Jeep Grand Cherokee SRT (2018 year). Instruction — part 26

WARNING!

You can be badly injured working on or around a
motor vehicle. Only do service work for which you
have the knowledge and the proper equipment. If you
have any doubt about your ability to perform a service
job, take your vehicle to a competent mechanic.

Engine Oil

Change Engine Oil

The oil change indicator system will remind you that it is
time to take your vehicle in for scheduled maintenance.
Refer to “Scheduled Servicing” for further information.

NOTE:

Under no circumstances should oil change inter-

vals exceed 6,000 miles (10,000 km) or six months, which-
ever occurs first.

Engine Oil Selection

For best performance and maximum protection under all
types of operating conditions, the manufacturer only rec-
ommends full synthetic engine oils that meet the American
Petroleum Institute (API) categories of SN.

The manufacturer recommends the use of Pennzoil Ultra
0W-40 engine or equivalent Mopar oil meeting the FCA
Material Standard MS-12633 for use in all operating tem-
peratures.

The engine oil filler cap also shows the recommended
engine oil viscosity for your engine. For information on
engine oil filler cap location, refer to “Engine Compart-
ment” in this section for further information.

CAUTION!

Do not use chemical flushes in your engine oil as the
chemicals can damage your engine. Such damage is not
covered by the New Vehicle Limited Warranty.

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American Petroleum Institute (API) Engine Oil
Identification Symbol

This symbol means that the oil has
been certified by the American Pe-
troleum Institute (API). The manu-
facturer only recommends API Cer-
tified engine oils.

This symbol certifies 0W-20, 5W-20,
0W-30, 5W-30 and 10W-30 engine
oils.

CAUTION!

Do not use chemical flushes in your engine oil as the
chemicals can damage your engine. Such damage is not
covered by the New Vehicle Limited Warranty.

Engine Oil Viscosity

Use Pennzoil Ultra Platinum 0W-40 engine or equivalent
Mopar oil meeting the FCA Material Standard MS-12633
for use in all operating temperatures.

The engine oil filler cap also shows the recommended
engine oil viscosity for your engine. For information on

engine oil filler cap location, refer to “Engine Compart-
ment” in this section for further information.

Synthetic Engine Oils

You may use synthetic engine oils provided the recom-
mended oil quality requirements are met, and the recom-
mended maintenance intervals for oil and filter changes are
followed.

Synthetic engine oils which do not have both the engine oil
certification mark and the correct SAE viscosity grade
number should not be used.

Materials Added To Engine Oil

The manufacturer strongly recommends against the addi-
tion of any additives (other than leak detection dyes) to the
engine oil. Engine oil is an engineered product and its
performance may be impaired by supplemental additives.

Disposing Of Used Engine Oil And Oil Filters

Care should be taken in disposing of used engine oil and
oil filters from your vehicle. Used oil and oil filters,
indiscriminately discarded, can present a problem to the
environment. Contact your authorized dealer, service sta-
tion or governmental agency for advice on how and where
used oil and oil filters can be safely discarded in your area.

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Engine Oil Filter

The engine oil filter should be replaced with a new filter at
every engine oil change.

Engine Oil Filter Selection

This manufacturer’s engines have a full-flow type dispos-
able oil filter. Use a filter of this type for replacement. The
quality of replacement filters varies considerably. Only
high quality filters should be used to assure most efficient
service. Mopar engine oil filters are high quality oil filters
and are recommended.

Engine Air Cleaner Filter

Refer to the “Maintenance Plan” in this section for the
proper maintenance intervals.

WARNING!

The air induction system (air cleaner, hoses, etc.) can
provide a measure of protection in the case of engine
backfire. Do not remove the air induction system (air
cleaner, hoses, etc.) unless such removal is necessary
for repair or maintenance. Make sure that no one is

(Continued)

WARNING! (Continued)

near the engine compartment before starting the ve-
hicle with the air induction system (air cleaner, hoses,
etc.) removed. Failure to do so can result in serious
personal injury.

Engine Air Cleaner Filter Selection

The quality of replacement engine air cleaner filters varies
considerably. Only high quality filters should be used to
assure most efficient service. Mopar engine air cleaner
filters are a high quality filter and are recommended.

Gasoline Engine Air Cleaner Filter Inspection and
Replacement

Inspect engine air cleaner filter for dirt and or debris, if you
find evidence of either dirt or debris you should change
your air cleaner filter.

