Brake System; Fluid Level Check — Brake Master Cylinder; Riding the brakes can lead to brake failure and possi-- Page 394

2018 Jeep Wrangler JK Owner Manual

Table of Contents

GETTING TO KNOW YOUR VEHICLE
GETTING TO KNOW YOUR INSTRUMENT PANEL
SAFETY
OCCUPANT RESTRAINT SYSTEMS
STARTING AND OPERATING
SERVICING AND MAINTENANCE
MULTIMEDIA
UCONNECT PHONE — IF EQUIPPED
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Maintain engine coolant (antifreeze) concentration at a

minimum of 50% OAT coolant (conforming to

MS.90032) and distilled water for proper corrosion pro-

tection of your engine which contains aluminum com-

ponents.

Make sure that the coolant expansion bottle overflow

hoses are not kinked or obstructed.

Keep the front of the radiator clean. If your vehicle is

equipped with air conditioning, keep the front of the

condenser clean.

Do not change the thermostat for Summer or Winter

operation. If replacement is ever necessary, install ONLY

the correct type thermostat. Other designs may result in

unsatisfactory engine coolant (antifreeze) performance,

poor gas mileage, and increased emissions.

Brake System

In order to assure brake system performance, all brake

system components should be inspected periodically. Refer

to the “Maintenance Plan” in this section for the proper

maintenance intervals.

WARNING!

Riding the brakes can lead to brake failure and possi-
bly a collision. Driving with your foot resting or riding
on the brake pedal can result in abnormally high brake
temperatures, excessive lining wear, and possible
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 light is on. If necessary, add fluid to

bring level within the designated marks on the side of the

reservoir of the brake master cylinder. Be sure to clean the

top of the master cylinder area before removing cap. With

disc brakes, fluid level can be expected to fall as the brake

pads wear. Brake fluid level should be checked when pads

are replaced. If the brake fluid is abnormally low, check the

system for leaks.
Refer to “Fluids And Lubricants” in “Technical Specifica-

tions” for further information.

392

SERVICING AND MAINTENANCE

Detailed Information for 2018 Jeep Wrangler JK Owner Manual

Lists of information found in 2018 Jeep Wrangler JK Owner Manual - Page 394

  • Maintain engine coolant (antifreeze) concentration at a minimum of 50% OAT coolant (conforming to MS.
  • Make sure that the coolant expansion bottle overflow hoses are not kinked or obstructed.
  • Keep the front of the radiator clean.
  • Do not change the thermostat for Summer or Winter operation.

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