title: Automotive Engines: Diagnosis, Repair, Rebuilding
author:  Tim Gilles 
description: An automotive teacher for 38 years, Tim Gilles is professor emeritus in the Automotive Technology Department at Santa Barbara City College, has authored or coauthored several textbooks, and has been active in professional associations for many years. He has served as president and a board member of the California Automotive Teachers (CAT), a board member and election committee chair of the North American Council of Automotive Teachers (NACAT), a member of the California Community College Chancellor's Trade and Industry Advisory Committee, and Education Committee chair for the Santa Barbara Chapter of the Independent Automotive Professionals Association. Mr. Gilles has also served several terms as a board member of the Santa Barbara Automotive Service Council and is active in industry associations such as AERA, The Automotive Repair Coalition, and IATN, including presenting at numerous conferences. Mr. Gilles has held the industry certifications of ASE Master Automotive Technician and ASE Master Engine Machinist.
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  1 | P a g e  
   
   
  Piston Diagnosis 
  The process of examining used pistons can tell us a lot of helpful information on the condition of an 
  engine. When engine failure does occur the pi
  examination of it frequently helps us trace the sourc
  caused the failure. This article serves as a guide for the most common mechanical problems we've 
  seen over the years that plague engines.
  If you require an engine rebuild due to failure then please supply the 
  that we are able to more accurately diagnose the cause of the failure and take appropriate action to 
  prevent it reoccurring. 
   
  Generally well set up 
   
   
   
   
  Piston Diagnosis – A rough Guide 
  The process of examining used pistons can tell us a lot of helpful information on the condition of an 
  engine. When engine failure does occur the piston is likely to take most of the damage. Careful 
  examination of it frequently helps us trace the source of the mechanical or tuning problem that's 
  article serves as a guide for the most common mechanica