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Engine Air Cleaner Filter Removal

1. Release the spring clips from the air cleaner cover.

2. Lift the air cleaner cover to access the air cleaner filter.

Air Cleaner Filter Cover

1 — Clean Air Hose Clamp
2 — Air Hose
3 — Spring Clips

Open Air Cleaner Filter Assembly

1 — Air Cleaner Cover
2 — Air Cleaner Filter

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3. Remove the air cleaner filter element from the housing

assembly.

Engine Air Cleaner Filter Installation

NOTE:

Inspect and clean the housing if dirt or debris is

present before replacing the air filter element.

1. Install the air cleaner filter element into the housing

assembly with the air cleaner filter inspection surface
facing downward.

2. Install the air cleaner cover onto the housing assembly

locating tabs.

3. Latch the spring clips and lock the air cleaner cover to

the housing assembly.

Accessory Drive Belt Inspection

WARNING!

• Do not attempt to inspect an accessory drive belt

with vehicle running.

• When working near the radiator cooling fan, discon-

nect the fan motor lead. The fan is temperature
controlled and can start at any time regardless of
ignition mode. You could be injured by the moving
fan blades.

• You can be badly injured working on or around a

motor vehicle. Only do service work for which you
have the knowledge and the proper equipment. If
you have any doubt about your ability to perform a
service job, take your vehicle to a competent me-
chanic.

Air Cleaner Filter

1 — Air Cleaner Filter
2 — Air Cleaner Filter Inspection Surface

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When inspecting accessory drive belts, small cracks that
run across ribbed surface of belt from rib to rib, are
considered normal. These are not a reason to replace belt.
However, cracks running along a rib (not across) are not
normal. Any belt with cracks running along a rib must be
replaced. Also have the belt replaced if it has excessive
wear, frayed cords or severe glazing.

Conditions that would require replacement:
• Rib chunking (one or more ribs has separated from belt

body)

• Rib or belt wear

• Longitudinal belt cracking (cracks between two ribs)
• Belt slips
• “Groove jumping⬙ (belt does not maintain correct posi-

tion on pulley)

• Belt broken (note: identify and correct problem before

new belt is installed)

• Noise (objectionable squeal, squeak, or rumble is heard

or felt while drive belt is in operation)

Some conditions can be caused by a faulty component such
as a belt pulley. Belt pulleys should be carefully inspected
for damage and proper alignment.

Belt replacement on some models requires the use of
special tools, we recommend having your vehicle serviced
at an authorized dealer.

Air Conditioner Maintenance

For best possible performance, your air conditioner should
be checked and serviced by an authorized dealer at the
start of each warm season. This service should include
cleaning of the condenser fins and a performance test.
Drive belt tension should also be checked at this time.

Accessory Belt (Serpentine Belt)

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WARNING!

• Use only refrigerants and compressor lubricants ap-

proved by the manufacturer for your air conditioning
system. Some unapproved refrigerants are flam-
mable and can explode, injuring you. Other unap-
proved refrigerants or lubricants can cause the sys-
tem to fail, requiring costly repairs. Refer to
Warranty Information Book, for further warranty
information.

• The air conditioning system contains refrigerant un-

der high pressure. To avoid risk of personal injury or
damage to the system, adding refrigerant or any
repair requiring lines to be disconnected should be
done by an experienced technician.

CAUTION!

Do not use chemical flushes in your air conditioning
system as the chemicals can damage your air condition-
ing components. Such damage is not covered by the
New Vehicle Limited Warranty.

Refrigerant Recovery And Recycling R134a — If
Equipped

R-134a Air Conditioning Refrigerant is a hydrofluoro-
carbon (HFC) that is an ozone-friendly substance. The
manufacturer recommends that air conditioning service be
performed by an authorized dealer or other service facili-
ties using recovery and recycling equipment.

NOTE:

Use only manufacturer approved A/C system PAG

compressor oil and refrigerants.

Refrigerant Recovery And Recycling — R–1234yf

R–1234yf Air Conditioning Refrigerant is a hydrofluo-
roolefin (HFO) that is endorsed by the Environmental
Protection Agency and is an ozone-friendly substance with
a low global-warming potential. The manufacturer recom-
mends that air conditioning service be performed by an
authorized dealer using recovery and recycling equipment.

NOTE:

Use only manufacturer approved A/C system

PAG compressor oil, and refrigerants.

Air Conditioning Filter Replacement (A/C Air Filter)

Refer to “Scheduled Servicing” in this section for the
proper maintenance intervals.

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WARNING!

Do not remove the cabin air filter while the vehicle is
running, or while the ignition is in the ACC or ON/
RUN mode. With the cabin air filter removed and the
blower operating, the blower can contact hands and
may propel dirt and debris into your eyes, resulting in
personal injury.

