Upgrading your Civic Type R with a Garrett GTX2863R turbocharger unlocks substantial power gains and quicker spool, transforming the car’s responsiveness. This comprehensive guide provides a step-by-step installation sequence, covering tools, preparation, removal, installation, and post-installation checks. Follow each procedure carefully to ensure a reliable setup and better boost across the rev range.

Tools and Materials Needed

Before starting, assemble everything required. Missing a component mid-installation can lead to delays or improper sealing. Use only high-quality fasteners and gaskets to prevent boost leaks.

  • Garrett GTX2863R turbocharger (with turbine housing, compressor housing, CHRA)
  • Full turbo install kit (includes gaskets, O-rings, copper washers)
  • Socket set (metric, 8–19 mm)
  • Wrench set (combination wrenches, plus line wrenches for oil fittings)
  • Screwdriver set (flathead and Phillips)
  • Torque wrench (ft-lb and in-lb range)
  • Silicone hose connectors (4-ply, high-temp, for intake and intercooler)
  • Oil feed line (preferably braided stainless steel with -4 AN fittings)
  • Oil drain line (with correct banjo or -10 AN fitting)
  • Intercooler piping (if upgrading from stock, ensure 2.5″ or 3″ diameter)
  • Fresh gaskets for manifold, downpipe, and oil return
  • Shop towels and a catch pan for residual fluids
  • Penetrating oil (e.g., WD‑40 or PB Blaster) for stubborn bolts
  • Vacuum/pressure gauge for post-install leak testing

Preparation Steps

A clean, well‑lit workspace reduces the risk of dropping fasteners into the engine bay. Park the Civic Type R on a level surface and allow the engine to cool completely – the turbo and exhaust manifold retain heat for over an hour after shutdown.

Disconnect the negative battery terminal using a 10 mm wrench. This prevents accidental short circuits and protects the ECU during electrical disconnections. Next, remove the engine cover by unscrewing the four retention bolts (8 mm socket). Set the cover aside in a safe location.

If the car has an aftermarket intake, remove the air box and MAF housing. For a completely stock car, unclip the OEM intake boot from the throttle body and turbo inlet. Label each hose and connector to simplify reassembly.

Removing the Stock Turbocharger

Access and Preliminary Disconnections

Start by draining the engine oil and coolant if you plan to replace the lines or if the turbo is oil‑cooled via the engine’s coolant circuit. This step is often skipped but strongly recommended – fresh fluid prevents contamination. Remove the under‑tray (10 mm bolts) to access the downpipe and oil drain line.

Using a 12 mm socket, unbolt the downpipe from the turbine outlet. The bolts are usually tight – apply penetrating oil and let it soak for five minutes. Support the downpipe with a jack stand or a helper to avoid stressing the flex joint.

Disconnecting Oil and Coolant Lines

The stock turbo uses a water‑cooled CHRA. Disconnect the coolant hoses at the banjo fittings – be ready for coolant spillage (have a catch pan and towels). For the oil feed line, use a line wrench (often 14 mm or 17 mm) to prevent rounding the nut. The oil drain line is typically a rubber hose with a spring clamp; slide the clamp back and pull the hose free.

Unbolting the Turbo from the Manifold

Remove the heat shield over the turbo (two or three 10 mm bolts). Then, using a 14 mm socket and a breaker bar, unscrew the four nuts securing the turbo to the exhaust manifold. Work in a cross pattern to avoid warping the mounting flange. Once all nuts are removed, carefully lift the turbo straight up, tilting it slightly to clear the chassis rail. Inspect the manifold flange for any warping or cracks – address issues before installing the new turbo.

Installing the Garrett GTX2863R Turbocharger

Turbo Preparation

Unpack the Garrett GTX2863R and verify the part number matches your application. Confirm the turbine housing A/R ratio (recommended 0.64 for quick spool on the K20C1 engine). Install the supplied oil restrictor in the oil feed port if your engine’s oil pressure exceeds 80 psi at idle – many Civic Type R builds require a 0.035″ restrictor.

