2011 CADILLAC CTS engine

Black plate (11,1)Cadillac CTS/CTS-V Owner Manual - 2011
Vehicle Care 10-11
Engine Oil
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
.Always use engine oil approved
to the proper specification and of
the proper viscosity grade. See
“Selecting the Right Engine Oil.”
.Check the engine oil level
regularly and maintain the
proper oil level. See“Checking
Engine Oil” and“When to Add
Engine Oil.”
.Change the engine oil at the
appropriate time. See Engine Oil
Life System on page 10‑14.
.Always dispose of engine oil
properly. See “What to Do With
Used Oil.”
Checking Engine Oil
It is a good idea to check the engine
oil level at each fuel fill. 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 a
yellow loop. See Engine
Compartment Overview
on
page 10‑6for the location of the
engine oil dipstick.
1. If the engine has been running
recently, turn off the engine and
allow several minutes for the oil
to drain back into the oil pan.
Checking your oil level too soon
after engine shutoff will not
provide an accurate oil level
reading. 2. 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.
When to Add Engine Oil
If the oil is below the cross-hatched
area at the tip of the dipstick, add at
least one liter/quart of the
recommended oil. See “Selecting
the Right Engine Oil” for an
explanation of what kind of oil to
use. For engine oil crankcase
capacity, see Capacities and
Specifications on page 12‑2.

Black plate (12,1)Cadillac CTS/CTS-V Owner Manual - 2011
10-12 Vehicle Care
Notice:Do not add too much oil.
Oil levels above or below the
acceptable operating range
shown on the dipstick are harmful
to the engine. If you find that you
have an oil level above the
operating reange, i.e. the engine
has so much oil that the oil level
gets above the cross-hatched
area that shows the proper
operating range, the engine could
be damaged. You should drain
out the excess oil or limit your
driving of the vehicle and seek a
service professional to remove
the excess amount of oil.
See Engine Compartment Overview
on page 10‑6for the location of the
engine oil fill cap.
Add enough oil to put the level
somewhere in the proper operating
range. Push the dipstick all the way
back in when through.
Selecting the Right Engine Oil
Selecting the right engine oil
depends on both the proper oil
specification and viscosity grade:
.Specification
Use and ask for engine oils with
the dexos™ certification mark.
Oils meeting the requirements of
your vehicle should have the
dexos™ certification mark on the
container. This certification mark
indicates that the oil has been
approved to the dexos™
specification.
Your vehicle was filled at the factory
with dexos™ approved engine oil.
Notice: Use only engine oil that is
approved to the dexos™
specification or an equivalent
engine oil of the appropriate
viscosity grade. Engine oils
approved to the dexos™
specification will show the
dexos™ symbol on the container.
Failure to use the recommended
engine oil or equivalent can result
in engine damage not covered by
the vehicle warranty. If you are
unsure whether your oil is
approved to the dexos™
specification, ask your service
provider.

Black plate (13,1)Cadillac CTS/CTS-V Owner Manual - 2011
Vehicle Care 10-13
Use of Substitute Engine Oils if
dexos™is unavailable: In the
event that dexos™ approved
engine oil is not available at an oil
change or for maintaining proper
oil level, you may use substitute
engine oil displaying the API
Starburst symbol and of
SAE 5W-30 viscosity grade. Use
of oils that do not meet the
dexos™ specification, however,
may result in reduced
performance under certain
circumstances.
.Viscosity Grade
SAE 5W-30 is best viscosity
grade for the vehicle. Do not use
other viscosity grade oils such
as SAE 10W‐30, 10W‐40,
or 20W-50.
Cold Temperature Operation: In
an area of extreme cold, where
the temperature falls
below −29°C (−20°F), an
SAE 0W-30 oil should be used.
An oil of this viscosity grade will
provide easier cold starting for
the engine at extremely low
temperatures. When selecting
an oil of the appropriate viscosity
grade, be sure to always select
an oil that meets the required
specification, dexos™. See
“Specification” for more
information.
Engine Oil Additives/Engine
Oil Flushes
Do not add anything to the oil. The
recommended oils that meet the
dexos™ certification mark are all
that is needed for good performance
and engine protection.
Engine oil system flushes are not
recommended and could cause
engine damage not covered by the
vehicle warranty.

