Unlock Serious Horsepower: Installing the AFE Power Jeep Wrangler Turbo Kit

If you own a Jeep Wrangler and crave more power—whether for rock crawling, daily driving, or highway passing—the AFE Power turbo kit is one of the most effective bolt-on upgrades available. Designed specifically for late-model Jeep Wranglers, this kit delivers significant horsepower and torque gains while maintaining reliability when installed correctly. This guide provides a thorough, step-by-step walkthrough of the installation process, covering everything from tool preparation to post-installation tuning. By the end, you will have the knowledge to complete the job in your own garage with confidence.

Tools and Materials You Will Need

Before beginning, gather all necessary tools and supplies. Having everything on hand saves time and prevents frustration. The AFE Power kit includes most hardware, but you will need the following:

  • AFE Power Jeep Wrangler Turbo Kit (confirm compatibility with your model year and engine)
  • Socket set with metric and SAE sizes (3/8” and 1/2” drive recommended)
  • Wrench set (combination wrenches, ratcheting wrenches helpful for tight spaces)
  • Torque wrench (ft-lb and in-lb ranges)
  • Allen keys / hex bits (for clamps and sensors)
  • Pry bar and pick set (for hoses and clips)
  • Thread locker (Loctite 242 or equivalent for critical fasteners)
  • Anti-seize compound (for exhaust bolts)
  • Oil catch can (recommended to keep intake tract clean)
  • New engine oil and filter (the installation requires draining and refilling oil)
  • Coolant (if your kit uses water-cooled turbo, you may need to top off or drain some)
  • Shop towels, drain pan, funnel, safety glasses, and mechanic gloves

Preparation: Setting Up for Success

Proper preparation prevents mistakes and ensures a smooth installation. Follow these initial steps:

  1. Park the vehicle on a level surface and engage the parking brake. Place wheel chocks behind the rear tires.
  2. Disconnect the battery (both negative and positive terminals) to avoid short circuits or accidental airbag deployment. Wait a few minutes for the ECU to power down.
  3. Drain the engine oil and remove the oil filter. The turbo kit requires oil supply and return connections; starting with fresh oil is ideal.
  4. Drain or siphon coolant if your turbo is water-cooled. Lower the level below the thermostat housing to minimize spillage when disconnecting coolant lines.
  5. Remove any under-engine covers or skid plates that obstruct access. Also remove the front grille or shroud if necessary for intercooler piping clearance.
  6. Read the entire AFE Power instruction manual that comes with the kit. Familiarize yourself with the components, torque values, and routing diagrams.

Step 1: Removing the Stock Components

With preparation complete, it is time to remove the factory intake, exhaust manifold, and any existing turbocharger (if your Jeep came with one). The following steps apply to a naturally aspirated 3.6L Pentastar engine; modifications may be needed for other configurations.

Remove the Factory Air Intake System

  • Loosen the clamps on the intake tube and air box.
  • Disconnect the mass airflow (MAF) sensor and any intake temperature sensors.
  • Unclip the air box from its mounting points and remove the entire assembly. Set aside for later reinstallation or replacement with the kit’s intake.

Remove the Exhaust Manifold

  • Unbolt the exhaust manifold from the cylinder head. The 3.6L manifold uses 12-14 bolts; use a penetrating oil if they are stubborn.
  • Lift the manifold out from the top or bottom depending on clearance. On some Wrangler models, removing the driver-side inner fender liner helps.
  • Inspect the exhaust manifold gasket; replace it if damaged.
  • Remove the oxygen (O2) sensors from the exhaust manifold using an O2 sensor socket. Do not damage the wiring.
  • Disconnect the coolant hoses that will interfere with the new turbo. Plug them temporarily to prevent leaks.
  • If your Wrangler has a factory turbo (e.g., 2.0L models), unbolt and remove the stock turbo, oil lines, and water lines following manufacturer instructions.

Pro tip: Bag and label all bolts, sensors, and brackets as you remove them. This will save time during reassembly.

Step 2: Installing the AFE Power Turbo Kit

Now the real fun begins. The AFE Power kit is engineered for a relatively straightforward installation, but patience is key. Work systematically from the bottom up.

Mount the Turbocharger and Exhaust Manifold

  • Place the new exhaust manifold (often integrated into the turbo housing or supplied as a separate piece) onto the cylinder head studs. Use new gaskets supplied in the kit.
  • Tighten the manifold bolts in a crisscross pattern to the torque specified in the AFE manual (typically 18–22 ft-lb). Use thread locker on the bolts to prevent loosening from vibration.
  • Position the turbocharger onto the manifold. Secure it with the provided bolts and lock washers. Ensure the oil drain port faces downward.
  • Install the wastegate actuator and linkage. Adjust the actuator rod length per the instructions to achieve proper boost control.

Connect Oil Supply and Drain Lines

  • Install the oil supply line from the engine block (usually near the oil filter adapter) to the top port of the turbo. Use the appropriate banjo bolt and copper washers.
  • Attach the oil drain line from the bottom of the turbo to the oil pan. The kit may include a new drain port that requires drilling and tapping the pan, or a sandwich plate adapter. Follow the provided instructions carefully to avoid leaks.
  • Tighten all fittings to the specified torque—over-tightening can crack the turbo housing.

Coolant Lines (if applicable)

  • Connect the water-cooled turbo lines to the engine coolant system. Typical routing goes from the thermostat housing or heater core return to the turbo, then back to the radiator or water pump.
  • Use hose clamps to secure rubber sections, but avoid crushing the fittings. Refill coolant after installation.

