- Thread starter
- #26
BoostedBeaver
Moderator
- 951
- 265
- Aug 15, 2009
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Augusta,
Georgia
Well I have been busy lately, but I am going to try and get this thread caught up. Here we go.
So now you have your clean parts and you are ready to put things back together.
I had the compressor, turbine, compressor cover, and a few other items media blasted. The CHRA was thoroughly cleaned to insure a spotless assembly.
Start by getting some thick fluid to use for the assembly. You want it to be thick enough to stick and stay. I used some left over red line gear oil for my assembly.
Flip the CHRA to the compressor side and install the new lower snap ring. Once you have this installed, coat the journal and new bearing with your fluid of choice. Insert the journal bearing and install the new upper snap ring. Flip and repeat to the turbine side.
Next up is the Turbine shaft. To polish the shaft, you need to wrap tape around the end that the compressor wheel would slide onto. Lock this end into a drill. Get a green scotch bright pad and while applying power to the drill, use the pad to polish out all the discoloration.
The pictures start to get a little slim here as I must have run out of batteries.
You will need to put the turbine oil seal on. This may be a little tricky, but just take your time to insure that you do not break the seal. Also be sure that you install the heat shield before installing the turbine shaft.
When pushing in the turbine shaft, you will hit a stopping point. A little tap will cause the turbine seal to seat in place. Now flip the CHRA over to start installing the other hardware.
Next the thrust collar goes into place. The thrust collar is the small round piece in this picture.
Next you need to install your new thrust bearing from your kit. This is a picture of the old one for reference.
The new thrust washer can be seen centered at the bottom of this picture.
Next you will put together a series of parts. You will need to place the oil seal on the oil slinger. Then you will insert the oil slinger and seal into the oil seal plate. Lastly, you will insert the new oil baffle from your rebuild kit. The new oil seal will come from your rebuild kit. The oil seal plate is on the far left of this picture and the oil slinger can be seen as the small round piece.
After this is assembled, you will need to place the proper o-ring from your rebuild kit into the CHRA. Place a slight amount of lube on the o-ring to help it slip in place. This next picture is of dis-assembly, but it gives you a good reference.
Now place the oil seal unit into the CHRA with the baffle facing downward. Keep in mind that the baffle will only fit one way, so dont force it. Once you get the oil seal unit down, insert your new snap ring provided in your rebuild kit. This will seat and seal the o-ring that you put in place.
This picture is for reference.
Now that you have the all that in place, place the compressor wheel onto the turbine shaft and align your matting marks. You may use the new nut provided in the rebuild kit and start to tighten it down. Remember that the threads for the compressor wheel are left hand (Reverse) threads. Once the bolt is started, you will need to get it snug. Use a box end wrench to hold the turbine wheel while snugging up the nut. Now make sure that your marks are still lined up and torque the nut to 14 ft lbs (6 point nut) 15 ft lbs (12 point nut).
You will now need to install your compressor cover. If you have not drilled and tapped it for a 1/8 inch NPT boost source, now is a great time to do that to your compressor cover. The compressor cover on Holset HX series turbos is a known boost leak. Once you get your compressor cover clocked to fit your application, be sure to add a bead of RTV to seal the compressor cover and prevent boost leaks. Do not do this before you get the clocking right. It will be difficult to separate the compressor cover after the RTV dries. Good luck with the next task of installing the massive snap ring. Be sure to wear eye protection and gloves as this ring retains a lot of force. I cannot remember for the life of me how I got mine installed, but it took a lot of time and a ton of patience.
At this point you will need to choose and install your choice of turbine housing.
Once this is complete, you have a rebuilt Holset. The Holset service manuals can be found in the link below, and I encourage you to download the FREE manual in you plan to tackle this job.
www.cummins.com/turbos - Service Repair Manuals
Hope this helps, and please use the RATE button. All comments and/or suggestions are welcome.
So now you have your clean parts and you are ready to put things back together.
I had the compressor, turbine, compressor cover, and a few other items media blasted. The CHRA was thoroughly cleaned to insure a spotless assembly.
Start by getting some thick fluid to use for the assembly. You want it to be thick enough to stick and stay. I used some left over red line gear oil for my assembly.
Flip the CHRA to the compressor side and install the new lower snap ring. Once you have this installed, coat the journal and new bearing with your fluid of choice. Insert the journal bearing and install the new upper snap ring. Flip and repeat to the turbine side.
Next up is the Turbine shaft. To polish the shaft, you need to wrap tape around the end that the compressor wheel would slide onto. Lock this end into a drill. Get a green scotch bright pad and while applying power to the drill, use the pad to polish out all the discoloration.
The pictures start to get a little slim here as I must have run out of batteries.
You will need to put the turbine oil seal on. This may be a little tricky, but just take your time to insure that you do not break the seal. Also be sure that you install the heat shield before installing the turbine shaft.
When pushing in the turbine shaft, you will hit a stopping point. A little tap will cause the turbine seal to seat in place. Now flip the CHRA over to start installing the other hardware.
Next the thrust collar goes into place. The thrust collar is the small round piece in this picture.
Next you need to install your new thrust bearing from your kit. This is a picture of the old one for reference.
The new thrust washer can be seen centered at the bottom of this picture.
Next you will put together a series of parts. You will need to place the oil seal on the oil slinger. Then you will insert the oil slinger and seal into the oil seal plate. Lastly, you will insert the new oil baffle from your rebuild kit. The new oil seal will come from your rebuild kit. The oil seal plate is on the far left of this picture and the oil slinger can be seen as the small round piece.
After this is assembled, you will need to place the proper o-ring from your rebuild kit into the CHRA. Place a slight amount of lube on the o-ring to help it slip in place. This next picture is of dis-assembly, but it gives you a good reference.
Now place the oil seal unit into the CHRA with the baffle facing downward. Keep in mind that the baffle will only fit one way, so dont force it. Once you get the oil seal unit down, insert your new snap ring provided in your rebuild kit. This will seat and seal the o-ring that you put in place.
This picture is for reference.
Now that you have the all that in place, place the compressor wheel onto the turbine shaft and align your matting marks. You may use the new nut provided in the rebuild kit and start to tighten it down. Remember that the threads for the compressor wheel are left hand (Reverse) threads. Once the bolt is started, you will need to get it snug. Use a box end wrench to hold the turbine wheel while snugging up the nut. Now make sure that your marks are still lined up and torque the nut to 14 ft lbs (6 point nut) 15 ft lbs (12 point nut).
You will now need to install your compressor cover. If you have not drilled and tapped it for a 1/8 inch NPT boost source, now is a great time to do that to your compressor cover. The compressor cover on Holset HX series turbos is a known boost leak. Once you get your compressor cover clocked to fit your application, be sure to add a bead of RTV to seal the compressor cover and prevent boost leaks. Do not do this before you get the clocking right. It will be difficult to separate the compressor cover after the RTV dries. Good luck with the next task of installing the massive snap ring. Be sure to wear eye protection and gloves as this ring retains a lot of force. I cannot remember for the life of me how I got mine installed, but it took a lot of time and a ton of patience.
At this point you will need to choose and install your choice of turbine housing.
Once this is complete, you have a rebuilt Holset. The Holset service manuals can be found in the link below, and I encourage you to download the FREE manual in you plan to tackle this job.
www.cummins.com/turbos - Service Repair Manuals
Hope this helps, and please use the RATE button. All comments and/or suggestions are welcome.