Engine CHEVROLET MONTE CARLO 2003 6.G Repair Manual

Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that will help
prevent engine and fuel system deposits from forming,
allowing your emission control system to work
properly. You should not have to add anything to your
fuel. Gasolines containing oxygenates, such as
ethers and ethanol, and reformulated gasolines may be
available in your area to contribute to clean air.
General Motors recommends that you use these
gasolines, particularly if they comply with the
speci®cations described earlier.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage would not be covered under
your warranty.Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. General Motors does
not recommend the use of such gasolines. Fuels
containing MMT can reduce the life of spark plugs and
the performance of the emission control system may
be affected. The malfunction indicator lamp may turn on.
If this occurs, return to your authorized GM dealer for
service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard
to ®nd. Never use leaded gasoline or any other fuel
not recommended in the previous text on fuel. Costly
repairs caused by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you will be driving.
5-6

Checking Things Under
the Hood
{CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not
running. Keep hands, clothing and tools away
from any underhood electric fan.
{CAUTION:
Things that burn can get on hot engine parts
and start a ®re. These include liquids like fuel,
oil, coolant, brake ¯uid, windshield washer and
other ¯uids, and plastic or rubber. You or
others could be burned. Be careful not to drop
or spill things that will burn onto a hot engine.
Hood Release
To open the hood do the following:
1. Pull the handle located
inside the vehicle near
the parking brake
pedal.
5-10

Engine Compartment Overview
When you open the hood on the 3400 V6 (Code E) engine, you'll see the following:
5-12

A. Windshield Washer Fluid Reservoir. SeeWindshield
Washer Fluid on page 5-43.
B. Battery. See
Battery on page 5-47.
C. Remote Positive (+) Terminal. See
Jump Starting on
page 5-48.
D. Upper Underhood Fuse Block. See ªUpperhood
Fuse Block (Upper)º under
Fuses and Circuit
Breakers on page 5-91.
E. Lower Underhood Fuse Block. See ªUnderhood
Fuse Block (Lower)º under
Fuses and Circuit
Breakers on page 5-91.
F. Radiator Pressure Cap. See
Radiator Pressure Cap
on page 5-29.
G. Engine Coolant Recovery Tank. See
Cooling System
on page 5-32.
H. Power Steering Fluid Reservoir. See
Power Steering
Fluid on page 5-42.I. Electric Cooling Fan. See
Cooling System on
page 5-32.
J. Engine Oil Fill Cap. See ªChecking Engine Oilº
under
Engine Oil on page 5-16.
K. Engine Oil Dipstick. See ªChecking Engine Oilº
under
Engine Oil on page 5-16.
L. Bleed Valves (underneath engine shield). See ªHow
to Add Coolant to the Radiatorº under
Cooling
System on page 5-32.
M. Transaxle Fluid Dipstick. See
Automatic Transaxle
Fluid on page 5-24.
N. Brake Master Cylinder Reservoir. See
Brakes on
page 5-44.
O. Engine Air Cleaner/Filter. See
Engine Air
Cleaner/Filter on page 5-22.
5-13

When you open the hood on the 3800 V6 (Code K) engine, you'll see the following:
5-14

