ACCESSORY DRIVE BELT DIAGNOSIS
CONDITION POSSIBLE CAUSE CORRECTION
INSUFFICIENT ACCESSORY
OUTPUT DUE TO BELT SLIPPAGE
1. Belt too loose. 1. Adjust belt tension.
2. Belt excessively glazed or worn. 2. Replace and tighten as specified.
BELT SQUEAL WHEN
ACCELERATING ENGINE
1. Belts too loose. 1. Adjust belt tension.
2. Belts glazed. 2. Replace belts.
BELT CHIRP AT IDLE 1. Belts too loose. 1. Adjust belt tension.
2. Foreign material imbedded in
belt.
2. Replace belt.
3. Non-uniform belt. 3. Replace belt.
4. Misaligned pulley(s). 4. Align accessories.
5. Non-uniform groove or eccentric
pulley.
5. Replace pulley(s).
BELT ROLLED OVER IN GROOVE
OR BELT JUMPS OFF
1. Broken cord in belt. 1. Replace belt.
2. Belt too loose, or too tight. 2. Adjust belt tension.
3. Misaligned pulleys. 3. Align accessories.
4. Non-uniform grooves or eccentric
pulley.
4. Replace pulley(s).
ENGINE BLOCK HEATER
If unit does not operate, trouble can be in either
the power cord or the heater element. Test power
cord for continuity with a 110-volt voltmeter or 110-
volt test light; test heater element continuity with an
ohmmeter or 12-volt test light.
The power cord must be secured in its retainer
clips, and not positioned so it could contact linkages
or exhaust manifolds and become damaged.
SERVICE PROCEDURES
COOLANT SERVICE
Refer to LUBRICATION AND MAINTENANCE for
engine coolant recommended service schedule.
COOLANT LEVEL CHECK
Do not remove coolant bottle pressure cap for rou-
tine coolant level inspections.
The coolant bottle provides a quick visual method
for determining the coolant level without removing
the pressure cap. With the engine cold, the level of
the coolant in the coolant bottle (Fig. 19) should be
between the MIN and MAX lines on the bottle.
COOLANT—ADDING ADDITIONAL
When additional coolant is needed, it should be
added to the coolant pressure bottle. Use only 50/50
mix of Mopart Antifreeze/Coolant, 5 Year/100,000
Mile Formula (orange in color), or the equivalent and
distilled water. This coolant must not be mixed with
Fig. 19 Coolant Bottle Cold Fill Level
1 – COOLANT PRESSURE BOTTLE
7 - 18 COOLING SYSTEM LH
DIAGNOSIS AND TESTING (Continued)
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