Engine Noisy
Engine NoisyAbnormal engine noise often consists of various noises originating in rotating parts, sliding parts and other moving parts of the engine. It is, therefore, advisable to locate the source of noise systematically.
Troubleshooting Procedure for Crankshaft Journals or Crankshaft Bearing Noise
Troubleshooting Procedure for Connecting Rods or Connecting Rod Bearing Noise
Short out each spark plug in sequence using insulated spark plug wire removers. Locate cylinder with defective bearing by listening for abnormal noise that stops when spark plug is shorted out.
Troubleshooting Procedure for Piston and Cylinder Noise
Abnormal noise stops when the spark plug on the cylinder with defective part is shorted out.
Troubleshooting Procedure for Piston Pin Noise
Short out each spark plug and listen for change in engine noise.
Troubleshooting Procedure for Slapping or Hitting etc Noise
The slapping sound stops when spark plug on bad cylinder is shorted out.