ES300 — NEW FEATURES 11 4. Valve Mechanism Camshaft Along with the adoption of the VVT-i system, a VVT-i controller has been installed on the back of the intake camshaft to vary the timing of the intake valves. The valve lift and the valve timing have been changed to improve engine performance. VVT-i Controllers Intake Camshaft Exhaust Camshaft 157EG22 Specifications Model Item ’99 Model ’98 Model Valve Lift mm (in.) Intake 8.62 (0.34) 7.8 (0.31) Exhaust 8.40 (0.33) 7.6 (0.30) Valve Timing Intake Open − 4° ~ 56° BTDC 4° BTDC Close 60° ~ 0° ABDC 44° ABDC Exhaust Open 54° BBDC 46° BBDC Close 2° ATDC