1994 Lexus LS400 spark plugs replace

MAINTENANCE
175 SCHEDULE A
Maintenance operations:
A = Check and adjust as necessary; I = Inspect and correct or replace as necessary; R = Replace, change or lubricate.
Service interval(Use odometer reading or
months, whichever comes first.)Maintenance services beyond 96,000 km (60,000 miles) should continue to be performed at the same intervals shown for each maintenance schedule.
Miles x 1,00013.757.511.251518.7522.526.253033.7537.541.254548.7552.556.2560MonthsMaintenance items km x 1,0001.66121824303642485460667278849096
ENGINE COMPONENTS AND EMISSION CONTROL SYSTEMS
Timing beltSee note (1)
Valve clearanceAA: Every 72 months
Drive belt See note (2)II: See note (2)
Engine oil and oil filterRRRRRRRRRRRRRRRRR: Every 6 months
Engine coolant See note (3)RR: See note (3)
Exhaust pipes and mountingsIIIII: Every 24 months
Air cleaner filterSee note (4)IIIIIIIRIIIIIIIRI: Every 6 months
R: Every 36 months
Fuel lines and connections See note (5)III: Every 36 months
Fuel tank cap gasketRR: Every 72 months
Spark plugsRR: Every 72 months
Charcoal canisterII: Every 72 months
Maintenance services indicated by a star () are required under the terms of the Emission Control Systems Warranty. See Owner’s Guide or Warranty Booklet for complete
warranty information.
 For vehicles sold in California and New York only
NOTE:
(1) If you operate your vehicle under conditions of extensive idling and / or low speed driving for a long distance such as police, taxi or door to door delivery use, replace
every 96,000 km (60,000 miles).
(2) After 96,000 km (60,000 miles) or 72 months, inspect every 12,000 km (7,500 miles) or 12 months.
(3) After 72,000 km (45,000 miles) or 36 months, replace every 48,000 km (30,000 miles) or 24 months.
(4) Applicable when operating mainly on dusty roads. If not applicable, follow schedule B.
(5) Includes inspection of vapor vent system.

MAINTENANCE
177 SCHEDULE B
Maintenance operations:
A = Check and adjust as necessary; I = Inspect and correct or replace as necessary; R = Replace, change or lubricate.
Service interval
(Use odometer reading or months,
whichever comes first.)Maintenance services beyond 96,000 km (60,000 miles) should continue to be performed at the same intervals shown for each maintenance schedule
Miles x 1,00017.51522.53037.54552.560MonthsMaintenance items km x 1,0001.61224364860728496
ENGINE COMPONENTS AND EMISSION CONTROL SYSTEMS
Valve clearanceAA: Every 72 months
Drive belt See note (1)II: See note (1)
Engine oil and oil filterRRRRRRRRR: Every 12 months
Engine coolant See note (2)RR: See note (2)
Exhaust pipes and mountingIII: Every 36 months
Air cleaner filterRRR: Every 36 months
Fuel lines and connections See note (3)III: Every 36 months
Fuel tank cap gasketRR: Every 72 months
Spark plugsRR: Every 72 months
Charcoal canisterII: Every 72 months
Maintenance services indicated by a star () are required under the terms of the Emission Control Systems Warranty. See Owner’s Guide or Warranty Booklet for complete
warranty information.
 For vehicles sold in California and New York only
NOTE:
(1) After 96,000 km (60,000 miles) or 72 months, inspect every 12,000 km (7,500 miles) or 12 months.
(2) After 72,000 km (45,000 miles) or 36 months, replace every 48,000 km (30,000 miles) or 24 months.
(3) Includes inspection of vapor vent system.

MAINTENANCE
180Spark plugs
Install new plugs of the same type as originally equipped. A
qualified technician should perform this operation.
Charcoal canister
Inspect for internal damage or clogging. Clean with
compressed air or replace if necessary. A qualified technician
should perform this operation.
CHASSIS AND BODY
Brake linings and drums
Check for scoring, burning, leaking fluid, broken parts, and
excessive wear. A qualified technician should perform this
operation.
Brake pads and discs
Check the pads for excessive wear and discs for runout and
wear, and leaking fluid. A qualified technician should perform
this operation,
Brake fluid
Check for correct levels of the brake fluid. If the level is low, add
FMVSS No. 116 DOT 3 or SAE J1703 brake fluid to the brake
reservoir. Change the brake fluid as scheduled. A qualified
technician should perform these operations.Brake line pipes and hoses
Visually check for proper installation. Check for chafing,
cracks, deterioration, and any evidence of leaking. Replace
any deteriorated or damaged parts immediately. A qualified
technician should perform these operations.
Steering linkage
With the vehicle stopped, check for excessive freeplay in the
steering wheel. Check the linkage for bend or damage.
Replace any damaged parts.
Steering gear box
Inspect the steering gear box for signs of leakage. Should you
discover any leakage, have the cause found and
corrected / repaired by a qualified technician immediately.
Ball joints and dust covers
Check the suspension and steering linkage ball joints for
looseness or damage. Check all dust covers for deterioration
or damage. A qualified technician should perform these
operations.