K24Z7 engine
into Civic (from Civic Si)

FB6 Civic Si 2012-2015
→
EG Civic 1992-1995

Yes: the K24Z7 engine from the Civic Si (2012-2015) fits the Civic (1992-1995) — difficult difficulty, modifications required.

Verdict
Fits.
Verified entry · modifications required
Verified ✓
Difficulty
Difficult
Mods
Required
Category
Engine

Installation notes

Completed, running swap documented by the builder, with a full video how-to series (parts, wiring, ECU) on the BallsOutPerformance YouTube channel; at the time there was essentially no other public information on swapping the K24Z7. Key fitment facts from the thread: a K20 transmission bolts up to the K24Z7 block (confirmed by the builder); the builder ran the A2 halfshaft with regular Driveshaft Shop swap axles. For the closely related EK-chassis version discussed in the thread: Hasport EKK5 mounts were used and the rear engine subframe had to be changed to fit; non-engine electrics (wipers, lights, etc.) keep working as stock, and a good EK power pick-up point for engine wiring is the driver's strut tower plug (large wire to starter; BLK/YEL fused at 15 A for ignition coils; YEL/BLK for ECU feed; second BLK/YEL for O2 sensors; BLK ground; YEL/GRN temp gauge; YEL/RED oil pressure light; WHT/BLU alternator L terminal / battery warning light).
ModsMods req.

Required modifications

This is a K-swap, so the EG needs K-series swap mounts, swap axles and custom wiring. In the documented build the only Z7 part available was the engine itself, so the factory K24Z7 harness and ECU were not used - an AEM standalone engine management system was fitted instead, paired with a non-Z7 (RSX-S type) K-series transmission. Axles were an A2 intermediate (half) shaft with Driveshaft Shop swap axles. If a complete donor car is available, the budget route is to use the donor's factory ECU and wire harness plus the key and ignition lock cylinder with its immobilizer ring - but factory K24Z7 ECU pinouts are hard to obtain (service-manual pages/wiring schematics can be purchased, e.g. via Honda or Justanswer), and with the full Z7 setup the only tuning option is believed to be Hondata FlashPro.

Caution

Important caveats

  • Factory K24Z7 ECU pinouts and wiring schematics are not freely available online - budget for a standalone EMS or source complete donor electronics (ECU, harness, key, immobilizer ring) plus paid service-manual documentation.
  • Aftermarket mount availability for the Z7's own transmission is poor (Innovative reportedly had no EG mounts for the Z7 transmission at the time) - the documented build used an RSX-S type transmission instead.
  • With a complete factory Z7 ECU/harness setup, FlashPro is believed to be the only tuning option.

No guide yet — write one or browse all guides.

Reference

K20A specs → K24A specs → D14A1 specs → K20Z4 specs → LEB-H5 specs → K24A3 specs → K20Z2 specs → B18A1 specs → K24A8 specs → K24A4 specs → K24W1 specs → K20Z3 specs → K24Z7 specs → K24Z3 specs → K24Z2 specs → K24A2 specs → K24A1 specs → K20A3 specs → D16A6 specs → B18B1 specs → K20Z1 specs → K20A2 specs → D16Z6 specs → B18C2 specs → B18C7 specs → D16W4 specs → EA specs → EC specs → ED specs → EE specs → EG specs → EK specs → EL specs → EM specs → EN specs → EP specs → ER specs → ES specs → ET specs → K20A1 specs → K20A4 specs → K20A6 specs → K20A7 specs → K20A9 specs → K20B specs → K20Z5 specs → K24V5 specs → K24V7 specs → K24W specs → K24W4 specs → K24W7 specs → K24W9 specs → K24Y1 specs → K24Y2 specs → K24Z1 specs → K24Z4 specs → K24Z5 specs → K24Z6 specs → LEC-H5 specs → RNA Cylinder Head → PLE Cylinder Head → RNA ECU → PLE → RNA →

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Sources

1 ref
  1. 01 https://honda-tech.com/forums/hybrid-engine-swaps-18/how-k24z7-swap-eg-civic-complete-how-3334758/
Submitted by vanilla gorilla via Honda-Tech Added Updated

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