K24Z7 engine

K24Z7 engine

Engine K-series engine transplant Verified Modification Required

Compatibility Overview

Source Vehicle

Civic Si

Generation: 9th generation (FB6/FG4)

Years: 2012-2015

Target Vehicle

Civic

Generation: EG

Years: 1992-1995

Installation Difficulty

Easy Basic tools
Moderate Some experience
Difficult Skilled work
Expert Professional

Reference

K24Z7 specs → K24A1 specs → K20A2 specs → RNA Cylinder Head → PLE Cylinder Head → RNA ECU →
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).
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.

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.

DIY Installation Guide

No Installation Guide Yet

Have you completed this swap? Help the community by sharing your step-by-step installation guide!

Submit a Guide Browse All Guides

Community Verification

1
user verified this swap
By vanilla gorilla via Honda-Tech
Added 7 hours ago

Find Parts

Looking for parts for this swap? Check out our recommended retailers:

Some links are affiliate/sponsored links — we may earn a commission at no extra cost to you. Disclosure.

Sources & References

Comments (0)