Six-Cylinder Engine Cooling System Components - Jeep J-10 Series 1982 Technical & Service Manual

Table of Contents

COOLING SYSTEMS 1C-3

VISCOUS DRIVE FAN

(HEAVY DUTY COOLING

SYSTEM ONLY)

Fig. 1C-2 Six-Cylinder Engine Cooling System Components

During operation, the coolant temperature is detected

by the temperature sending unit. The sending unit elec

trical resistance varies as temperature changes, causing

the coolant temperature gauge to indicate accordingly.

The sender responds to temperature changes and,

with high torque engine operation or on hot days, the

coolant will be hotter and the gauge will indicate a

higher engine temperature. Unless the gauge pointer

moves past the high end of the band or coolant loss

occurs, this is normal.

The coolant is a mixture of low mineral content water

and ethylene glycol-based antifreeze. The addition of

antifreeze to water alters several physical character

istics of water that are important to cooling system

performance. The freezing point is lowered, the boiling

point is raised and tendencies for corrosion and foaming

are reduced. The lowered freezing point protects the

engine and cooling system components from damage

Troubleshooting