The A/C air filter is located in the fresh air inlet behind the
glove compartment. Perform the following procedure to
replace the filter:

1. Open the glove compartment and remove all contents.

2. There are glove compartment travel stops on both sides

of the glove compartment door, partially close the glove
compartment door and push inward to release the glove
compartment travel stop on one side and repeat this
procedure for the opposite side.

3. Pull the right hand side of the glove compartment door

toward the rear of the vehicle to disengage the glove
compartment door from its hinges.

Glove Compartment

1 — Glove Compartment Travel Stops
2 — Glove Compartment Tension Tether
3 — Glove Compartment Door

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NOTE:

When disengaging the glove compartment door

from its hinges, there will be some resistance.

4. With the glove compartment door loose, remove the

glove compartment tension tether and tether clip by
sliding the clip toward the face of the glove compart-
ment door and lifting the clip out of glove compartment
door.

5. Remove the filter cover by disengaging the retaining tab

and mid way snap that secures the filter cover to the
HVAC housing. Disengage the mid way snap by pulling
the door outward. Unhinge the filter cover on the right
side to fully remove the cover.

6. Remove the A/C air filter by pulling it straight out of

the housing.

Right Side Of Glove Compartment

1 — Glove Compartment Tension Tether
2 — Glove Compartment Door

A/C Air Filter Cover

1 — Retaining Tab
2 — Mid Way Snap
3 — Filter Cover Hinge

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7. Install the A/C air filter with the arrow on the filter

pointing toward the floor. When installing the filter
cover, make sure the retaining tabs fully engage the
cover.

CAUTION!

The cabin air filter is identified with an arrow to
indicate airflow direction through the filter. Failure to
properly install the filter will result in the need to
replace it more often.

8. Reinstall the glove compartment door on the glove

compartment door hinge and reattach the glove com-
partment tension tether by inserting the tether clip in the
glove compartment and sliding the clip away from the
face of the glove compartment door.

9. Push the door to the near closed position to reengage the

glove compartment travel stops.

NOTE:

Ensure the glove compartment door hinges and

glove compartment travel stops are fully engaged.

Body Lubrication

Locks and all body pivot points, including such items as
seat tracks, door hinge pivot points and rollers, liftgate,
tailgate, decklid, sliding doors and hood hinges, should be
lubricated periodically with a lithium based grease, such as
Mopar Spray White Lube to assure quiet, easy operation
and to protect against rust and wear. Prior to the applica-
tion of any lubricant, the parts concerned should be wiped
clean to remove dust and grit; after lubricating excess oil
and grease should be removed. Particular attention should
also be given to hood latching components to ensure
proper function. When performing other underhood ser-
vices, the hood latch, release mechanism and safety catch
should be cleaned and lubricated.

The external lock cylinders should be lubricated twice a
year, preferably in the Fall and Spring. Apply a small
amount of a high quality lubricant, such as Mopar Lock
Cylinder Lubricant directly into the lock cylinder.

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Windshield Wiper Blades

Clean the rubber edges of the wiper blades and the
windshield periodically with a sponge or soft cloth and a
mild nonabrasive cleaner. This will remove accumulations
of salt or road film.

Operation of the wipers on dry glass for long periods may
cause deterioration of the wiper blades. Always use washer
fluid when using the wipers to remove salt or dirt from a
dry windshield.

Avoid using the wiper blades to remove frost or ice from
the windshield. Keep the blade rubber out of contact with
petroleum products such as engine oil, gasoline, etc.

NOTE:

Life expectancy of wiper blades varies depending

on geographical area and frequency of use. Poor perfor-
mance of blades may be present with chattering, marks,
water lines or wet spots. If any of these conditions are
present, clean the wiper blades or replace as necessary.

The wiper blades and wiper arms should be inspected
periodically, not just when wiper performance problems
are experienced. This inspection should include the follow-
ing points:
• Wear Or Uneven Edges
• Foreign Material
• Hardening Or Cracking
• Deformation Or Fatigue
If a wiper blade or wiper arm is damaged, replace the
affected wiper arm or blade with a new unit. Do not
attempt to repair a wiper arm or blade that is damaged.

Front Wiper Blade Removal/Installation

CAUTION!

Do not allow the wiper arm to spring back against the
glass without the wiper blade in place or the glass may
be damaged.

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1. Lift the wiper arm to raise the wiper blade off of the

glass, until the wiper arm is in the full up position.

2. To disengage the wiper blade from the wiper arm, flip

up the release tab on the wiper blade and while holding
the wiper arm with one hand, slide the wiper blade
down towards the base of the wiper arm.

