ENGINE MECHANICAL Page DESCRIPTION .................................................. EM-2 TROUBLESHOOTING ......................................... EM-4 ENGINE TUNE-UP ............................................ EM-7 IDLE AND/OR 2,500 RPM HC/CO CONCENTRATION CHECK METHOD ................. EM-18 COMPRESSION CHECK ..................................... EM-20 TIMING BELT ................................................... EM-22 CYLINDER HEAD ............................................. EM-32 CYLINDER BLOCK ............................................ EM-63