5 New to This Edition This edition of Diesel Engine Technology contains several enhancements to help students succeed. Content has been updated throughout the textbook. Information on outdated technology has been removed or reduced, and information has been updated and clarifi ed throughout the book. Updated topics include: General safety information Piston designs and materials API oil service categories Cooling system pressure tests Battery testing and service Alternators and voltage regulators ASE certification In addition, numerous photos and illustrations have been updated or enhanced for clarity and an improved learning experience. Reviewers The authors and publisher wish to thank the following industry and teaching professionals for their valuable input into the development of Diesel Engine Technology. Theodore Chamberlin New England Tech East Greenwich, RI Charles Childers Kilgore College Longview, TX Tim Hale Vincennes University Vincennes, IN Gordon Hedrick Parkland College Champaign, IL Glen P. Hill glSource Long Beach, CA Berchman Kent Melancon San Bernardino Valley College San Bernardino, CA Zach Metzler State University of New York at Cobleskill Cobleskill, NY Adam Prusakiewicz University of Northwestern Ohio Lima, OH Michael Tingley Long Beach City College Long Beach, CA