A. Windshield Washer Fluid Reservoir. SeeWindshield
Washer Fluid on page 5-43.
B. Battery. See
Battery on page 5-47.
C. Remote Positive (+) Terminal. See
Jump Starting on
page 5-48.
D. Upper Underhood Fuse Block. See ªUpperhood
Fuse Block (Upper)º under
Fuses and Circuit
Breakers on page 5-91.
E. Lower Underhood Fuse Block. See ªUnderhood
Fuse Block (Lower)º under
Fuses and Circuit
Breakers on page 5-91.
F. Radiator Pressure Cap. See
Radiator Pressure Cap
on page 5-29.
G. Engine Coolant Recovery Tank. See
Cooling System
on page 5-32
H. Power Steering Fluid Reservoir (low in engine
compartment). SeePower Steering Fluid on
page 5-42.I. Electric Cooling Fan. See
Cooling System on
page 5-32.
J. Engine Oil Dipstick. See ªChecking Engine Oilº
under
Engine Oil on page 5-16.
K. Engine Oil Fill Cap. See ªChecking Engine Oilº
under
Engine Oil on page 5-16.
L. Bleed Valves (underneath engine shield). See ªHow
to Add Coolant to the Radiatorº under
Cooling
System on page 5-32.
M. Transaxle Fluid Dipstick. See
Automatic Transaxle
Fluid on page 5-24.
N. Brake Master Cylinder Reservoir. See
Brakes on
page 5-44.
O. Engine Air Cleaner/Filter. See
Engine Air
Cleaner/Filter on page 5-22.
5-15

Engine Oil
Checking 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.
The engine oil dipstick handle is the yellow loop located
near the front of the engine. See
Engine Compartment
Overview on page 5-12for more information on location.
Turn off the engine and give the oil several minutes to
drain back into the oil pan. If you don't, the oil
dipstick might not show the actual level.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 down, and check the level.
3400 (Code E)
V6 Engine
3800 (Code K) Engine
3400 (Code E) V6 Engine
3800 (Code K) V6 Engine
5-16

When to Add Engine Oil
If the oil is at or below the cross-hatched area at the tip
of the dipstick, then you'll need to add at least one
quart of oil. But you must use the right kind. This part
explains what kind of oil to use. For engine oil crankcase
capacity, see
Capacities and Speci®cations on
page 5-98.
Notice:Don't add too much oil. If your engine has
so much oil that the oil level gets above the
cross-hatched area that shows the proper operating
range, your engine could be damaged.
The engine oil ®ll cap is located toward the front of the
engine near the yellow-looped engine oil dipstick
handle. See
Engine Compartment Overview on
page 5-12for more information on location.
Be sure to ®ll it enough to put the level somewhere in
the proper operating range in the cross-hatched
area. Push the dipstick all the way back in when
you're through.3400 (Code E) V6
Engine
3800 (Code K) V6
Engine
5-17

What Kind of Engine Oil to Use
Oils recommended for your vehicle can be identi®ed by
looking for the starburst symbol.
This symbol indicates that the oil has been certi®ed by
the American Petroleum Institute (API). Do not use
any oil which does not carry this starburst symbol.
If you choose to perform
the engine oil change
service yourself, be sure
the oil you use has
the starburst symbol on
the front of the oil
container. If you have your
oil changed for you, be
sure the oil put into
your engine is American
Petroleum Institute certi®ed
for gasoline engines.
You should also use the proper viscosity oil for your
vehicle, as shown in the viscosity chart.
3400 (Code E) V6 Engine
5-18

As in the chart shown previously, if you have the
3400 V6 engine, SAE 5W-30 is the only viscosity grade
recommended for your vehicle. You should look for
and use only oils which have the API Starburst symbol
and which are also identi®ed as SAE 5W-30. If you
cannot ®nd such SAE 5W-30 oils, you can use an
SAE 10W-30 oil which has the API Starburst symbol, if
it's going to be 0ÉF (-18ÉC) or above. Do not use
other viscosity grade oils, such as SAE 10W-40 or
SAE 20W-50 under any conditions.
As shown in the following chart, if you have the
3800 V6 engine, SAE 10W-30 is the viscosity grade
recommended for your vehicle. However, you can use
SAE 5W-30 if it's going to be colder than 60ÉF
(16ÉC) before your next oil change. When it's very cold,
colder than 0ÉF (-18ÉC), you should use an SAE 5W-30
oil. These numbers on an oil container show its
viscosity, or thickness. Do not use other viscosity grade
oils, such as SAE 10W-40 or SAE 20W-50 under any
conditions.
3800 (Code K) V6 Engine
5-19