2018 JEEP WRANGLER UNLIMITED coolant

•The timing and accessory belts must be
changed every 37,500 miles (60,000 km) or
3 years for particularly demanding use (dusty
areas, severe weather conditions, very low or
very high temperatures for extended periods,
city driving, long periods of idling). Under no
circumstances should these intervals be
exceeded.
Once A Month Or Before A Long Trip
• Check engine oil level.
• Check windshield washer fluid level.
• Check tire pressure and look for unusual
wear or damage. Rotate tires at the first
sign of irregular wear, even if it occurs
before the oil indicator system turns on.
• Check the fluid levels of the coolant reser-
voir and brake master cylinder, fill as
needed.
• Check function of all interior and exterior
lights.
• Control and recovery of additive level for
AdBlue Diesel emissions (UREA) (if
equipped).Demanding Vehicle Use
• Restore additive level for AdBlue Diesel
emissions (UREA) (if equipped), when the
lamp is illuminated or the message on the
instrument panel.
CAUTION!
Failure to perform the required mainte-
nance items may result in damage to the
vehicle.
Maintenance Plan — Diesel Engine
Required Maintenance Intervals
Refer to the maintenance plan on the follow-
ing pages for the required maintenance inter-
vals.
At Every Oil Change Interval As Indicated By Oil
Change Indicator System:
•
Change oil and filter
•
Rotate the tires
Rotate at the first sign of irregular wear, even
if it occurs before the oil indicator system
turns on
At Every Oil Change Interval As Indicated By Oil
Change Indicator System:
• Inspect battery and clean and tighten ter-
minals as required
• Inspect brake pads, shoes, rotors, drums,
hoses and park brake
• Inspect engine cooling system protection
and hoses
•
Inspect exhaust system
• Inspect engine air cleaner if using in dusty
or off-road conditions
• Inspect all door latches for presence of
grease, reapply if necessary.
•
Inspect coolant level.
NOTE:
Once you have carried out the last interven-
tion in the table, continue with the scheduled
servicing, maintaining the frequency indi-
cated in the plan by marking each operation
with a dot or dedicated note. Simply restart-
ing the maintenance from the start of the
plan may cause the allowed interval to be
exceeded for some operations.SERVICING AND MAINTENANCE
214

Mileage or time passed (whichever comes first)12,500
25,000
37,500
50,000
62,500
75,000
87,500
100,000
112,500
125,000
137,500
150,000
162,500
175,000
187,500
Or Years: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
220,000
240,000
260,000
280,000
300,000
Flush and replace the engine coolant at 10 years or
150,000 miles (240,000 km) whichever comes first.XX
Replace timing drive belt. (***) X X
(*) The actual interval for changing engine oil
and replacing the engine oil filter depends on
the vehicle usage conditions, and is signaled
by the warning light or message in the instru-
ment cluster. In any case, it must never
exceed two years. If the vehicle is used
mainly for city driving, change the engine oil
and filter every year.
(**) The brake fluid interval is time based
only, mileage intervals do not apply.
(***) The timing and accessory belts must be
changed every 37,500 miles (60,000 km) or
3 years for particularly demanding use (dusty
areas, severe weather conditions, very low orvery high temperatures for extended periods,
city driving, long periods of idling). Under no
circumstances should these intervals be ex-
ceeded.
(°) Consumption of additive AdBlue (UREA)
depends on the condition of use of the ve-
hicle and is indicated by LED and/or message
on the instrument panel.
WARNING!
• You can be badly injured working on or
around a motor vehicle. Do only service
work for which you have the knowledge
and the right equipment. If you have any
doubt about your ability to perform a
WARNING!
service job, take your vehicle to a com-
petent mechanic.
• Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an
accident.
SERVICING AND MAINTENANCE
216

ENGINE COMPARTMENT
2.0L Gasoline Engine
1 — Brake Fluid Reservoir 7 — Battery
2 — Intercooler Coolant Reservoir 8 — Power Distribution Center (Fuses)
3 — Intercooler Coolant Pressure Cap 9 — Washer Fluid Reservoir
4 — Engine Oil Fill 10 — Power Steering Fluid Reservoir
5 — Engine Coolant Reservoir 11 — Engine Oil Dipstick
6 — Engine Coolant Pressure Cap 12 — Engine Air Cleaner
217

3.6L Gasoline Engine
1 — Brake Fluid Reservoir 6 — Power Distribution Center (Fuses)
2 — Engine Oil Dipstick 7 — Washer Fluid Reservoir
3 — Engine Coolant Reservoir 8 — Power Steering Fluid Reservoir
4 — Engine Coolant Pressure Cap 9 — Engine Oil Fill
5 — Battery 10 — Engine Air Cleaner
SERVICING AND MAINTENANCE
218

2.2L Diesel Engine
1 — Brake Fluid Reservoir 7 — Engine Coolant Reservoir Pressure Cap
2 — Intercooler Coolant Reservoir 8 — Battery
3 — Intercooler Reservoir Pressure Cap 9 — Power Steering Fluid Reservoir
4 — Engine Oil Fill 10 — Power Distribution Center (Fuses)
5 — Engine Oil Dipstick 11 — Washer Fluid Reservoir
6 — Engine Coolant Reservoir 12 — Engine Air Cleaner
219

