Chart 24-Engine Noise

DIAGNOSTIC CHART 24-ENGINE NOISE

System & Component(s)	Reference
SQUEAL, CLICK, CHIRP Oil Level Low Valve Train Drive Belts (loose, worn) Drive Belt Components EEC Solenoids	Perform a visual and audible inspection. Check engine mechanical condition.
RUMBLE, GRIND Belt Driven Components	Perform a visual and audible Inspection
RATTLE Loose Components	Perform a visual and audible inspection.
HISS Thermactor System Leaks Vacuum Distribution System Leaks Air Induction System Leaks Spark Plugs Loose Cooling System Leaks EVAP System Leaks	Perform a visual and audible inspection.
SNAP Secondary Ignition	Perform a visual and audible inspection.
RAP, ROAR Exhaust System Leaks Thermactor System	Perform a visual and audible inspection. Inspect exhaust system.
KNOCK Connecting Rod Bearings Worn Main Bearings Worn Piston Pins Loose Piston to Bore Clearance Detonation (Spark Knock), See CHART 14	Check engine mechanical condition.