Mitsubishi Eclipse II technical information manual page 24

text version of content this owner's manual page from owners manual to the vehicle Mitsubishi Eclipse, year of production 1995 - 1999:

ENGINE - Base Engine l-3 BASE ENGINE LCYLINDER HEAD N71ABOlAA der metal valve guides and seats. Integral oil galleys Features a Dual Over Head Camshaft (DOHC) within the cylinder head supplies oil to the hydraulic 4-valves per cylinder cross flow design. The valves are arranged in twoinline banks. Incorporatedpow- lash adjusters, camshaft and valve mechanisms. CYLINDER BLOCK AND BED-PLATE N7lAB02AA plate design makes for a much stronger lower end Five different engine designs were considered, the because it ties all of the main caps together to sub- only engine design that met all the criteria was one stantially improve block stiffness. The block is a that utilized a bed-plate. There are several forces at work in the lower end of an engine block. two-piece assembly, encompassing the bed-plate These are: and the cylinder block. The bed-plate is made of l Vertical bending cast iron and is totally separable from the block. When installed, it becomes part of the block and l Horizontal bending - 90 degrees to the cylinder bore strengthens the lower end considerably. The bed- plate and block are cast separately, then machined l Torsional bending along the crankshaft axis together. Once machined, the bed-plate and block l Individual main cap flutter co-inciding to indi- vidual cylinder firing are drilled and doweled together to become a mated All these factors contribute to noise, vibration and unit. This ensures that the bed-plate and block are in perfect alignment even after assembly and disas- harshness. Because this is a four cylinder engine, sembly. design criteria becomes even more important.Bed- PISTON N7lAB03AA is used for additional cylinder compression control. The piston has an oval shape (elliptical) that expands Both compression rings are 1.2 mm (.0472 in.) thick. as the engine warms-up. This reduces cold engine The oil ring is a three piece design using chrome piston noise, helps the piston fit into the bore better id and avoids piston scuffing. faced fails and a separate center expander. Use the running clearance notches and is identifiable The piston pin has a 1 mm (.0394 in.) offset toward by a slight dish at the top of the piston. the thrust side of the piston for improved noise char- This engine is pressed-in piston pins to attach forged acteristics. The top ring is a steel unit with a plasma powder metal connecting rods. Incorporate hex head sprayed molybdenum faced center section for reli- able compression sealing. The upper ring is not cap screw threaded into the connecting rod. Piston and Rods are serviced as an assembly. directional. The black coating as a rust preventative. A taper faced cast iron second compression ring I / No. 1 piston ring No. J 1 2 piston ring1 \ Side rail L extender Oil ring CENO066

owners manual Mitsubishi Eclipse

owners manual Mitsubishi Eclipse - year of production: 1995, 1996, 1997, 1998, 1999 - Mitsubishi Eclipse II technical information manual EN