Installing a Garrett T28 Turbo on Your Dodge Neon SRT‑4: Step‑by‑Step Performance Upgrade

Upgrading the turbocharger on a Dodge Neon SRT‑4 is one of the most effective ways to unlock serious horsepower. The Garrett T28 turbo offers proven reliability, better spool characteristics, and significantly higher flow capacity compared to the factory Mitsubishi TD05HR unit. While a bolt-on T28 kit can deliver gains of 50–80 wheel horsepower with proper tuning, the installation requires careful attention to oil lines, intercooler plumbing, and boost control. This guide walks you through the entire process — from tools and preparation to final testing — ensuring your SRT‑4 gets a safe, repeatable power increase.

Tools and Materials Needed

Having the right tools and parts on hand before you start will save hours of frustration. Below is a complete list organized by category.

Hardware & Turbo Components

  • Garrett T28 turbo kit (includes turbocharger, mounting bracket, and hardware; ensure it’s designed for the SRT‑4)
  • New manifold gaskets (turbo‑to‑manifold and manifold‑to‑head)
  • Oil feed line (braided stainless or PTFE, with proper fittings for the T28)
  • Oil drain line (with gasket and bolts for the oil pan return)
  • Silicone hoses (for intercooler and charge pipes; size matched to your kit)
  • Intercooler (if upgrading; many T28 kits include a larger front‑mount core)
  • Boost gauge (mechanical or electronic)
  • Vacuum lines (silicone, 3–4 mm ID for boost reference)
  • Heat shield (to protect nearby components from radiant heat)
  • New copper or aluminum crush washers (for oil line connections)

Tool List

  • Socket set (metric, 1/4″ and 3/8″ drive, extensions, universal joint)
  • Combination wrenches (10 mm, 12 mm, 13 mm, 14 mm, 17 mm)
  • Torque wrench (range 10–80 ft‑lb)
  • Flathead and Phillips screwdrivers
  • Pry bar (for stubborn heat shields)
  • Oil drain pan
  • Jack and jack stands (or ramps)
  • Safety glasses and gloves
  • Shop rags and brake cleaner

Preparation: Getting the SRT‑4 Ready

A clean, organized workspace and proper vehicle preparation are essential for a smooth turbo swap. Follow these steps before you touch a single bolt.

  1. Disconnect the battery – Remove the negative terminal and set it aside wrapped in a rag. This prevents accidental short circuits and resets the ECU for adaptation after the install.
  2. Remove the engine cover – The factory plastic cover simply pulls up. This gives you access to the turbo area and the oil fill cap.
  3. Drain the engine oil – Warm the engine slightly (if not already warm) to thin the oil, then drain it into a clean container. You will need to remove the oil pan for the drain line later, so draining now prevents a mess.
  4. Remove the factory turbocharger (if equipped) – Disconnect the oxygen sensor, oil lines, coolant lines (if applicable), and the four manifold nuts. The factory turbo can be heavy; support it while removing the last nut. See this SRT‑4 forum guide for detailed OEM removal steps.
  5. Inspect the manifold – Check for cracks at the collector and around the wastegate port. Replace the manifold gasket with a high‑quality multi‑layer steel unit. Any warpage should be corrected by a machine shop.

Pro tip: While the turbo is off, consider replacing the exhaust manifold studs and nuts with stainless steel hardware to avoid future corrosion and seized fasteners.

Installing the Garrett T28 Turbocharger

With the engine bay prepped, you can begin the actual T28 installation. Work slowly and double‑check each connection.

1. Mounting the Turbo

Position the T28 onto the exhaust manifold studs. The oil inlet on the T28 typically faces upward (or slightly angled) to accept the feed line. Make sure the compressor housing outlet aligns naturally with your intercooler piping route.

  • Install the new manifold gasket onto the studs.
  • Slide the turbo onto the studs and hand‑tighten the four T‑bolt nuts or brass locknuts (supplied with the kit).
  • Torque to 40 ft‑lb (check your kit’s specification; never guess).
  • Attach the bracket (if included) to the side of the turbo and to a solid engine block boss to reduce vibration.

External reference: Garrett’s official T28 installation manual (available at Garrett Motion Knowledgebase) provides bolt torque values and oil line recommendations for all T‑series turbos.

2. Connecting the Oil Lines

Proper oil supply and drain are critical to turbo longevity. The T28 uses a journal bearing design that needs a steady oil supply but cannot tolerate excessive drain back pressure.

  • Oil feed: Attach the oil feed line to the turbo inlet (typically 1/8″ NPT). Use the supplied banjo bolt and copper washers. Route the line to the factory oil pressure sender port or a sandwich plate. Do not use Teflon tape on NPT threads – it can shred and block the oil passage. Instead, use a small amount of high‑temperature thread sealant.
  • Oil drain: Connect the oil drain line to the turbo’s drain flange (usually a -10 or -12 AN male fitting). Run the line to the oil pan’s drain return bung. Ensure the drain line has a continuous downward slope with no low spots. If you removed the oil pan, weld or bolt the provided -10 AN bung into the pan above the oil level.

Warning: Never restrict the oil drain line. A kinked or undersized drain will cause seal failure and turbo damage within minutes. Use only silicone or wire‑reinforced hose rated for high heat.

3. Intercooler Installation

The T28’s increased airflow demands a larger intercooler core. Most T28 kits for the SRT‑4 include a 3″ core front‑mount intercooler (FMIC).

