hyundai — Units of measurement

INTRODUCTION Terms used in this manual Nominal means the rated (design) size or magnitude of a part to be measured. Standard means the quantitative requirement for dimension of a part, clearance between parts and performance. This is given in a form of tolerance. Therefore, the values shown are not in agreement with the design values. Limit means that, if this value is reached, the part must be repaired or replaced with a new part. Abbreviations BTDC: Before Top Dead Center ATDC: After Top Dead Center BBDC: Before Bottom Dead Center ABDC: After Bottom Dead Center TIR: Total Indicated Runout API: American Petroleum Institute ASTM: American Society for Testing and Materials JIS:

Japanese Industrial Standards LLC: Long Life Coolant MIL: Military Specifications and Standards (U.S.A.) MSDS: Material Safety Data Sheet SAE: Society of Automotive Engineers (U.S.A.) Units of measurement Measurements are based on the International System of Units (SI), and their converted metric values are indicated in parentheses {}. For metric conversion, the following rates are used. Pressure: 1 MPa = 10.197 kgf/cmІ Torque: 1 N·m = 0.10197 kgf·m Force: 1 N = 0.10197 kgf Horsepower: 1 kW = 1.341 HP = 1.3596 PS Meter of mercury: 1 kPa = 0.7 cmHg Meter of water: 1 kPa = 10.197 cmH 2 O (cmAq) Rotational speed: 1min -1 = 1 rpm II