engine CADILLAC DTS 2010 1.G Manual Online

How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter, remove the filter from thevehicle and lightly shake the filter to release loose dustand dirt. If the filter remains caked with dirt, a new filteris required.
To inspect or replace the filter:
1. Remove the two screws on the top of the engine aircleaner/filter cover.
2. Lift up the outboard side of the cover at an anglewhile pulling toward you. This is necessary due tothe two hinges located on the inboard side ofthe cover.
3. Remove the engine air cleaner/filter and any loosedebris that may be found in the air cleaner base.
4. Inspect or replace the air filter element.
To reinstall the cover:
1. Align the two hinges located on the inboard side ofthe cover.
2. Push the cover slightly down and towards theengine to engage the tabs in the hinges andalign the two screws.
3. Tighten the two screws on the top of the engine aircleaner/filter cover.
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{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. If it is not there and
the engine backfires, you could be burned. Do not
drive with it off, and be careful working on the
engine with the air cleaner/filter off.
Notice:If the air cleaner/filter is off, a backfire cancause a damaging engine fire. And, dirt caneasily get into the engine, which will damage it.Always have the air cleaner/filter in place when youare driving.
Automatic Transmission Fluid
When to Check and Change Automatic
Transmission Fluid
A good time to check the automatic transmission fluidlevel is when the engine oil is changed.
Change the fluid and filter at the intervals listed inScheduled Maintenance on page 7-3, and be sure touse the transmission fluid listed inRecommended Fluidsand Lubricants on page 7-8.
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How to Check Automatic
Transmission Fluid
Because this operation can be a little difficult, you maychoose to have this done at the dealer/retailer servicedepartment.
If you do it yourself, be sure to follow all the instructionshere or you could get a false reading on the dipstick.
Notice:Too much or too little fluid can damageyour transmission. Too much can mean that someof the fluid could come out and fall on hot engineparts or exhaust system parts, starting a fire.Too little fluid could cause the transmission tooverheat. Be sure to get an accurate reading if youcheck your transmission fluid.
Wait at least 30 minutes before checking thetransmission fluid level if you have been driving:
•When outside temperatures are above 32°C (90°F).
•At high speed for quite a while.
•In heavy traffic — especially in hot weather.
•While pulling a trailer.
To get the right reading, the fluid should be atnormal operating temperature, which is 82°C to 93°C(180°F to 200°F).
Get the vehicle warmed up by driving about 24 km(15 miles) when outside temperatures are above10°C (50°F). If it is colder than 10°C (50°F), you mayhave to drive longer.
Checking the Fluid Level
Prepare the vehicle as follows:
1. Park the vehicle on a level place. Keep the enginerunning.
2. With the parking brake applied, place the shift leverin P (Park).
3. With your foot on the brake pedal, move the shiftlever through each gear range, pausing for aboutthree seconds in each range. Then, positionthe shift lever in P (Park).
4. Let the engine run at idle for three to five minutes.
Then, without shutting off the engine, follow these steps:
1. Locate the transmission fluid cap which is locatednext to the radiator hose and below the engine aircleaner/filter assembly on the driver side of thevehicle. The cap is marked TRANS FLUID.SeeEngine Compartment Overview on page 6-12for more information on location.
2. After removing the engine air cleaner/filter assemblyto reach the transmission fluid cap, turn the capcounterclockwise to remove. Pull out the dipstickand wipe it with a clean rag or paper towel.
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3. Push it back in all the way, wait three seconds, andthen pull it back out again.
4. Check both sides of the dipstick and readthe lower level. The fluid level must be in thecross-hatched area.
5. If the fluid level is in the acceptable range, push thedipstick back in all the way and turn the handleclockwise.
6. Reinstall the engine air cleaner/filter assembly.
How to Add Automatic Transmission
Fluid
Refer to the Maintenance Schedule to determine whatkind of transmission fluid to use. SeeRecommendedFluids and Lubricants on page 7-8.
If the fluid level is low, add only enough of the properfluid to bring the level into the cross-hatched area onthe dipstick.
1. Pull out the dipstick.
2. Using a long-neck funnel, add enough fluid at thedipstick hole to bring it to the proper level.
It does not take much fluid, generally less thanone pint (0.5 L). Do not overfill.
Notice:Use of the incorrect automatic transmissionfluid may damage the vehicle, and the damagesmay not be covered by the vehicle’s warranty.Always use the automatic transmission fluid listedinRecommended Fluids and Lubricants on page 7-8.
3. After adding fluid, recheck the fluid level asdescribed under “How to Check AutomaticTransmission Fluid,” earlier in this section.
