1998 Lexus GS 400 Owners Manual - Page 361
1998 Lexus GS 400 Manual
Page 361 highlights
MAINTENANCE DOES YOUR VEHICLE NEED REPAIRING? Be on the alert for changes in performance and sounds, and visual tip-offs that indicate service is needed. Some important clues are: D Engine missing, stumbling, or pinging D Appreciable loss of power D Strange engine noises D A fluid leak under the vehicle (however, water dripping from the air conditioning after use is normal.) D Change in exhaust sound (This may indicate a dangerous carbon monoxide leak. Drive with the windows open and have the exhaust system checked immediately.) D Flat-looking tires, excessive tire squeal when cornering, uneven tire wear D Vehicle pulls to one side when driving straight on a level road D Strange noises related to suspension movement D Loss of brake effectiveness, spongy feeling brake pedal, pedal almost touches floors, vehicle pulls to one side when braking D Engine coolant temperature continually higher than normal If you notice any of these clues, take your vehicle to your 348