2006 Lexus GS 300 Scheduled Maintenance Guide - Page 29

M A I N T E N A N C E E X P L A N AT I O N OF MAINTENANCE ITEMS and organic acids). A qualified technician should perform this operation. Note: Initial replacement is at 120 months/100,000 miles. Replace every 60 months/50,000 miles thereafter. Engine Oil and Oil Filter Exhaust Pipes and Mountings Visually inspect the exhaust pipes, muffler and hangers for cracks, deterioration and damage. Start the engine and listen carefully for any exhaust gas leakage. Tighten connections or replace parts as necessary. Fuel Lines and Connections, Fuel Tank Band and Fuel Tank Vapor Vent System Hoses Replace the oil filter and drain and refill the engine oil at specified intervals. For recommended oil grade and viscosity, refer to your Owner's Manual. Some models are equipped with a replaceable oil filter element and oil filter cap O-ring; replace both at each oil change. Refer to your Owner's Manual. Engine Valve Clearance (except GS 300 and IS) Visually inspect for corrosion, damage, cracks and loose or leaking connections. Tighten connections or replace parts as necessary. Fuel Tank Cap Gasket Visually inspect for cracks, deterioration and damage and replace if necessary. Nuts and Bolts on Chassis Inspect for excessive lifter noise and engine vibration and adjust if necessary. A qualified technician should perform this operation. (The GS 300 and IS are equipped with hydraulic valve lash adjusters, which require no periodic clearance inspection or adjustment.) Re-tighten the seat mounting bolts and front/rear suspension member retaining bolts to specified torque. 66 S c h e d u l e d M a i n t e n a n c e L o g