Honda Accord Crosstour CR-V K24Z2/3 K24Y2 2.4L L4 Engine 12486E 2008-2015

Description

Cold start variable valve timing actuator chatter and timing chain guide wear disrupt high mileage midsize passenger fleets. The Honda Accord K24Z2 2.4L Engine resolves these persistent mechanical valvetrain rattles during commercial long block repower projects. Producing 177HP, this 2.4L 4-Cylinder engine requires verified intermediate shaft alignment to avoid front axle seal fluid leaks upon chassis drop-in.

ASTM A356-T6 cast aluminum forms the deep-skirt engine block with cast-in iron liners for high structural integrity. This Honda engine core incorporates an induction-hardened forged steel crankshaft marked R40 riding on tri-metal bearings and stellite exhaust valves. Starter draw pulls 145A at 12V across initial bench crank verification. Total unrigged weight measures 210 lbs within dimensions of 38in length, 38in width, 38in height, with a 4.4 quarts oil capacity.

Key Features of Honda K24Z2

Fleet operators buy Honda K24Z2 commercial long block engines to eliminate chronic timing chain stretch during industrial engine rebuild operations. Diamond hone equipment restores precise crosshatch cylinder wall patterns to ensure immediate piston ring seal and reduced oil consumption.

• Left bellhousing stamped K24Z2 and cast R40 validates authentic factory casing architecture.
• Internal dual balance shafts cancel secondary engine vibration to ensure smooth commercial operation.
• Hardened intake camshaft lobes prevent premature valvetrain wear across high mileage fleet cycles.
• Crankshaft casting stamped R40 delivers superior torsional resistance under sustained acceleration.
• The K24Z2 commercial core integrates an upgraded timing chain tensioner to stop tooth skip.
• Multi layer steel head gaskets eliminate coolant weep between aluminum deck surfaces.
• Tri-metal rod and main bearings maintain reliable oil boundary layers under elevated engine load.
• High temperature Viton crankshaft seals prevent oil leakage into the front timing chain cover.

Dynamometer Output Testing Parameters

Dynamometer bench runs confirm 177HP at 6500 RPM and 161 ft-lbs torque at 4300 RPM under continuous testing loads. Lubrication gallery pressure registers 55 PSI at an operating oil sump temp of 195°F. Cylinder compression maintains 185 PSI across all four cylinders with cylinder to cylinder variation restricted below 4%. Crankshaft journal runout remains under 0.0003in TIR across all five main bearings. This K24Z2 long block engine maintains continuous exhaust gas temp readings below 1300°F during extended dynamometer test cycles.

Chassis Application Platform Coverage

Direct bolt-in fitment covers 2008 to 2012 Honda Accord LX and EX sedan models on the CP2 chassis, 2010 to 2015 Honda Crosstour 2.4L, and 2012 to 2014 Honda CR-V K24Y2 platforms. It bolts direct to factory 5-speed automatic transmissions, utilizing original factory motor mount brackets and exhaust downpipe assemblies.

Field Usability Maintenance Protocols

Drive by wire throttle system connections require clean electrical ground paths showing under 0.2 ohms resistance. Technicians must note this long block is NOT engineered for manual transmission Civic Si K24Z7 platforms or high output Accord EX-L K24Z3 applications due to differing intake camshaft profiles, dual exhaust ports, and distinct knock sensor locations.

• Drain initial break-in engine oil after 500 road miles or 20 operating hours.
• Measure cold valve lash to 0.009in intake and 0.011in exhaust on cold cylinder heads.
• Clean the rear cylinder head VTEC solenoid screen before filling with fresh engine oil.

Certified Warranty Crate Manifest

Supported by an extensive 3-Year 100,000-mile parts warranty, this rebuild adheres to strict Honda assembly standard protocols. The heavy duty shipping crate contains the complete long block core, cast aluminum oil pan, timing chain cover, valve cover, oil pickup tube, and signed bench dynamometer verification records.