2009 CADILLAC CTS engine

Engine Cover
Engine Cover (CTS)
To remove:
1. Remove the oil ll cap (A).
2. Raise the right front corner of engine cover (B) to
release from the ball stud.
3. Pull the engine cover (B) forward to slide the rear
tabs (C) out from under the retainers.
4. Lift and remove the engine cover.
5. Reverse Steps 1 through 4 to reinstall engine
cover.
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Engine Cover (CTS-V)To remove: The engine cover consists of two pieces.
Only the larger piece needs to be removed to access the
engine oil and power steering ll caps.
1. Raise the front of engine cover (A) to release from
the ball studs (B).
2. Pull the engine cover forward until clear of the
smaller piece.
3. Lift and remove the engine cover.
4. Reverse Steps 1 through 3 to reinstall engine
cover.
5-24

Engine Air Cleaner/Filter
The engine air cleaner/lter is in the engine
compartment on the driver side of the vehicle, near
the front. SeeEngine Compartment Overview on
page 5-14for more information on location.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/lter at the MaintenanceII
intervals and replace it at the rst oil change after each
50,000 mile (80 000 km) interval. SeeScheduled
Maintenance on page 6-4for more information. If you
are driving in dusty/dirty conditions, inspect the lter
at each engine oil change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/lter, remove the lter
from the vehicle and lightly shake the lter to release
loose dust and dirt. If the lter remains caked with dirt,
a new lter is required.To inspect or replace the engine air cleaner/lter:
1. Turn the ignition off.
2. Remove the side cover by pulling up on the front of
the cover.
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How to Reinstall Engine Air
Cleaner/Filter
1. Install the air cleaner into the air cleaner housing.
The outer air cleaner lter seal must be tted
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.
{CAUTION:
Operating the engine with the air cleaner/lter off
can cause you or others to be burned. The air
cleaner not only cleans the air; it helps to stop
ames if the engine backres. If it is not there and
the engine backres, you could be burned. Do not
drive with it off, and be careful working on the
engine with the air cleaner/lter off.
Notice:If the air cleaner/lter is off, a backre can
cause a damaging engine re. And, dirt can easily get
into the engine, which will damage it. Always have
the air cleaner/lter in place when you are driving.
5-28

Hydraulic Clutch
It is not necessary to regularly check clutch uid unless
you suspect there is a leak in the system. Adding
uid will not correct a leak. A uid loss in this system
could indicate a problem. Have the system inspected
and repaired.
When to Check and What to Use
The hydraulic clutch uid
reservoir cap has this
symbol on it. SeeEngine
Compartment Overview
on page 5-14for reservoir
location.Refer to the Maintenance Schedule for the proper
uid to use. SeeRecommended Fluids and Lubricants
on page 6-14. The uid requires changing every
two years. SeeAdditional Required Services on
page 6-6.
How to Check and Add Fluid
Visually check the clutch uid reservoir to make sure
the uid level is at the MIN (Minimum) line on the side
of the reservoir. The hydraulic clutch uid system should
be kept closed and sealed. Do not remove the cap to
check the uid level or to top-off the uid level. Remove
the cap only when necessary to add the proper uid
until the level reaches the MIN line.
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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{CAUTION:
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.
{CAUTION:
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 re, and you could be burned.
Get any leak xed 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 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by the vehicle warranty.
Always use DEX-COOL
®(silicate-free) coolant in
the vehicle.
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Engine Coolant
The cooling system in the vehicle for all engines and
the intercooler is lled with DEX-COOL®. This coolant is
designed to remain in the vehicle for ve years or
150,000 miles (240 000 km), whichever occurs rst.
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, seeEngine
Overheating on page 5-37.
What to Use
{CAUTION:
Adding only plain water to the cooling system can
be dangerous. Plain water, or some other liquid
such as alcohol, can boil before the proper coolant
mixture will. The vehicle’s coolant warning system
is set for the proper coolant mixture. With plain
water or the wrong mixture, the engine could get
too hot but you would not get the overheat
warning. The engine could catch re and you or
others could be burned. Use a 50/50 mixture of
clean, drinkable water and DEX-COOL
®coolant.Use a 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant. If using this mixture, nothing else
needs to be added. This mixture:
Gives freezing protection down to−34°F (−37°C),
outside temperature.
Gives boiling protection up to 265°F (129°C),
engine temperature.
Protects against rust and corrosion.
Will not damage aluminum parts.
Helps keep the proper engine temperature.
Notice:If an improper coolant mixture is used, the
engine could overheat and be badly damaged. The
repair cost would not be covered by the vehicle
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core, and
other parts.
Notice:If extra inhibitors and/or additives are used
in the vehicle’s cooling system, the vehicle could
be damaged. Use only the proper mixture of
the engine coolant listed in this manual for the
cooling system. SeeRecommended Fluids and
Lubricants on page 6-14for more information.
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Checking Coolant (CTS)
The vehicle must be on a level surface when checking
the coolant level.
The engine coolant reservoir is located in the engine
compartment on the driver side of the vehicle. See
Engine Compartment Overview on page 5-14.
Check to see if coolant is visible in the surge tank.
If the coolant inside the surge tank is boiling, do not do
anything else until it cools down. If coolant is visible
but the coolant level is not at or above the FULL COLD
mark, add a 50/50 mixture of clean, drinkable water
and DEX-COOL
®coolant at the coolant surge tank,
but be sure the cooling system is cool before this
is done. SeeEngine Coolant on page 5-32for more
information.
If the engine is warm or hot, the coolant level should be
at or above the FROID/FULL COLD line on the side
of the coolant surge tank. If the engine is cold, the
coolant level should be near the FROID/FULL COLD
line on the side of the coolant surge tank. If it is
not, there could be a leak in the cooling system.
How to Add Coolant to the Surge Tank
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot enough.
Do not spill coolant on a hot engine.
Notice:This vehicle has a specic coolant ll
procedure. Failure to follow this procedure could
cause the engine to overheat and be severely
damaged.
{CAUTION:
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.
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