Installing The Rear Wiper
1. Lift the wiper arm off of the glass.
2. Insert the wiper blade pivot pin into the
opening on the end of the wiper arm and
rotate the wiper in to place.
3. Place with wiper on the glass and close
the tail gate.
Cooling System
WARNING!
• You or others can be badly burned by hot
engine coolant (antifreeze) or steam
from your radiator. If you see or hear
steam coming from under the hood, do
not open the hood until the radiator has
had time to cool. Never open a cooling
system pressure cap when the radiator
or coolant bottle is hot.
• Keep hands, tools, clothing, and jewelry
away from the radiator cooling fan when
the hood is raised. The fan starts auto-
matically and may start at any time,
whether the engine is running or not.
WARNING!
• When working near the radiator cooling
fan, turn the ignition to the OFF mode.
The fan is temperature controlled and
can start at any time the ignition is in the
ON mode.
Coolant Checks
Check the engine and, intercooler (if
equipped) coolant (antifreeze) protection ev-
ery 12 months (before the onset of freezing
weather, where applicable). If the engine
and, intercooler (if equipped) is dirty or rusty
in appearance, the system should be drained,
flushed and refilled with fresh OAT coolant
(conforming to MS.90032) by an authorized
dealer. Check the front of the A/C condenser
(if equipped) or radiator for any accumulation
of bugs, leaves, etc. If dirty, clean by gently
spraying water from a garden hose vertically
down the face of the A/C condenser (if
equipped) or the back of the radiator core.
Check the engine and, intercooler (if
equipped) cooling system hoses for brittle
rubber, cracking, tears, cuts, and tightness ofthe connection at the coolant recovery bottle
and radiator. Inspect the entire system for
leaks. DO NOT REMOVE THE COOLANT
PRESSURE CAP WHEN THE COOLING SYS-
TEM IS HOT.
Brake System
In order to assure brake system performance,
all brake system components should be in-
spected periodically. Refer to the “Mainte-
nance Plan” in this section for the proper
maintenance intervals.
WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your
foot resting or riding on the brake pedal
can result in abnormally high brake tem-
peratures, excessive lining wear, and pos-
sible brake damage. You would not have
your full braking capacity in an emergency.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should
be checked whenever the vehicle is serviced,
or immediately if the brake system warning
SERVICING AND MAINTENANCE
224

U.S. Metric
2.0L Gasoline Engine (API SN PLUS certified
SAE 5W-30, FCA Material Standard MS-
13340)5 Quarts 4.73 Liters
3.6L Gasoline Engine (API certified SAE 0W-
20, FCA Material Standard MS-6395)5 Quarts 4.73 Liters
2.2L Diesel Engine (API certified SAE 0W-30 -
FCA Material Standard 9.55535-DS1,
MS.90047 and ACEA C2)5 Quarts 4.73 Liters
Cooling System *
2.0L Gasoline Engine (OAT FCA Material Stan-
dard MS.90032)10.3 Quarts 9.7 Liters
2.0L Gasoline Engine Intercooler (OAT FCA
Material Standard MS.90032)3.2 Quarts 3.0 Liters
3.6L Gasoline Engine (OAT FCA Material Stan-
dard MS.90032)11.2 Quarts 10.6 Liters
2.2L Diesel Engine (OAT FCA Material Stan-
dard MS.90032)10.1 Quarts 9.54 Liters
2.2L Diesel Engine Intercooler (OAT FCA Mate-
rial Standard MS.90032)3.1 Quarts 2.92 Liters
* Includes coolant recovery bottle filled to MAX level.
TECHNICAL SPECIFICATIONS
258

FLUIDS AND LUBRICANTS
Engine
Your vehicle is equipped with an engine oil
that has been thoroughly developed and
tested in order to meet the requirements ofthe Scheduled Servicing Plan. Constant use
of the prescribed lubricants guarantees the
fuel consumption and emission specifica-
tions. Lubricant quality is crucial for engine
operation and duration. If lubricants con-
forming to the specific request are not avail-
able, products that meet the indicated speci-fications can be used to top up, in this case
optimal performance of the engine is not
guaranteed.
Component Fluid, Lubricant, or Genuine Part
Engine Coolant We recommend you use PARAFLUUPFormula OAT (Organic Additive Technology) or
equivalent meeting the requirements of FCA Material Standard MS.90032.
Intercooler – If Equipped We recommend you use PARAFLU
UPFormula OAT (Organic Additive Technology) or
equivalent meeting the requirements of FCA Material Standard MS.90032.
Engine Oil — 2.0L Gasoline Engine We recommend you use API SN PLUS Certified SAE 5W-30 Full Synthetic Engine Oil which
meets the requirements of FCA Material Standard MS-13340. If SN PLUS or equivalent oil
is unavailable then use SAE 0W-30 ACEA C2/API SN Full Synthetic Engine Oil which meets
the requirement of FCA Material Standard 9.55535-GS1, such as SELENIA DIGITEK.
CAUTION!
Failure to use the recommended SN PLUS or equivalent oil can cause engine damage not cov-
ered by the vehicle warranty.
Engine Oil — 3.6L Gasoline Engine We recommend you use, API Certified SAE 0W-20 Engine Oil, meeting the requirements
of FCA Material Standard MS-6395. Refer to your engine oil filler cap for correct SAE
grade.
259