Skip to main content

R1.01

Major VersionM

Approved 27WON Install Instructions

by Rich Harris

Introduction

In this installation guide we have provided step by step instructions to remove your old CHRA and replace it with a new 27WON CHRA

  1. First and foremost; THANK YOU for becoming a part of the 27WON Family.  We hope to REDEFINE your experience of the aftermarket with the highest level Parts, Customer Service, Packaging, & Support
    • First and foremost; THANK YOU for becoming a part of the 27WON Family. We hope to REDEFINE your experience of the aftermarket with the highest level Parts, Customer Service, Packaging, & Support

    • These instructions are for both a W1 and W2 turbochargers. The photographs are mostly of a W1 turbocharger. Photos of a W2 are provided when necessary for clarity

    • These instructions do not cover removal and reinstallation of the turbocharger

  2. Ensure you have a clean work surface or lay down a clean cover to ensure nothing can make its way into your turbocharger
    • Ensure you have a clean work surface or lay down a clean cover to ensure nothing can make its way into your turbocharger

    • Set out your turbocharger on a workbench as shown

    • Turbine Housing

    • CHRA

    • Compressor COver

  3. Using a 10mm socket remove the nut (red circle) holding the V-band clamp Remove the clamp
    • Using a 10mm socket remove the nut (red circle) holding the V-band clamp

    • Remove the clamp

    • The clamp should easily come off of the turbo once the nut is removed

  4. Carefully pull the CHRA straight out of the turbine housing There is a locating pin between the CHRA and turbine housing
    • Carefully pull the CHRA straight out of the turbine housing

    • There is a locating pin between the CHRA and turbine housing

    • The turbocharger may be stuck to the turbine housing. In this case you can tap the turbine housing lightly with a rubber mallet to break it loose

  5. Snap Ring Snap Ring Pliers Use snap ring pliers to compress and lift the snap ring out of the groove in the compressor cover
    • Snap Ring

    • Snap Ring Pliers

    • Use snap ring pliers to compress and lift the snap ring out of the groove in the compressor cover

    • Once the snap ring is free lift it straight up and remove it from the CHRA

    • You may need to rotate the snap ring around the CHRA to remove it more easily

    • If you do not have snap ring pliers, needle nose pliers will work but they are not recommended

  6. Remove CHRA The CHRA should now easily come straight out of the compressor cover Sometimes the O-ring around the CHRA will stick a little. In this case wiggle the CHRA side to side while holding the compressor cover down being careful to not hit the inside of the cover with the compressor blades
    • Remove CHRA

    • The CHRA should now easily come straight out of the compressor cover

    • Sometimes the O-ring around the CHRA will stick a little. In this case wiggle the CHRA side to side while holding the compressor cover down being careful to not hit the inside of the cover with the compressor blades

  7. When failure occurs in a turbocharger there is a chance the blades will make contact with the inside of the compressor cover Small scratches or dings are fairly normal on used OEM and aftermarket housings and are not a point of concern
    • When failure occurs in a turbocharger there is a chance the blades will make contact with the inside of the compressor cover

    • Small scratches or dings are fairly normal on used OEM and aftermarket housings and are not a point of concern

    • Visually inspect and feel the inside of the compressor cover to ensure there is no metal sticking up that could make contact with your new blades

    • If you feel any burrs these can be knocked down with a lighter grit sandpaper such as 500 or 600 grit

    • Be sure to clean your compressor cover, especially after sanding

    • Do not need to remove much material, just enough to knock down any burrs

  8. Visually inspect the inside of the Turbine housing Some small cracks in the turbine housing are not uncommon on OE and aftermarket turbos.  Normally, this is not a performance issue
    • Visually inspect the inside of the Turbine housing

    • Some small cracks in the turbine housing are not uncommon on OE and aftermarket turbos. Normally, this is not a performance issue

    • This is a good example of a small crack that wouldn't cause concern

    • If you notice anything concerning with your turbine housing then give us a call at 571-271-0271

    • The Turbine housing is far less likely to have suffered damage as it is made of steel rather than aluminum. This makes it much more laborious to repair

  9. Prime the o-ring on the CHRA by dipping your finger in fresh engine oil and spreading a thin layer around the outide of the o-ring
    • Prime the o-ring on the CHRA by dipping your finger in fresh engine oil and spreading a thin layer around the outide of the o-ring

  10. Set the CHRA into the compressor cover ensuring the pin on the cover and the hole on the CHRA align This is the only diference between a W1 and W2 CHRA installation, note the larger pin on the cover, and the divot on the CHRA Using both hands press the CHRA into the cover. Ensure this goes in straight
    • Set the CHRA into the compressor cover ensuring the pin on the cover and the hole on the CHRA align

    • This is the only diference between a W1 and W2 CHRA installation, note the larger pin on the cover, and the divot on the CHRA

    • Using both hands press the CHRA into the cover. Ensure this goes in straight

    • You should be able to feel the CHRA seat into the Compressor cover

    • DO NOT press down on the turbine wheel itself, hold the CHRA by the body as shown

    • Make sure the compressor wheel goes in straight to ensure no contact is made with the Compressor cover

  11. While holding the CHRA in the seated position compress the snap ring and set it into the groove in the compressor cover Press the two end tabs into the groove with a flathead screw driver Check the snap ring all the way around the CHRA to be sure it is seated correctly as shown
    • While holding the CHRA in the seated position compress the snap ring and set it into the groove in the compressor cover

    • Press the two end tabs into the groove with a flathead screw driver

    • Check the snap ring all the way around the CHRA to be sure it is seated correctly as shown

    • If you are unsure if the snap ring is seated correctly use your flat head screwdriver to press the snap ring down around the entire CHRA

  12. Ensure the pin on the turbine housing and the hole on the CHRA align when you press them together Insert the CHRA into the turbine housing Be sure the turbine blades go into the housing straight and do not make contact with the housing
    • Ensure the pin on the turbine housing and the hole on the CHRA align when you press them together

    • Insert the CHRA into the turbine housing

    • Be sure the turbine blades go into the housing straight and do not make contact with the housing

  13. Wrap the V-band clamp  around the CHRA and the turbine housing ensuring both flanges are caught by the clamp Push on both sides of the turbo to push the two flanges together Thread the 10mm nut onto the bolt then torque to 6 FT/LBS or 62 IN/LBS
    • Wrap the V-band clamp around the CHRA and the turbine housing ensuring both flanges are caught by the clamp

    • Push on both sides of the turbo to push the two flanges together

    • Thread the 10mm nut onto the bolt then torque to 6 FT/LBS or 62 IN/LBS

    • The reassembled turbo should appear as shown

  14. We do recommend blowing your turbocharger out with compressed air after assembly to ensure there is no foreign objects in the housings that could cause trouble down the line
  15. This completes the installation of your 27WON W1/W2 CHRA
    • This completes the installation of your 27WON W1/W2 CHRA

    • We hope you were impressed with your 27WON experience and love your new CHRA for years to come. Email us at sales@27won.com or call us at 571-271-0271 with any questions or concerns

Finish Line

Jacob miller-self

Member since: 04/25/2022

445 Reputation

2 Guides authored

Team

Builds Team Member of Builds Team

6 Members

14 Guides authored

0 Comments

Add Comment

View Statistics:

Past 24 Hours: 0

Past 7 Days: 3

Past 30 Days: 8

All Time: 108