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then at the start of every winter season. This will provide the
fullest protection against rust.
High-quality ethylene glycol antifreeze coolant should be
used in the system the year-around.
WARNING:
Do not use any type salt base antifreeze.
Fill with antifreeze coolant and water in 50/50 proportions to
provide -34
°
F freezing protection. (Consult your Jeep dealer
for recommendations if greater protection is required.)
The 50/50 mixture should be maintained throughout the year
to provide good corrosion inhibition as well as anti-boil pro
tection so essential during summer.
Thermostat
The operating temperature of the engine cooling system is
governed by a pre-set thermostat which normally does not
require replacement. However, if you suspect that the ther
mostat is malfunctioning (poor heater performance or engine
over-heating are clues), consult your Jeep dealer for diag
nosis and possible replacement.
Air Conditioning Check
You can occasionally check the operation of your air condi
tioning system by observing the sight glass, located in the
engine compartment near the radiator, with the following
steps:
1. Clean the sight glass and observe for bubbles with en
gine running at fast idle (about 1,500 rpm) and with air
Sight Glass
Location
CJ Models
Summary of Contents for Cherokee 1977
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