Lexus 2008 IS250 Owner's Manual page 528

EXPLANATION OF MAINTENANCE ITEMS
Engine Valve Clearance (SC)
Inspect for excessive lifter noise and
engine vibration and adjust if neces-
sary. (All other models are equipped
with hydraulic valve lash adjusters that
require no periodic clearance inspec-
tion or adjustment.)
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 leakage. Tighten connec-
tions and replace parts as necessary.
Fuel Lines and Connections, Fuel
Tank Band and Fuel Tank Vapor
Vent System Hoses
Visually inspect for corrosion, dam-
age, cracks, and loose or leaking
connections. Tighten connections
and replace parts as necessary.
Fuel Tank Cap Gasket
Visually inspect for cracks, deterio-
ration and damage and replace if
necessary.
Nuts and Bolts on Chassis
Check that tightness of the seat-
mounting bolts and front/rear suspen-
68 Scheduled Maintenance Log
sion-member retaining bolts matches
torque measurements specified in the
Repair Manual.
Power Steering Fluid
When inspecting, visually check the
power steering fluid level on the see-
through reservoir. Add fluid as neces-
sary. For fluid specifications, refer to
your Owner's Manual.
Rack and Pinion Assembly
Inspect the rack and pinion assembly
for signs of leakage, damage and
loose electrical connections. Tighten
connections and if you discover any
leakage or damage, have it repaired
immediately by a qualified technician.
Road Test
While driving the vehicle, check for
proper operation of engine, transmis-
sion, brakes and steering. Also check
for abnormal noise or vibration from
any part of the vehicle.
Spark Plugs
Replace at specified interval. A quali-
fied technician should perform this
operation. To ensure optimum engine
performance on ES 350, replace only
with Denso FK20HR11 plugs or
equivalent.