Step By Step Installation: Ported Housing Compressor Wheel

Step By Step Installation: Ported Housing Compressor Wheel

Sep 4th 2025

Full PDF Instructions can be downloaded here: https://www.riffraffdiesel.com/content/RESOURCES/Riffraff_Diesel_Ported_Housing_Instructions.pdf

Product Link: https://www.riffraffdiesel.com/riffraff-diesel-billet-compressor-wheel-ported-housing/

IMPORTANT: Before starting installation, please be sure that all items which were supplied with the kit are accounted for.

Required Parts:

  • Riffraff Diesel Billet Compressor Wheel - Ported Housing: Part# RDP-703697-0001
  • Garrett Compressor Housing O-ring: Part# GZ-14-010
  • Turbo Pedestal O-ring Kit: Part# GZ-9-003 

Recommended Tools:

  • Metric socket and wrench set
  • Common screwdrivers
  • Torque wrench

1. Remove the turbocharger using these instructions: 99.5-03 Turbo Charger R&R Instructions

2. Remove the Exhaust Back Pressure Valve (EBPV) from the turbine housing (7, 8mm bolts). 

3. Remove the wastegate E clip from the wastegate actuator rod end. 

4. Remove the two (2) nuts holding the wastegate actuator onto the compressor housing using a 10 mm socket.

5. Remove the five (5) compressor housing bolts using a 5/16” or 8 mm socket.

6. Remove the compressor housing from the turbo.

7. Using locking pliers, grab onto the turbine wheel hub securely to lock the turbo shaft to loosen the compressor wheel.

8. Using a 16mm wrench or socket loosen the compressor wheel by turning counter-clockwise. Remove the wheel from the shaft.

9. Thread the Anti-Surge Compressor wheel onto the shaft. Tighten it down to 50-65 in-lb. CAUTION: DO NOT OVER TIGHTEN THE COMPRESSOR WHEEL ONTO THE SHAFT! 

10. Reinstall the compressor housing. Use a new compressor housing o-ring (GZ-14-010). 

11. Install the five (5) bolts and tighten evenly in a star pattern to 12 ft-lb.

12. Install the EBPV onto the turbine housing and install the seven (7) bolts. Tighten to 30 ft-lb. We recommend high strength Loctite® thread locker on the bolts.

13. Reinstall the turbo using the instructions mentioned in Step 1.