Engine Coolant Checks; Cooling System — Drain, Flush And Refill; Selection Of Coolant- Page 390

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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WARNING!

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Keep hands, tools, clothing, and jewelry away from
the radiator cooling fan when the hood is raised. The
fan starts automatically and may start at any time,
whether the engine is running or not.

When working near the radiator cooling fan, discon-
nect the fan motor lead or 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.

Engine Coolant Checks

Check the engine coolant (antifreeze) protection every 12

months (before the onset of freezing weather, where appli-

cable). If the engine coolant (antifreeze) is dirty or rusty in

appearance, the system should be drained, flushed and

refilled with fresh engine coolant (antifreeze). 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 cooling system hoses for brittle rubber,

cracking, tears, cuts, and tightness of the connection at the

coolant recovery bottle and radiator. Inspect the entire

system for leaks. DO NOT REMOVE THE COOLANT

PRESSURE CAP WHEN THE COOLING SYSTEM IS HOT.

Cooling System — Drain, Flush And Refill

NOTE:

Some vehicles require special tools to add coolant

properly. Failure to fill these systems properly could lead to

severe internal engine damage. If any coolant is needed to

be added to the system please contact an authorized dealer.
If the engine coolant (antifreeze) is dirty or contains visible

sediment, have an authorized dealer clean and flush with

OAT coolant (antifreeze) (conforming to MS.90032).
Refer to the “Maintenance Plan” in this section for the

proper maintenance intervals.

Selection Of Coolant

Refer to “Fluids And Lubricants” in “Technical Specifica-

tions” for further information.

388

SERVICING AND MAINTENANCE

Detailed Information for 2018 Jeep Wrangler JK Owner Manual

Lists of information found in 2018 Jeep Wrangler JK Owner Manual - Page 390

  • Keep hands, tools, clothing, and jewelry away from the radiator cooling fan when the hood is raised.
  • When working near the radiator cooling fan, discon- nect the fan motor lead or turn the ignition to the OFF mode.

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