Nissan 90 ~93 free download

File name engine overhaul procedures.pdf

ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION 1993 Nissan Sentra Engine Overhaul Procedures - General Information ALL PISTON ENGINES * PLEASE READ THIS FIRST * Examples used in this article are general in nature and do not necessarily relate to a specific engine or system. Illustrations and procedures have been chosen to guide mechanic through engine overhaul process. Descriptions of processes of cleaning, inspection, assembly and machine shop practice are included. Always refer to appropriate engine overhaul article in the ENGINES section for complete overhaul procedures and specifications for the vehicle being repaired. ENGINE IDENTIFICATION The engine may be identified from its Number (VIN) stamped on a metal tab. Metal tab different locations depending on manufacturer. number or serial number is located on cylinder with manufacturer. Vehicle Identification may be located in Engine identification block. Location varies INSPECTION PROCEDURES * PLEASE READ THIS FIRST * NOTE: Always refer to appropriate engine overhaul article in the ENGINES section for complete overhaul procedures and specifications for the vehicle being repaired. GENERAL Engine components must be inspected to meet manufacturer's specifications and tolerances during overhaul. Proper dimensions and tolerances must be met to obtain proper performance and maximum engine life. Micrometers, depth gauges and dial indicator are used for checking tolerances during engine overhaul. Magnaflux, Magnaglo, dyecheck, ultrasonic and x-ray inspection procedures are used for parts inspection. MAGNETIC PARTICLE INSPECTION Magnaflux & Magnaglo Magnaflux is an inspection technique used to locate material flaws and stress cracks. The part in question is subjected to a strong magnetic field. The entire part, or a localized area, can be magnetized. The part is coated with either a wet or dry material that contains fine magnetic particles. Cracks which are outlined by the particles cause an interruption in the magnetic field. The dry powder method of Magnaflux can be used in normal light. A crack will appear as an obvious bright line. Fluorescent liquid is used in conjunction with a blacklight in a second Magnaflux system called Magnaglo. This type of inspection demands a darkened room. The crack will appear as a glowing line in this process. Both systems require complete demagnetizing upon completion of the inspection. Magnetic particle inspection applies to ferrous materials only. PENETRANT INSPECTION Zyglo The Zyglo process coats the material with a fluorescent dye penetrant. The part is often warmed to expand cracks that will be penetrated by the dye. When the coated part is subjected to inspection with a blacklight, a crack will glow brightly. Developing solution is often used to enhance results. Parts made of any material, such as aluminum cylinder heads or plastics, may be tested using this process. Dye Check Penetrating dye is sprayed component. Dye is left on component material dens