Intake variable timing control phaser rattle on cold start and timing chain guide wear create cam correlation fault codes. The Acura Honda K24Z7 Engine corrects these valvetrain timing faults during commercial long block repower operations. Producing 201HP, this high output 2.4L 4-Cylinder assembly demands precise torque verification on the single port exhaust downpipe flange to prevent exhaust leaks.

Cast from dense ASTM A356-T6 aluminum with cast-in iron cylinder liners, this Acura Honda engine core withstands elevated combustion pressure. A precision balanced AISI 4340 forged steel crankshaft marked R40 anchors the bottom end on tri-metal bearings. Starter draw pulls 145A at 12V across cold engine testing. Unrigged dry weight equals 210 lbs within dimensions of 36in length, 36in width, 36in height, with a 4.5 quarts oil pan volume.

Key Features of Acura Honda K24Z7

Performance shops buy Acura Honda K24Z7 long block assemblies to eliminate valvetrain chatter during industrial engine rebuild projects. Computer controlled line boring aligns the crankshaft journals to maintain optimum oil wedge support across sustained high RPM operation.

- Crankcase casting stamped K24Z7 and cast R40 confirms authentic factory high compression design.
- Single port cylinder head casting integrates the exhaust collector to speed catalytic reaction.
- Upgraded intake VTC cam gear eliminates cold start spring pin chatter and timing lag.
- Forged steel crankshaft marked R40 resists torsional vibration under sustained competition use.
- The K24Z7 commercial core utilizes high compression hypereutectic pistons with anti-friction skirt coatings.
- High volume oil pump module prevents high RPM cavitation to protect rod journal bearings.
- Multi layer steel head gaskets maintain positive seal across open-deck aluminum surfaces.
- Premium Viton valve stem seals eliminate oil consumption under high vacuum deceleration.

Dynamometer Inspection Load Thresholds

Dynamometer bench testing confirms 201HP at 7000 RPM and 170 ft-lbs torque at 4400 RPM under steady state evaluation sequences. Lubrication gallery operating pressure registers 58 PSI at a continuous oil sump temp of 195°F. Cylinder compression maintains 195 PSI across all four cylinders with variance staying under 4%. Crankshaft main journal runout checks show less than 0.0003in TIR. This K24Z7 long block engine keeps exhaust gas temp readings below 1350°F during simulated maximum performance dyno pulls.

Chassis Fitment Application Scope

Direct replacement fitment covers 2012 to 2015 Honda Civic Si (FB6 sedan and FG4 coupe) and 2013 to 2015 Acura ILX 2.4L models. This unit mounts direct to factory 6-speed manual transmissions with helical limited-slip differentials, utilizing original cast aluminum engine brackets and single exhaust downpipe routing without fabrication.

Field Installation Maintenance Guidelines

Drive by wire electronic throttle calibrations require undisturbed battery voltage during initial key-on relearn sequences. Technicians must note this high compression engine is NOT engineered for base K24Z2 Accord models, CR-V K24Z6 platforms, or automatic transmissions due to unique flywheel mounting, cylinder head coolant ports, and ECU fuel mapping requirements.

- Drain break-in motor oil and install a fresh oil filter after 500 miles or 20 hours.
- Inspect intake VTC oil control strainer screen for debris prior to final installation.
- Maintain cold valve lash adjustment at 0.009in intake and 0.011in exhaust across all cylinders.

Factory Warranty Freight Manifest

Supported by an industry leading 3-Year 100,000-mile parts warranty, each unit satisfies rigid Acura Honda assembly standard protocols. The reinforced wooden freight crate carries the complete long block core, cast aluminum oil pan, timing chain cover, valve cover, oil pump pickup tube, and signed dynamometer test documentation.