US S14 240SX KA24DE Engine Donors: 07/1996 Service Split, Long-Block Contents and Condition Identification

OEM numbers

CHECKED S14 NISSAN CATALOG IDENTITIES: early bare engine 10102-70FH0 for the catalog's 02/1994-through-07/1996 production branch

later bare-engine rendering 10102-70FHO from 07/1996early short engine 10103-70FH0 for 02/1994 through 07/1996

and later short-engine rendering 10103-70FHO from 07/1996. The final character in the later 70FHO rendering is the letter O, while the early 70FH0 ends in digit zero

preserve that ambiguity and verify original documentation, VIN/build and installed marks instead of silently normalizing it. Checked adjacent identities are cylinder block 11000-70FH0, earlier cylinder head 11040-70F00, later cylinder head 11040-70F01 from the catalog's 10/1996 branch, oil pan 11110-53F00, manual-transmission rear engine plate 30411-40F01 and automatic-transmission rear engine plate 30411-40F11. These are verification anchors, not proof that a seller's bare, short, long-block or complete-engine package contains manifolds, accessories, harness, ECU, flywheel/flexplate, clutch/converter pieces, mounts, cooling parts, sensors or certified emissions hardware.

Supersession

No supersession is asserted between 10102-70FH0 and the catalog-rendered 10102-70FHO, or between 10103-70FH0 and 10103-70FHO; they are preserved as production branches requiring VIN/build and physical identity confirmation. No equivalence is asserted among 10102 bare-engine, 10103 short-engine, seller-defined long block and seller-defined complete engine. The checked head identities are production branches, not a whole-engine chain. Oil pan 11110-53F00 also appears in SCH-0059 as a shared adjacent S13 KA24DE component, but that relationship does not establish S13/S14 engine interchange. Manual 30411-40F01 and automatic 30411-40F11 rear plates are parallel external-preparation identities, not a transmission-conversion promise.

Fitment

Begin with the recipient and donor 17-character VINs, US/LHD identity, exact model year and production date, then photograph readable engine/service/casting marks before purchase. Keep the catalog's early and later bare/short-engine branches distinct and do not confuse digit-zero 70FH0 with letter-O 70FHO. The later cylinder-head branch begins at a different checked production point than the bare/short-engine split, so a broad 1995-1998 or S14 KA24DE listing does not prove a matched assembly. Confirm manual versus automatic preparation, including the correct rear engine plate, flywheel or drive plate/flexplate, pilot/clutch or converter interfaces and starter relationship. Match and retain the recipient's certified Federal/California engine-control and emissions configuration; checked catalogs and CARB records show production- and transmission-sensitive control branches. Itemize block, head and covers, timing/front cover, oil pump, pan and pickup, intake and exhaust manifolds, throttle body, rail/injectors, distributor/ignition pieces, sensors, harness and ECU, alternator, starter, power-steering and A/C equipment, brackets/mounts, cooling connections and emissions hardware. Exclude S13, truck/Frontier/Xterra, transverse Altima/Axxess/Stanza, imported Silvia/180SX SR20, non-US/RHD and turbo/performance engines unless a separate lawful engineered project proves every interface; this guide does not. Before buying used, require donor VIN/year/build/transmission and mileage basis; cold and warm compression or leak-down for all cylinders with method; hot oil pressure if available; startup/run evidence; blow-by, smoke, oil consumption, coolant/oil contamination, overheating and timing-chain history; crank end play; pan/pickup and drain-thread condition; mount and bellhousing threads; broken sensors/connectors; storage/corrosion; exact contents; core, warranty, startup deadline, return and freight-damage terms. Have the installer or machine shop approve the assembly and planned seals, timing, oiling and cooling service before purchase. Drain fluids and use rated hoisting, stand and freight equipment; follow the carrier's hazardous-material classification, packaging and documentation rules.

Aftermarket options

A documented exact-application remanufactured assembly or a machine-shop rebuild of the verified S14 core can be preferable to an unknown donor. Require a written build sheet, measured clearances, machining operations, block/head/crank identity, bearing and piston sizes, cylinder-head and timing/oiling work, warranty, core terms, startup requirements and installer acceptance. A used assembly should have reproducible donor tests and provenance, not only seller claims that it ran or was tested. Broad 1994-1998, KA24DE or RWD labels are sourcing leads only. Intake/exhaust, fuel, ignition, accessories, harness/ECU, flywheel/flexplate, mounts, cooling and emissions equipment remain separate unless photographed and itemized. No turbo conversion, emissions defeat, imported-engine assumption or unsupported S13/truck/transverse swap is recommended.

Before you buy

US/LHD naturally aspirated S14 240SX KA24DE only. Verify recipient/donor VIN and production, installed marks, the digit-zero 70FH0 versus letter-O 70FHO catalog rendering, manual/automatic preparation and certified control/emissions equipment. Bare, short, long-block and complete-engine labels do not define the same contents. Require reproducible compression/leak-down and condition evidence, exact accessories, warranty/core/freight terms and qualified installer approval. Seller year spans, shared oil-pan identity and KA24DE naming do not authorize S13, truck, transverse, imported, turbo or swap interchange.

Research and fitment sources

Supersede reviewed 19 unique research sources for this guide. 4 also appear above as a seller or official action and are not repeated here; 15 additional citations follow.

Research last verified 2026-07-29.

WHERE TO BUY