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
Before we begin, take a second to familiarize yourself with CT26 and it's parts. There are 3 main parts:
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.
Remove Turbo Clamp covering center section (2x12mm Bolts)
Knock exhaust housing free using mallot, or drive a piece of wood in between to wedge the pieces apart
Examine exhaust housing for cracks, replace if necessary
Mark the position of the compressor wheel to the mounting nut and turbo shaft. Must be re-installed in the same position.
Place turbine side in workbench vice upright, remove turbo nut. (10mm if previously rebuilt, otherwise SST for toyota nut, or vice grips)
Remove top bearing (may require vice grips to pull up)
Remove center section from turbine
If the inside of the center section is scored, it must be re-bored by professional
Assemble in reverse order, coat parts with fresh oil
If you removed Toyota compressor nut, replace with new
ADP @ 1800-225-3596...ask for Darell
Turbo Supply Ltd.
119 Spy Court
Canada. L3R 5H6
Toll Free: 1 (800) 567-7559
Phone: (905) 477-7559 Fax: (905) 470-0618
Repair Kit PN# CT2003