TM 5-3895-369-l4
20. UNUSUAL ENGINE NOISE.
INITIAL SETUP
Tools and Special Tools
Equipment Conditions
Tool kit, general mechanic's: automotive
Engine shut off, (para 2-10[c]).
Torque wrench
Parking brake set, (para 2-13).
Left/right engine doors open (para 2-14).
TEST OPTIONS
KNOWN INFO
Drive belt inspection.
Nothing.
REASON FOR QUESTION
A loose or worn drive belt will
cause water pump impeller to
rotate at a slower speed
reducing coolant flow.
POSSIBLE PROBLEMS
Faulty drive belt.
Faulty fan hub.
Faulty water pump.
Faulty inlet pipe.
Leaking manifold cover gasket.
Faulty turbocharger gasket.
4-102