  • Remove the factory sidemount intercooler and its plumbing (if still installed).
  • Mount the new FMIC to the front lower radiator support using the brackets provided. Ensure it is centered and level.
  • Run the hot side charge pipe from the compressor outlet to the passenger‑side intercooler end tank. Use silicone couplers and T‑bolt clamps (tighten to 60 in‑lb).
  • Run the cold side pipe from the driver‑side end tank to the throttle body. Trim the pipe if necessary for a clean fit.

Performance note: For best results, keep all charge pipe lengths as short and straight as possible. Avoid 90° bends that restrict flow. More info on intercooler sizing can be found in Engine Basics’ intercooler guide.

4. Boost Gauge Setup

A boost gauge is not optional when installing a larger turbo. You need real‑time pressure data to avoid detonation and over‑boost.

  • Mount the gauge in a pod on the A‑pillar or in a dash vent. Secure the gauge harness and vacuum line out of the way of moving parts.
  • Tap a vacuum source: Remove the small rubber cap on the intake manifold (near the throttle body) and install a 1/8″ NPT hose barb fitting. Connect a silicone vacuum line from this source to the gauge.
  • For an electronic boost gauge, follow the manufacturer’s wiring instructions (typically power, ground, and signal).

Calibration tip: Before starting the engine, verify the gauge reads 0 psi with the engine off and key on. After startup, you should see 18–22 in‑Hg at idle.

5. Final Connections & Reassembly

Now reconnect everything that was disconnected.

  • Attach the wastegate actuator arm to the T28’s internal wastegate lever. Adjust the arm length so it barely holds the flapper closed – typically about 2 threads of preload.
  • Reconnect all vacuum lines: from the compressor housing boost reference to the wastegate actuator, from the intake manifold to the blow‑off valve (if equipped), and any PCV or EVAP lines.
  • Plug in the oxygen sensor, coil packs, and any electrical connectors near the turbo area.
  • Install the heat shield over the turbine housing. Use new fasteners if the old ones are corroded.
  • Reinstall the engine cover (optional, but helps clean appearance).
  • Refill the engine with 5W‑30 synthetic oil to the proper level. Use a high‑quality oil that meets API SN or higher.

Testing the Installation

Before you take the SRT‑4 out for a joyride, perform a systematic check to catch any issues.

Pre‑Start Checks

  • Verify all oil line fittings are tight, the drain hose is secure, and there’s no debris in the charge pipes.
  • Double‑check that the intercooler is not contacting the radiator or fans.
  • Ensure the wastegate actuator rod is clipped in and moves freely.

First Start & Pressure Test

  1. Reconnect the battery and turn the key to the ON position (engine off). Listen for the fuel pump priming. Check for any loose electrical connections.
  2. Start the engine. The turbo will receive oil immediately – listen for any abnormal whining or scraping. Let it idle for 2 minutes to circulate oil through the turbo bearings.
  3. Inspect for oil leaks at the turbo’s feed and drain connections, as well as the oil pan bung. Also check charge pipe couplers and vacuum lines for any air leaks using soapy water or a handheld smoke tester.
  4. Rev the engine gently to 2000 RPM and watch the boost gauge. You should see slight positive pressure (0 psi) – if you see vacuum, the gauge is working correctly. If the gauge reads 0 psi at idle but doesn’t move, check the vacuum source.

Test Drive Procedure

  • Take the car on a quiet road. First, drive gently for 5 minutes to let all components heat‑cycle. Listen for exhaust leaks at the manifold‑to‑turbo joint.
  • Perform a single third‑gear pull from 2500 RPM to redline. Monitor boost pressure – a healthy T28 setup should reach 15–18 psi (depending on wastegate spring and tuning). If boost spikes above 20 psi, lift off immediately; you may need to adjust the wastegate arm or get a custom tune.
  • After the pull, idle for 30 seconds and then shut off. Remove the oil fill cap and look for smoke or excessive crankcase pressure. A small amount is normal, but heavy vapor indicates blow‑by or restrictive drain.

External resource: For troubleshooting boost issues, check Garrett’s boost control diagnostic page.

Tips for a Successful Installation

  • Always use new gaskets – reuse of old gaskets is the number one cause of exhaust and oil leaks post‑install.
  • Clean all mating surfaces thoroughly before assembly; a razor blade and brake cleaner work well.
  • Upgrade the fuel system – the T28 can push the stock injectors past their duty cycle. A 255 LPH fuel pump and 750 cc injectors are recommended for any boost over 15 psi. Pair with a conservative tune.
  • Do not skip the tune. A larger turbo without proper calibration can cause detonation that damages the engine. Use a reputable tuner with SRT‑4 experience or a quality flash tune (e.g., DiabloSport or HPTuners).
  • Check your cooling system – a bigger turbo adds heat to the engine bay. Consider a larger radiator or an oil cooler if you plan to track the car.
  • Heatsink the turbo – wrapping the downpipe and turbine housing with titanium wrap lowers under‑hood temperatures and preserves intake air density.

Conclusion

Installing a Garrett T28 turbocharger on your Dodge Neon SRT‑4 is a rewarding upgrade that transforms the car’s power delivery and peak output. By following this step‑by‑step guide, using quality parts, and verifying every connection, you will have a reliable, high‑performance SRT‑4 that pulls hard from 3000 RPM to redline. Remember: proper oil line routing, boost gauge monitoring, and a professional tune are non‑negotiable for long‑term durability. Enjoy the extra boost and the grin it puts on your face, but always respect the increased power — the SRT‑4 chassis can be demanding when you’re not paying attention.