4. When the correct fluid level is obtained, pushthe dipstick back in all the way and turn thehandle clockwise.
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Cooling System
The cooling system allows the engine to maintain the correct working temperature.
A. Coolant Surge Tank with Pressure CapB. Electric Engine Cooling Fans
4.6L L37 Engine shown, 4.6L LD8 Engine similar
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{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®cancause premature engine, heater core, or radiatorcorrosion. In addition, the engine coolant couldrequire changing sooner, at 50 000 km (30,000 miles)or 24 months, whichever occurs first. Any repairswould not be covered by the vehicle warranty.Always use DEX-COOL®(silicate-free) coolant inthe vehicle.
Engine Coolant
The cooling system in the vehicle is filled withDEX-COOL®engine coolant. This coolant is designedto remain in the vehicle for five years or 150,000 miles(240 000 km), whichever occurs first.
The following explains the cooling system and how tocheck and add coolant when it is low. If there is aproblem with engine overheating, seeEngineOverheating on page 6-27.
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What to Use
{WARNING:
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 fire 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 andDEX-COOL®coolant. If using this mixture, nothing elseneeds 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, theengine could overheat and be badly damaged.The repair cost would not be covered by the vehiclewarranty. Too much water in the mixture canfreeze and crack the engine, radiator, heater core,and other parts.
Notice:If extra inhibitors and/or additives are usedin the vehicle’s cooling system, the vehicle couldbe damaged. Use only the proper mixture ofthe engine coolant listed in this manual for thecooling system. SeeRecommended Fluids andLubricants on page 7-8for more information.
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Checking Coolant
The vehicle must be on a level surface when checkingthe coolant level.
Check to see if coolant is visible in the coolant recoverytank. If the coolant inside the coolant recovery tank isboiling, do not do anything else until it cools down.If coolant is visible but the coolant level is not ator above the FULL COLD mark, add a 50/50 mixture ofclean, drinkable water and DEX-COOL®coolant atthe coolant recovery tank, but be sure the coolingsystem is cool before this is done. SeeEngine Coolanton page 6-23for more information.
How to Add Coolant to the Surge Tank
{WARNING:
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 specific coolant fillprocedure. Failure to follow this procedure couldcause the engine to overheat and be severelydamaged.
{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.
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4. With the coolant surge tank cap off, start the engineand let it run until you can feel the upper radiatorhose getting hot. Watch out for the enginecooling fans.
By this time, the coolant level inside the coolantsurge tank may be lower. If the level is lower, addmore of the proper mixture to the coolant surge tankuntil the level reaches the FULL COLD mark onthe side of the coolant surge tank.
5. Replace the cap. Be sure the cap is hand-tight andfully seated.
Notice:If the pressure cap is not tightly installed,coolant loss and possible engine damage mayoccur. Be sure the cap is properly and tightlysecured.
If coolant is needed, add the proper DEX-COOL®
coolant mixture at the coolant recovery tank.
Engine Overheating
The vehicle has several indicators to warn of engineoverheating.
There is an engine temperature warning light and/orgage on the instrument panel cluster. SeeEngineCoolant Temperature Warning Light on page 4-55andEngine Coolant Temperature Gage on page 4-56.
The vehicle may also display a ENGINE OVERHEATEDIDLE ENGINE message or an ENGINE OVERHEATEDSTOP ENGINE message displayed in the DriverInformation Center (DIC). SeeDIC Warnings andMessages on page 4-67for more information. You willalso hear a chime.
4.6L L37 Engine shown, 4.6L LD8 Engine similar
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You may decide not to lift the hood when this warningappears, but instead get service help right away.SeeRoadside Service on page 8-7.
If you do decide to lift the hood, make sure the vehicleis parked on a level surface.
Then check to see if the engine cooling fans arerunning. If the engine is overheating, both fans shouldbe running. If they are not, do not continue to runthe engine and have the vehicle serviced.
Notice:Engine damage from running the enginewithout coolant is not covered by the warranty.
Notice:If the engine catches fire while driving withno coolant, the vehicle can be badly damaged.The costly repairs would not be covered bythe vehicle warranty. SeeOverheated EngineProtection Operating Mode on page 6-29forinformation on driving to a safe place in anemergency.
If Steam Is Coming From The Engine
Compartment
{WARNING:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it. Turn it off and get everyone away from the
vehicle until it cools down. Wait until there is no sign
of steam or coolant before you open the hood.
If you keep driving when the vehicles engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop the engine if it
overheats, and get out of the vehicle until the
engine is cool.
SeeOverheated Engine Protection Operating Mode
on page 6-29for information on driving to a safe
place in an emergency.
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