Black plate (14,1)Cadillac CTS/CTS-V Owner Manual - 2011
10-14 Vehicle Care
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer system
that indicates when to change the
engine oil and filter. This is based
on engine revolutions and engine
temperature, and not on mileage.
Based on driving conditions, the
mileage at which an oil change is
indicated can vary considerably. For
the oil life system to work properly,
the system must be reset every time
the oil is changed.
When the system has calculated
that oil life has been diminished, it
indicates that an oil change is
necessary. A“Change Engine Oil
Soon” message comes on. See
Engine Oil Messages
on
page 5‑35. Change the oil as soon
as possible within the next 1 000 km
(600 miles). It is possible that,
if driving under the best conditions,
the oil life system might not indicate
that an oil change is necessary for
over a year. However, the engine oil
and filter must be changed at least once a year and at this time the
system must be reset. Your dealer
has trained service people who will
perform this work using genuine
parts and reset the system. It is also
important to check the oil regularly
and keep it at the proper level.
If the system is ever reset
accidentally, the oil must be
changed at 5 000 km (3,000 miles)
since the last oil change.
Remember to reset the oil life
system whenever the oil is changed.
How to Reset the Engine Oil
Life System
Reset the system whenever the
engine oil is changed so that the
system can calculate the next
engine oil change. To reset the
system:
1. Turn the ignition to ON/RUN with
the engine off.
2. Fully press and release the accelerator pedal three times
within five seconds. The system is reset when the
“Change Engine Oil Soon”
message
goes off.
What to Do with Used Oil
Used engine oil contains elements
that can be unhealthy for your skin
and could even cause cancer. Do
not let used oil stay on your skin.
Clean your skin and nails with soap
and water, or a good hand cleaner.
Wash or properly dispose of clothing
or rags. See the manufacturer's
warnings about the use and
disposal of oil products.
Used oil can be a threat to the
environment. If you change your
own oil, be sure to drain all the oil
from the filter before disposal. Never
dispose of oil by putting it in the
trash, pouring it on the ground, into
sewers, or into streams or bodies of
water. Recycle it by taking it to a
place that collects used oil.

Black plate (15,1)Cadillac CTS/CTS-V Owner Manual - 2011
Vehicle Care 10-15
Automatic Transmission
Fluid
How to Check Automatic
Transmission Fluid
It is not necessary to check the
transmission fluid level.
A transmission fluid leak is the only
reason for fluid loss. If a leak
occurs, take the vehicle to the
dealer service department and have
it repaired as soon as possible.
The vehicle is not equipped with a
transmission fluid level dipstick.
There is a special procedure for
checking and changing the
transmission fluid. Because this
procedure is difficult, it should be
done at the dealer service
department. Contact your dealer for
additional information or refer to the
procedure in the service manual. To
purchase a service manual, see
Service Publications Ordering
Information on page 13‑14.Change the fluid and filter at the
intervals listed in
Scheduled
Maintenance
on page 11‑3, and be
sure to use the fluid listed in
Recommended Fluids and
Lubricants on page 11‑7.
Manual Transmission
Fluid
It is not necessary to check the
manual transmission fluid level.
A transmission fluid leak is the only
reason for fluid loss. If a leak
occurs, take the vehicle to a dealer
for service. Have it repaired as soon
as possible. You may also have the
fluid level checked by your dealer
when the oil is changed. See
Recommended Fluids and
Lubricants
on page 11‑7for the
proper fluid to use.
Hydraulic Clutch
It is not necessary to regularly
check clutch fluid unless you
suspect there is a leak in the
system. Adding fluid will not correct
a leak. A fluid loss in this system
could indicate a problem. Have the
system inspected and repaired.
When to Check and What
to Use
The hydraulic clutch fluid reservoir
cap has this symbol on it. See
Engine Compartment Overview
on
page 10‑6for reservoir location.

