall.
GM’s TPC specications meet or exceed all
federal safety guidelines.
Tire Size
The following illustration shows an example of a
typical passenger vehicle tire size.
(A) Passenger (P-Metric) Tire:The United
States version of a metric tire sizing system.
The letter P as the rst character in the tire size
means a passenger vehicle tire engineered
to standards set by the U.S. Tire and Rim
Association. A tire size without the letter P as the
rst character is certied to European standards.(B) Tire Width:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 60,
as shown in item C of the illustration, it would
mean that the tire’s sidewall is 60 percent as high
as it is wide.
(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire. The
letter R means radial ply construction; the letter D
means diagonal or bias ply construction; and the
letter B means belted-bias ply construction.
(E) Rim Diameter:Diameter of the wheel in inches.
(F) Service Description:These characters
represent the load range and speed rating of
the tire. The load index represents the load
carry capacity a tire is certied to carry. The
load index can range from 1 to 279. The speed
rating is the maximum speed a tire is certied
to carry a load. Speed ratings range from A to Z.
343

{CAUTION:
Changing a tire can be dangerous. The
vehicle can slip off the jack and roll over
or fall on you or other people. You and
they could be badly injured or even killed.
Find a level place to change your tire.
To help prevent the vehicle from moving:
1. Set the parking brake rmly.
2. Put an automatic transaxle shift lever
in PARK (P), or shift a manual
transaxle to FIRST (1) or REVERSE (R).
3. Turn off the engine and do not restart
while the vehicle is raised.
4. Do not allow passengers to remain in
the vehicle.
To be even more certain the vehicle will not
move, you should put blocks at the front
and rear of the tire farthest away from the
one being changed. That would be the tire
on the other side, at the opposite end of
the vehicle.When you have a at tire, use the following
example as a guide to assist you in the placement
of wheel blocks.
The following information will tell you how to use
the jack and change a tire.
359