Install the Air Intake and Intercooler System

  • Mount the intercooler (provided with most AFE kits) behind the front grille or in front of the radiator. Use the supplied brackets and ensure it does not block airflow excessively.
  • Run the charge pipes from the turbo outlet to the intercooler, and then from the intercooler to the throttle body. Silicone couplers and T-bolt clamps are typical—tighten them evenly.
  • Install the new air intake tube with the MAF sensor. Some kits reuse the factory air box; others provide a high-flow cone filter and heat shield. Ensure all sensors are connected and the filter is securely clamped.

Finalize Turbo-Side Plumbing

  • Connect the blow-off valve or recirculation valve if included. Route the vacuum line to a boost source (often the intake manifold).
  • Secure all wiring harnesses away from heat sources. Tie-wrap loose cables to the chassis or engine harness.
  • Double-check that all clamps, bolts, and fittings are tight. Re-torque critical fasteners per the manual.

Step 3: Reconnecting, Filling Fluids, and Initial Start-Up

With the turbo kit mechanically installed, it is time to bring the system to life.

  1. Reconnect the battery. Tighten terminals and apply a small amount of dielectric grease to prevent corrosion.
  2. Refill engine oil with the manufacturer-recommended viscosity (often 5W-30 full synthetic). Install a new oil filter. Prime the turbo by disconnecting the coil packs and cranking the engine for 10–15 seconds without starting; this circulates oil before the turbo spins.
  3. Refill coolant if any was drained. Use a 50/50 mix of distilled water and coolant. Bleed air from the system by running the engine with the radiator cap off until the thermostat opens and bubbles subside.
  4. Inspect for leaks. Check oil supply and drain, coolant lines, intake boots, and exhaust connections. Tighten any leaks before proceeding.
  5. Start the engine. Allow it to idle for a few minutes while monitoring for unusual noises, smoke, or warning lights. Listen for turbo spool and wastegate operation—some noise is normal.
  6. Check boost pressure if your vehicle has a boost gauge. AFE kits typically run 4–6 psi on a safe tune. If boosting higher than expected, verify wastegate function.

Tuning and ECU Considerations

The AFE Power turbo kit is designed to work with a custom engine tune. Running a turbocharged engine without recalibrating the ECU can cause lean air/fuel ratios, detonation, and engine damage. You have several options:

  • Use AFE’s own ECUtuners or a handheld tuner (many kits come with a flash tool and pre-loaded calibration).
  • Work with a reputable remote tuner who can adjust fuel, timing, and boost tables based on your vehicle’s data logs.
  • Consider a boost controller if you plan to adjust boost levels. A manual boost controller is simple; an electronic one offers more precision.
  • Upgrade the fuel system if you push beyond 6–8 psi. Larger injectors and a higher-flow fuel pump may be necessary.

External resource: Learn more about tuning forced induction Jeeps at Jeep Forum. For professional tuning services, Flyin’ Miata offers remote tuning for many platforms (though they specialize in Mazdas, the concept applies).

Post-Installation Maintenance and Tips

To keep your AFE Power turbo kit running reliably for years, follow these maintenance guidelines:

  • Change engine oil and filter every 3,000–5,000 miles (turbocharged engines generate more heat and stress on oil). Use high-quality synthetic oil with a robust additive package.
  • Inspect all hoses and clamps monthly for leaks, cracks, or looseness. Silicone hoses can degrade over time; replace if swollen or brittle.
  • Check turbocharger shaft play by removing the intake pipe and gently pushing the compressor wheel. Minimal axial play is normal; radial play indicates wear.
  • Monitor engine vitals with a scan tool – watch for knock retard, fuel trims, and coolant temperatures. If you see persistent knock, reduce boost or refine the tune.
  • Install a catch can to prevent oil vapor from entering the intake system. This keeps the intercooler and throttle body clean.
  • Plan for upgraded components as power goals increase – consider a larger intercooler, better intake, or exhaust downpipe for additional gains.

Frequently Asked Questions

Is the AFE Power turbo kit compatible with automatic and manual transmissions?

Yes, the kit fits both. However, automatic transmission coolers may require relocation or a larger auxiliary cooler if towing or off-roading frequently.

Do I need to upgrade the clutch?

If you have a manual transmission and drive aggressively, the stock clutch may slip with the extra torque. A heavy-duty clutch kit is recommended for sustained high boost.

What about the transmission cooling?

More power generates more heat. Consider an aftermarket transmission cooler, especially if you off-road in low range or tow a trailer.

How long does the installation take?

Expect 8–12 hours for an experienced DIY mechanic. First-timers should budget a full weekend. Enlist a helper for heavy lifting (the turbo and manifold are heavy).

Will the kit pass emissions?

AFE Power designs its kits to be CARB-compliant on some applications, but not all. Check your local laws. Retaining factory O2 sensors and catalytic converters helps. A tune may cause OBD readiness issues; consult your tuner.

Conclusion

Installing the AFE Power Jeep Wrangler turbo kit is a rewarding project that transforms the driving experience. With meticulous attention to detail, the right tools, and a proper tune, you can enjoy a significant power increase without compromising daily drivability. This guide has walked you through every major step—from removing stock components to post-installation maintenance. For official installation instructions, torque specs, and component diagrams, always refer to the AFE Power official website. Additionally, the JL Wrangler Forums are an invaluable resource for real-world tips and troubleshooting. Now, get your tools ready and enjoy the boost.