US S13 240SX KA24E and KA24DE Engine Donors: Factory Family, Long-Block Contents and Condition Identification

The checked Nissan catalog supports 10102-40F20 -> 1010B-40F20RE for the KA24E bare/reman service path. No supersession or interchange is asserted between KA24E and KA24DE; between 10102 bare-engine and 10103 short-engine assemblies; between the Nissan service identities and ATK 331B; or between S13 and later S14, truck, Frontier/Xterra or transverse Altima/Axxess/Stanza KA applications. Similar displacement, KA-family naming or a seller's broad year range is not a chain. Manual/automatic external preparation, body-year wiring/control equipment, certified emissions hardware and every included component remain separate.

Start with the recipient 17-character VIN, model year/build, US/LHD body and emissions label, then require the donor VIN/build and readable engine, service or casting evidence. Keep the factory branches distinct: 1989-1990 Coupe/Fastback KA24E; 1991-1993 Coupe/Fastback KA24DE; and 1992-1994 Convertible KA24DE. Do not extend a catalog's production-date wording or a seller's 1989-1997/1991-2004 heading into model-year or cross-platform interchange. The checked S13 catalog assigns different bare/short-engine, block and oil-pan identities to KA24E and KA24DE, and the manufacturer guide separately identifies the S13 KA24DE long-block application; a KA24E-to-KA24DE conversion is outside this guide. Exclude S14 240SX, D21/Frontier/Xterra, Altima/Axxess/Stanza, imported Silvia/180SX CA18/SR20, non-US/RHD and turbo/performance conversions unless a separate engineered and lawful project proves every interface. Itemize block, head and covers, front/timing cover, oil pump, pan and pickup, intake/exhaust manifolds, throttle body, rail/injectors, distributor/ignition pieces, sensors, harness and ECU, alternator, starter, power-steering and A/C equipment, brackets/mounts, flywheel or flexplate/drive plate, clutch or torque-converter interfaces, cooling connections and certified emissions hardware. Manual and automatic cars require their correct external preparation; the checked catalog does not make seller package completeness automatic. Before buying used, require donor VIN/year/body/transmission and mileage basis, cold and warm compression or leak-down results for all four cylinders with method, hot oil pressure if available, startup/run evidence, blow-by, oil/coolant contamination, overheating and timing-chain history, crank end play, oil-pan/pickup and drain-thread condition, broken mounts or castings, storage/corrosion, exact contents, warranty/core terms and freight-damage procedure. Preserve the recipient's certified emissions configuration and calibration. Use qualified heavy-component lifting/support, drain fluids and follow the exact Nissan removal, installation, lubrication-priming, cooling and startup procedures.

A documented machine-shop rebuild or application-specific remanufactured long block can be safer than an unknown donor, but require the exact S13 KA24E or KA24DE branch, casting and dimensional inspection, machining report, bearing/piston sizes, cylinder-head and timing work, oil-pump and pan/pickup contents, warranty, core and installer approval. ATK 331B and seller reman labels are sourcing leads, not Nissan supersessions. Broad reman pages that combine 240SX with truck, Frontier/Xterra, Altima, Axxess or Stanza applications require written S13 VIN/casting confirmation and an exact contents sheet. A used assembly should include reproducible test results and donor provenance, not only ran-when-pulled language. No emissions defeat, turbo conversion or unsupported KA24E/KA24DE, S13/S14 or truck/passenger-car interchange is recommended.

US/LHD S13 only: 1989-1990 KA24E Coupe/Fastback; 1991-1993 KA24DE Coupe/Fastback; 1992-1994 KA24DE Convertible. Do not infer KA24E/KA24DE, S13/S14, truck/passenger-car, manual/automatic or long-block/complete-engine interchange from displacement or seller headings. Require both VINs, readable identities, emissions/transmission preparation, exact contents, compression/leak-down and oil-pressure evidence, timing/overheat history, condition, core/warranty and freight terms; retain certified emissions equipment and obtain installer approval.

Supersede reviewed 19 unique research sources for this guide. 7 also appear above as a seller or official action and are not repeated here; 12 additional citations follow.

Research last verified 2026-07-29.

1. Nissan Parts Deal — bare short engineOpen source
2. Nissan Parts Deal — bare short engineOpen source
3. Nissan Parts Deal — nissan engine bare 10102 53fa0Open source
4. Nissan Parts Deal — cylinder block oil panOpen source
5. Nicoclub — service manualOpen source
6. Nicoclub — service manualOpen source
7. Tech 240sxone — 1989 nissan 240sx service manualOpen source
8. Tech 240sxone — fsmOpen source
9. Charm — 240SX L4 2.4L (KA24DE)Open source
10. Ww2 arb ca — nissan pc a0150201 2d4 ta0Open source
11. Atkvege — engine2016Open source
12. EPA — epatamperingpolicy enforcementpolicyonvehicleandenginetamperingOpen source