Piston slap: Slapping sound produced by a worn out piston moving up and down in the engine cylinder. Related posts: Combustion chamber Shimmy Cylinder Piston displacement AE8402 Aircraft Systems and Instruments Syllabus AT8091 Manufacturing of Automotive Components Syllabus Piston skirt Hazard Flasher Oil galleries AT8601 Automotive Engine Components Design Syllabus Engine capacity Wheel cylinder or Slave cylinder Cylinder block Piston Bottom Dead centre (BDC) Displacement Cylinder head Blow-by Clearance volume Compression ratio Read more articles Previous PostPiston skirt Next PostPlastigage