K-series engine and transmission (K20/K24)

K-series engine and transmission (K20/K24)

Engine K-series swap (K20A2 / K24) Verified Modification Required

Compatibility Overview

Source Vehicle

RSX Type-S

Generation: DC5

Years: 2002-2004

Target Vehicle

Civic

Generation: EG

Years: 1992-1995

Installation Difficulty

Easy Basic tools
Moderate Some experience
Difficult Skilled work
Expert Professional

Reference

B16A specs → B18C specs → F20C specs → H22A specs → K20A specs → K24A specs → C20AT specs → D14A1 specs → D17A specs → K20Z4 specs → LEB-H5 specs → R20A6 specs → R18Z6 specs → B18A specs → D15A1 specs → EW5 specs → J25A specs → B20B specs → K24A3 specs → K20Z2 specs → B18A1 specs → B18C-00-Spec-R specs → B18B specs → B18C-96-Spec-R specs → B18C-98-Spec-R specs → B18C-SiR-G specs → K20A-RAA specs → K24A-RBB specs → C32B specs → C30A specs → L15ZF specs → L15BU specs → L13B specs → ZC SOHC specs → ZC SOHC Carb specs → ZC DOHC Gen2 specs → ZC SOHC VTEC specs → B16A SiRII specs → F18B specs → F20B-CF4 specs → F20B specs → K24A8 specs → K24A4 specs → K24W1 specs → K20Z3 specs → K24Z7 specs → K24Z3 specs → K24Z2 specs → K24A2 specs → K24A1 specs → K20A3 specs → D16A6 specs → ZC DOHC specs → K20Z1 specs → K20A2 specs → D16Z6 specs → D16W4 specs → EA specs → EC specs → ED specs → EL 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 → PRB Cylinder Head → PLE Cylinder Head → PRB-A00 Cylinder Head → PRB Fuel injector → PRB Throttle body → RNE ECU → PRB ECU → PRB-A10 Intake Manifold → PRB-A00 Intake Manifold → PLE → PRB → PRB → PRB →
A non-CR-V K24 requires the CR-V passenger-side engine mount to locate correctly; CR-V K24 engines already have it. Wiring uses an RSX Type-S 02-04 engine and charging harness with an RSX PRB 02-04 ECU on Hondata K-Pro (or a JDM ECU). K-Pro only recognizes the 02-04 RSX-S primary oxygen sensor; EP3 and 06+ Civic Si sensors do not work. Type-S injectors support roughly 250 hp on a stock head/block. The clutch slave cylinder mounts to the front of the transmission and is mandatory unless the donor transmission already includes one. Belt length depends on configuration: a K24 with no P/S or A/C uses a 52-inch 6-rib belt (Dayco #5060520); a K20 uses 50.5 inch; measure with string for any A/C combination. Shifter conversion uses a Karcepts mounting kit, RSX Type-S shifter box, and RSX-S 02-04 cables. The pilot bearing (22103-PNA-003) is required to center the transmission input shaft. Budget roughly $8,000-$10,000 for a complete swap.
The K-series does not bolt into an EG/EK/DC2 without adapter mounts from Hasport, Hybrid, or Avid and a plug-and-play harness conversion from Hasport, Hybrid, or Sparkks. The exhaust must be custom welded (2.5-3 inch). Axles must be made from RSX Base or RSX Type-S units with B-series outers and swapped inner joints for the EG. Retaining power steering on an EG requires cutting the hood for pulley clearance (Jackson Racing pulley 052-154 clears with cutting only, no hole) or deleting power steering entirely by looping or plugging the rack and fitting an EP3 idler pulley/bracket. A stock radiator needs a Hasport billet hose adapter to accept the B/D-series fan switch and coolant sensor, or an aftermarket radiator with fabricated mounts. The stock fuel rail and filter are adapted to -6 AN with converter fittings rather than replaced. Right-hand-drive EG cars additionally need different throttle cable, clutch line, revised wiring routing, and usually a welded rear mount support.

Important Caveats

  • • The parts list is built around an EG and is approximately 95% applicable to EK and DC2; axles, belt length, and harness routing vary by chassis.
  • • ITR 5-lug hubs may not accept EG swap axles because Integra and Civic hub sizes differ; confirm before buying.
  • • The K20A3 is a weaker starting point than the K20A2 for performance builds.
  • • Custom exhaust fabrication and, on some builds, hood cutting may raise engineering-certification or compliance concerns in inspected jurisdictions.

DIY Installation Guide

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Community Verification

1
user verified this swap
By Froth via K20A.org
Added 1 day ago

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Sources & References

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