Rebuilding the CT26

 

Introduction 

 

  In ordinary situations, the owner of a car does not rebuild his own turbo.  However some have noticed that just a short time after

having their CT26 rebuilt or upgraded, the seals have blown and oil is leaking.  It is not necessary to do a full rebuild in this case, so a 

simple seal replacement is in order.  Doing this step is easier than you might think.  A complete rebuild can be done in some situations

however, a really bad turbo must be upgraded by a professional.  With this in mind, here is somewhat of a guide for you when attempting

this procedure.

Before we begin, take a second to familiarize yourself with CT26 and it's parts.  There are 3 main parts:

  • Compressor Housing

  • CHRA

  • Exhaust Housing

  While the first and last are obvious, the CHRA is basically everything inside.  From the compressor wheel, to the turbine on the exhaust side,

and the bearings seals and actual center section.  The bearings in the CT26 are of a floating type.  Which means they "float" in a coat of

oil.  That's why with this turbo, it's very important to always run clean oil and follow proper cool down procedures.

  Here's a layout of the supra CT26  (courtesy CJsupra).  If you were to buy a CHRA (pictured) it comes rebuilt and assembled.  The exhaust, compressor

housings have been ceramic coated, as well as the turbo elbow.  There is a bag of new bolts from Toyota (recommended), and in the bottom right is

the clamp that holds the CHRA to the exhaust housing.

 

Journey into the unknown...

 

  One thing to keep in mind is that the turbocharger requires a precision balance since it spins in excess of 100,00 RPM.  If you do something to upset

this balance, you can have a new hole in your turbo where the compressor used to be.  Please be careful.  Please do not hold us responsible.  For the

most part replacing just the seals is no problem.  Attempting to repair a turbo with excessive play is very hard to do properly.

 

Disassembly

  1. Remove Turbo Clamp covering center section (2x12mm Bolts)

  2. Heat the connection between center section and exhaust housing (Hair dryer)

  3. Knock exhaust housing free using mallot, or drive a piece of wood in between to wedge the pieces apart

  4. Examine exhaust housing for cracks, replace if necessary

  5. Use some large needle nose pliers or something similar to undo the large C-clip holding on the compressor housing

  6. Remove the compressor housing seal using a small pick

  7. Mark the position of the compressor wheel to the mounting nut and turbo shaft. Must be re-installed in the same position.

  8. Place turbine side in workbench vice upright, remove turbo nut.   (10mm if previously rebuilt, otherwise SST for toyota nut, or vice grips)

  9. Remove compressor

  10. Needle nose pliers again to remove small C-clip

  11. Remove top bearing (may require vice grips to pull up)

  12. Remove inner oil seal

  13. Remove washer

  14. Remove bearing

  15. Remove center section from turbine

  16. Clean and examine turbine

  17. If the inside of the center section is scored, it must be re-bored by professional

  18. Assemble in reverse order, coat parts with fresh oil

  19. If you removed Toyota compressor nut, replace with new

 

Parts Source

 

USA:

ADP @ 1800-225-3596...ask for Darell

$107.75

 

Canada:

Bramall Turbo Supply Ltd.
bramall@bramall-turbo.com
119 Spy Court
Markham,Ontario
Canada. L3R 5H6
Toll Free: 1 (800) 567-7559
Phone: (905) 477-7559 Fax: (905) 470-0618

CT26 Repair Kit PN# CT2003
PRICE: ???