Wiper Blade With Release Tab In Locked Position

1 — Wiper
2 — Release Tab
3 — Wiper Arm

Wiper Blade With Release Tab In Unlocked Position

1 — Wiper Blade
2 — Release Tab
3 — Wiper Arm

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3. With the wiper blade disengaged, remove the wiper

blade from the wiper arm by holding the wiper arm
with one hand and separating the wiper blade from the
wiper arm with the other hand (move the wiper blade
toward the right side of the vehicle to separate the wiper
blade from the wiper arm).

4. Gently lower the wiper arm onto the glass.

Installing The Front Wipers

1. Lift the wiper arm off of the glass, until the wiper arm is

in the full up position.

2. Position the wiper blade near the hook on the tip of the

wiper arm with the wiper release tab open and the blade
side of the wiper facing up and away from the wind-
shield.

3. Insert the hook on the tip of the arm through the

opening in the wiper blade under the release tab.

4. Slide the wiper blade up into the hook on the wiper arm

and rotate the wiper blade until it is flush against the
wiper arm. Fold down the latch release tab and snap it
into its locked position. Latch engagement will be
accompanied by an audible click.

5. Gently lower the wiper blade onto the glass.

Wiper Blade Removed From Wiper Arm

1 — Wiper Blade
2 — Wiper Arm
3 — Release Tab

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Rear Wiper Blade Removal/Installation

1. Lift the rear wiper arm pivot cap away from the glass to

allow the rear wiper blade to be raised off of the glass.

NOTE:

The rear wiper arm cannot be fully raised off the

glass unless the wiper arm pivot cap is unsnapped first.
Attempting to fully raise the rear wiper arm without
unsnapping the wiper arm pivot cap may damage the
vehicle.

Wiper Pivot Cap In Unlocked Position

1 — Wiper Arm Pivot Cap
2 — Wiper Arm

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2. Lift the rear wiper arm fully off the glass.

3. To remove the wiper blade from the wiper arm, grasp

the bottom end of the wiper blade nearest to wiper arm
with your right hand. With your left hand hold the
wiper arm as you pull the wiper blade away from the
wiper arm past its stop far enough to unsnap the wiper
blade pivot pin from the receptacle on the end of the
wiper arm.

NOTE:

Resistance will be accompanied by an audible

snap.

4. Still grasping the bottom end of the wiper blade, move

the wiper blade upward and away from the wiper arm
to disengage.

5. Gently lower the tip of the wiper arm onto the glass.

Wiper Blade In Folded Out Position

1 — Wiper Arm Pivot Cap
2 — Wiper Arm
3 — Wiper Blade

Wiper Blade Removed From Wiper Arm

1 — Wiper Blade
2 — Wiper Blade Pivot Pin
3 — Wiper Arm
4 — Wiper Arm Receptacle

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Installing The Rear Wiper

1. Lift the rear wiper arm pivot cap away from the glass to

allow the rear wiper blade to be raised off of the glass.

NOTE:

The rear wiper arm cannot be fully raised off the

glass unless the wiper arm pivot cap is unsnapped first.
Attempting to fully raise the rear wiper arm without
unsnapping the wiper arm pivot cap may damage the
vehicle.

2. Lift the rear wiper arm fully off the glass.

3. Insert the wiper blade pivot pin into the opening on the

end of the wiper arm. Grab the bottom end of the wiper
arm with one hand, and press the wiper blade flush
with the wiper arm until it snaps into place.

4. Lower the wiper blade onto the glass and snap the

wiper arm pivot cap back into place.

Exhaust System

The best protection against carbon monoxide entry into the
vehicle body is a properly maintained engine exhaust
system.

If you notice a change in the sound of the exhaust system;
or if the exhaust fumes can be detected inside the vehicle;
or when the underside or rear of the vehicle is damaged;

have an authorized technician inspect the complete ex-
haust system and adjacent body areas for broken, dam-
aged, deteriorated, or mispositioned parts. Open seams or
loose connections could permit exhaust fumes to seep into
the passenger compartment. In addition, have the exhaust
system inspected each time the vehicle is raised for lubri-
cation or oil change. Replace as required.

WARNING!

• Exhaust gases can injure or kill. They contain carbon

monoxide (CO), which is colorless and odorless.
Breathing it can make you unconscious and can
eventually poison you. To avoid breathing CO, refer
to “Safety Tips” in “Safety” for further information.

• A hot exhaust system can start a fire if you park over

materials that can burn. Such materials might be
grass or leaves coming into contact with your exhaust
system. Do not park or operate your vehicle in areas
where your exhaust system can contact anything that
can burn.

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