Chapter 1. GENERAL INFORMATION Precautions before Service Removal and Disassembly For prevention of wrong installation or reassembly and for ease of operation, put mating marks to the parts where no function is adversely affected. Special Tool Be sure to use Special Tools when their use is specified for the operation. Use of substitute tools will result in malfunction of the part or damage it. Tightening Torque Tighten the part properly to specified torque. Sealant Use specified brand of sealant. Use of sealant other than specified sealant may cause water or oil leaks. G643(E) Service Manual Chapter 1. General Information 7