Parts for your 2005 Lexus Is-Thrust bearing

2005 Lexus IS thrust bearing — what it does and when to sort it

Yes, a thrust bearing is fitted to the 2005 Lexus IS. Factory service information in the Toyota/Lexus Technical Information System (TIS) for the IS200/IS300 (1G‑FE and 2JZ‑GE) specifies crankshaft thrust bearing surfaces at the centre main to control end‑float. The early second‑gen IS250’s 4GR‑FSE engine uses an integrated thrust bearing in the main bearing set as well. Core references like the Bosch Automotive Handbook and engine bearing catalogues from major OE suppliers describe this as standard practice on inline petrol engines, so it squarely applies to 2005 IS models.

On these cars, the crankshaft thrust bearing keeps the crank from shuffling forward and back in the block when the clutch is pressed (manuals) or when the torque converter and accessory drives load the crank (automatics). By controlling axial movement, it protects the crank, bearings, timing gear, and transmission input end from ugly wear.

It’s not a routine service item like filters or plugs. Instead, it’s checked when there are symptoms or the engine is open. If there’s inconsistent clutch engagement, a faint metallic rub at idle that changes when the clutch is pressed, or visible fore‑aft movement at the crank pulley, end‑float should be measured. Technicians use a dial indicator on the crank nose and compare to the spec in TIS, if it’s out, the thrust bearing and related components need attention.

Replacement is done with the sump and main bearing caps off (engine out or subframe‑down depending on model). The correct‑size bearing set is fitted, journals are inspected and measured, and end‑float is verified on assembly. Good oil pressure and clean oil are essential to bearing life, so regular servicing pays off. For manual cars, avoiding riding the clutch reduces axial loading and helps the thrust faces live longer.

• Check end‑float if the clutch or gearbox is out, it’s a smart add‑on test.
• Use quality OE‑equivalent bearings and follow TIS torque and clearance specs.
• If end‑float is excessive, inspect the crank thrust faces for wear before reassembly.

Note: some catalogues call the manual’s clutch release (throwout) bearing a “thrust” bearing. That’s a separate part from the engine’s crankshaft thrust bearing.

Popular questions about 2005 Lexus IS thrust bearings

What are the signs a thrust bearing is worn on a 2005 IS?
Common clues are a change in engine note at idle when the clutch is pressed, inconsistent clutch bite point, or measurable in‑out movement of the crank pulley. A proper diagnosis uses a dial indicator to check crank end‑float against the TIS spec.

Do automatic 2005 IS models have a thrust bearing too?
Yes. All the petrol engines used across the 2005 IS range use a crankshaft thrust bearing. Automatics can still load the crank axially via the torque converter and accessory drives, so the thrust bearing is just as important.

Should the thrust bearing be replaced during a clutch job?
It isn’t mandatory, but it’s smart to measure crank end‑float while the driveline is apart. If readings are near or past the limit, plan bearing replacement and inspect the crank’s thrust faces before the car goes back together.