Black plate (16,1)Cadillac CTS/CTS-V Owner Manual - 2011
10-16 Vehicle Care
Refer to the Maintenance Schedule
for the proper fluid to use. See
Recommended Fluids and
Lubricants
on page 11‑7. The fluid
requires changing every two years.
See Scheduled Maintenance
on
page 11‑3.
How to Check and Add Fluid
Visually check the clutch fluid
reservoir to make sure the fluid level
is at the MIN (minimum) line on the
side of the reservoir. The hydraulic
clutch fluid system should be closed
and sealed.
Do not remove the cap to check the
fluid level or to top‐off the fluid level.
Remove the cap only when
necessary to add the proper fluid
until the level reaches the MIN line.
Engine Air Cleaner/Filter
The engine air cleaner/filter is in the
engine compartment on the driver
side of the vehicle, near the front.
See Engine Compartment Overview
on page 10‑6for more information
on location.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the
Maintenance IIintervals and replace
it at the first oil change after each
80 000 km (50,000 mile) interval.
See Scheduled Maintenance
on
page 11‑3for more information.
If you are driving in dusty/dirty
conditions, inspect the filter at each
engine oil change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter,
remove the filter from the vehicle
and lightly shake the filter to release
loose dust and dirt. If the filter
remains caked with dirt, a new filter
is required.
To inspect or replace the engine air
cleaner/filter:
1. Turn the ignition off.
2. Remove the side cover by
pulling up on the front of the
cover.

Black plate (18,1)Cadillac CTS/CTS-V Owner Manual - 2011
10-18 Vehicle Care
8. Remove the air cleaner filterfrom the air cleaner housing.
How to Reinstall Engine Air
Cleaner/Filter
1. Install the air cleaner into the aircleaner housing. The outer air
cleaner filter seal must be fitted
properly in the air cleaner
housing.
2. Align the air cleaner housing cover tabs to the air cleaner
housing. 3. Install the air cleaner housing
cover.
4. Install the air cleaner housing cover screws.
5. Install the hose to the air cleaner housing mounting arm. The hose
must be routed correctly.
6. Install the air cleaner outlet duct to the air cleaner housing.
7. Tighten the air cleaner outlet duct screw clamp. 8. Attach the electrical connector to
the air box.
9. Reinstall the side cover.
{WARNING
Operating the engine with the air
cleaner/filter off can cause you or
others to be burned. The air
cleaner not only cleans the air; it
helps to stop flames if the engine
backfires. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.
Notice: If the air cleaner/filter is
off, dirt can easily get into the
engine, which could damage it.
Always have the air cleaner/filter
in place when you are driving.

Black plate (19,1)Cadillac CTS/CTS-V Owner Manual - 2011
Vehicle Care 10-19
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
When you decide it is safe to lift the
hood, here is what you will see:
A. Electric Engine Cooling Fan(s)(Out of View)
B. Coolant Surge Tank and Pressure Cap
{WARNING
An electric engine cooling fan
under the hood can start up even
when the engine is not running
and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.
{WARNING
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not 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.
Notice: Using coolant other than
DEX-COOL
®can cause premature
engine, heater core, or radiator
corrosion. In addition, the engine coolant could require changing
sooner, at 50 000 km
(30,000 miles) or 24 months,
whichever occurs first. Any
repairs would not be covered by
the vehicle warranty. Always use
DEX-COOL
®(silicate-free) coolant
in the vehicle.
Engine Coolant
The cooling system in the vehicle
for all engines and the intercooler is
filled with DEX-COOL
®. This coolant
is designed to remain in the vehicle
for five years or 240 000 km
(150,000 miles), whichever occurs
first.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating
on
page 10‑24.