2004 Lexus IS 300 Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Torque Specification

TIGHTENING TORQUE SPECIFICATION

Part tightened N.m kgf.cm ft.lbf
Fuel line: Union bolt
Flare nut for use with SST
for use without SST		 29
30
38		 300
310
387		 22
22
28
Fuel tank vent tube set plate x Fuel tank 3.5 36 31 in.lbf
Fuel inlet hose x Body 9.0 90 80 in.lbf
Delivery pipe x Intake manifold 21 210 15
Fuel pressure pulsation damper x Fuel pipe support 32.5 325 24
Fuel inlet pipe x Intake manifold 9.0 90 80 in.lbf
No. 2 vacuum pipe x Intake manifold 21 210 15
Fuel sender gauge x Fuel tank 1.5 15 13 in.lbf
Fuel tank band x Body 39 400 29
MAF meter x Air cleaner 10.7 109 8
Throttle body bracket x Throttle body 21 210 15
Throttle body bracket x Cylinder head 21 210 15
Throttle position sensor x Throttle body 1.7 17.5 15 in.lbf
Throttle control motor x Throttle body 3.7 37.5 33 in.lbf
Throttle control motor cover x Throttle body 1.7 17.5 15 in.lbf
Accelerator pedal position sensor x Throttle body 3.7 37.5 33 in.lbf
Camshaft timing oil control valve x No. 3 camshaft bearing cap 8.0 80 71 in.lbf
No. 3 timing belt cover x Cylinder head cover 8.0 80 71 in.lbf
Intake air connector x Air intake chamber 28 280 21
Air intake chamber x Intake manifold 28 280 21
Vacuum control valve set x Intake manifold 21 210 15
ECT sensor x Cylinder head 19.6 200 14
Knock sensor x Cylinder block 44 450 33
PS pump rear stay x Manifold stay 39.2 400 29
PS pump rear stay x PS pump bracket 39.2 400 29
Heated oxygen sensor x Exhaust manifold 45 450 33
Heated oxygen sensor x Front exhaust pipe 45 450 33
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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