Hey if anyone wants a full rebuild manual for any holset turbo you can get it at www.holset.uk just google holset and it pops up as the first one it has all the manuals from breakdown to build back up in PDF files I have downloaded and printed out 3 of them now and they do a wonderful job
Don't know if this really adds anything to the thread, but just did an HTT Turbo upgrade. I swapped compressor housing and compressor impeller. The new impeller [dang work of art] had two little sorta half moon places machined out of it, right side by side on the outside rim. It was balanced from the factory. Don't know if all Holset replacement impellers are balanced but seems likely to me, just to lower their corporate liability?
wondering if anyone has been able to download the service data sheet that has the torque rating for end nuts and such for this turbo at the holset site. I get the rest of the manual but that part is missing.