Apply a light coat of anti‑seize to the threads of the manifold studs and downpipe bolts. Place new gaskets on the manifold flange and the downpipe flange. Do not use RTV silicone on exhaust gaskets – it can cure and block the passage.

Positioning and Securing the Turbo

Lift the GTX2863R into position, aligning the CHRA ports with the oil feed and drain openings. Ensure the compressor outlet faces upward and toward the intercooler piping path. Hand‑tighten the four manifold nuts gradually in a star pattern. Then torque them to 35 ft‑lb (check manufacturer specifications – typically 30‑40 ft‑lb). Repeat for the downpipe nuts, torquing to 40 ft‑lb.

Reconnecting Fluid Lines

Attach the oil feed line using new copper washers. Torque the banjo bolt to 18 ft‑lb – overtightening can crack the CHRA housing. Connect the oil drain line with a new gasket and secure it with a worm‑gear clamp. For the coolant lines, connect the two hoses to the CHRA ports (no specific orientation – flow direction is bidirectional on Garrett water‑cooled CHRAs). Use the supplied spring clamps or constant‑tension clamps to ensure a leak‑free seal.

Connecting the Intake and Intercooler Piping

Intake Side

Install a 3” silicone coupler onto the compressor outlet, then slide the intake pipe over it. Use a T‑bolt clamp on each side, torquing to 3‑4 ft‑lb (do not overtighten – silicone can deform). If your Civic Type R has a MAF sensor, transfer it to the new intake pipe. Ensure the MAF sensor is oriented correctly (airflow arrow points toward the turbo).

Intercooler and Charge Piping

Upgrading the intercooler is highly recommended – the stock unit becomes a restriction at 400+ hp. For this guide, assume you are using a stepped core intercooler (e.g., PRL or Mishimoto). Connect the hot side pipe from the turbo compressor outlet to the intercooler inlet. Use silicone hoses and bead‑rolled ends to prevent blow‑off. Connect the cold side pipe from the intercooler outlet to the throttle body. Torque all clamps evenly (around 4 ft‑lb).

Final Steps and Testing

Reassembly and Electrical Checks

Reinstall the engine cover, under‑tray, and any heat shields removed earlier. Reconnect the battery and verify that all electrical connectors (e.g., MAF, wastegate solenoid, O2 sensors) are plugged in. Prime the oil system by disconnecting the fuel pump relay (or pulling the fuse) and cranking the engine for 10‑15 seconds until the oil pressure warning light extinguishes. Reconnect the relay.

Leak Detection and Idle Check

Start the engine and let it idle for 2‑3 minutes. Listen for exhaust leaks (a ticking sound near the manifold) and inspect all oil and coolant connections for drips. Use a boost leak tester (available from any tuning retailer) to pressurize the intake system to 20 psi. Listen for hissing – any leak must be fixed before driving.

Test Drive and Tuning

Take the car for a gentle 5‑mile drive, keeping boost below 10 psi to allow the new turbo to break in. Afterward, check fluid levels and re‑torque the manifold nuts (they may settle after heat cycles). For full benefit, schedule a professional ECU calibration – the GTX2863R requires a revised fuel map, timing changes, and boost control adjustment. A tune by a certified Dyno‑Jet operator will safely deliver 400‑450 whp on pump gas.

Performance Expectations and Supporting Mods

With the GTX2863R installed, the Civic Type R gains a broader powerband. Expect full boost (28‑30 psi) by 3,800 rpm, compared to 4,400 rpm with the stock turbo. This translates to stronger mid‑range punch and a peak power increase of 80‑100 wheel horsepower when combined with a downpipe, intake, and intercooler. For maximum reliability, upgrade the fuel system (high‑pressure fuel pump and injectors) and consider a catch can to reduce oil vapor recirculation.

External Resources and Further Reading

Conclusion

Installing a Garrett GTX2863R turbocharger on your Civic Type R is a proven upgrade that delivers measurable gains in boost response and peak power. By meticulously following the removal, installation, and final testing steps outlined above, you can achieve a reliable and high‑performance setup. Always verify fitment with your specific model year, and invest in professional tuning to unlock the full potential of the new turbo.