Restore lost compression and eliminate exhaust oil burn with the Acura TSX K24Z3 Remanufactured Engine across daily highway miles. This 2.4L 4-Cylinder 16-Valve DOHC long block features intake variable timing control and an integrated single exhaust port cylinder head. Diamond plateau honing eliminates ring seating delays. Mechanics must prime the oil pump prior to startup to protect camshaft journals.

High-pressure die-cast aluminum constructs the open-deck block casting marked K24Z3 and R40/RL5, fitted with centrifugal cast iron cylinder liners. A micro-polished R40 forged steel crankshaft rotates in align-honed main saddles beneath a 16-Valve DOHC aluminum cylinder head. Dry long block weight measures 210 lbs. The shipping crate envelope spans 38in length, 38in width, and 38in height, with the lower aluminum oil pan holding 4.4 quarts of synthetic motor oil.

Key Features of Acura K24Z3

Automotive repair facilities buy Acura TSX K24Z3 remanufactured engine assemblies to restore original compression and pass state emissions testing without trouble codes. This precision long block replaces tired powertrains in luxury sport sedans.

- Intake variable timing control phaser adjusts camshaft advance angles across mid-range engine speeds.
- Integrated single exhaust port cylinder head casting eliminates external cast iron exhaust manifolds.
- Forged steel R40 crankshaft features micro-polished journal fillets to reduce internal rotational friction.
- Centrifugal cast iron liners receive diamond plateau hone passes to seat replacement piston rings.
- Multi-layer steel cylinder head gasket withstands high combustion pressures without coolant cross-leaks.
- Hardened intake and exhaust valve seats maintain seal integrity under sustained high exhaust temperatures.
- Dual overhead camshafts drive roller rocker arms to eliminate high-RPM valvetrain parasitic resistance.

Dyno Load Precision Machining Tolerances

Dynamometer load cells confirm 201HP at 7,000 RPM and 172 ft-lbs torque at 4,400 RPM on unleaded gasoline. Crankshaft main journal runout measures within 0.0003in TIR across ground bearing surfaces. Connecting rod oil clearances hold at 0.0012in to preserve hydrodynamic oil film strength under wide-open throttle acceleration. Sump lubrication pressure sustains 65 PSI at 3,000 RPM with coolant stabilized at 195°F. Cylinder compression gauges verify 210 PSI across all four cylinders, confirming concentric valve seats and tight piston ring end-gap fitment.

Vehicle Fitment Drivetrain Guide

This K24Z3 long block fits 2009 to 2014 Acura TSX front-wheel-drive sedans and sport wagons equipped with CU2 chassis codes. The rear engine plate mates with factory 5-Speed automatic and 6-Speed manual transaxles. Starter pocket geometry matches transverse production bellhousings. This casting does not fit older 2004 to 2008 TSX chassis with multi-port exhaust K24A2 heads, all-wheel-drive CR-V platforms, or rear-wheel-drive engine swap conversions lacking transverse oil clearances.

Installation Protocol Service Intervals

The drive-by-wire throttle actuator requires zero physical cable adjustments during subframe installation. Mechanics must flush oil coolers and inspect engine mounts prior to road testing. Never install this naturally aspirated production long block in custom turbo conversions running boost pressures over 10 PSI on stock cast pistons.

- Drain initial break-in engine oil and swap the spin-on filter after 500 operating miles.
- Inspect serpentine accessory drive belt tension and fluid levels every 5,000 road miles.
- Change synthetic motor oil and filter every 3,000 miles using 5W-20 viscosity grade.

Warranty Terms Core Return Policy

Coverage provides a 3-Year Unlimited-Mile replacement warranty on internal lubricated rotating components. Core return policies allow a 30-day window with free prepaid freight pickup on like-for-like cores. The crate includes the remanufactured long block, pre-installed timing components, oil pan, valve cover, and shop installation guides.