71HTA Install Problem: Won't Slide Into Turbine Housing
#1
71HTA Install Problem: Won't Slide Into Turbine Housing
I'm working on installing a 71HTA and need some advice.
The factory CHRA slid out and goes back in without a problem but the 71HTA won't slide into the turbine housing. Looking at the two side by side it appears that the metal seal below the factory turbine wheel is tapered while the 71HTA is 90 degrees. It looks like that is what is keeping it from sliding in. I'm not using any force since the factory turbo doesn't need any force to put together and I don't want to damage the new turbo.
Does anyone have a 71HTA on hand that can compare it to my picture below for confirmation?
Thanks in advance for any advice!
The factory CHRA slid out and goes back in without a problem but the 71HTA won't slide into the turbine housing. Looking at the two side by side it appears that the metal seal below the factory turbine wheel is tapered while the 71HTA is 90 degrees. It looks like that is what is keeping it from sliding in. I'm not using any force since the factory turbo doesn't need any force to put together and I don't want to damage the new turbo.
Does anyone have a 71HTA on hand that can compare it to my picture below for confirmation?
Thanks in advance for any advice!
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Siege (Apr 28, 2018)
#5
Here's how far it will go in and I found some carbon on on the corner of the seal. It looks like the metal seal is too big for the turbo.
Last edited by Siege; Apr 28, 2018 at 02:24 PM.
#6
EvoM Community Team Leader
is that a 9.8 or 10.5 turbine housing?
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#8
EvoM Community Team Leader
easy way to tell, the 10.5 has a single hole in the wastegate flapper and the 9.8 has 2
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Siege (Apr 28, 2018)
#9
Found a thread with the different turbine housings compared here: https://www.evolutionm.net/forums/ev...m-turbine.html
It looks like it's a 10.5. Phew.
It looks like it's a 10.5. Phew.
#10
EvoM Community Team Leader
cool, at least thats one problem it isn't.
#13
Good idea. I just measured the circumference of the metal seal and it's 20cm for the factory turbo and 21cm on the 71HTA. I also measured the distance from the edge of the turbine blade to the lip of the seal.
Unfortunately I can't get a good picture from the other side since I hadn't planned on removing the O2 sensor housing.
Here are pictures of the blade measurements.
Unfortunately I can't get a good picture from the other side since I hadn't planned on removing the O2 sensor housing.
Here are pictures of the blade measurements.
Last edited by Siege; Apr 28, 2018 at 03:59 PM.
#14
Evolved Member
iTrader: (1)
Good idea. I just measured the diameter of the metal seal and it's 20cm for the factory turbo and 21cm on the 71HTA. I also measured the distance from the edge of the turbine blade to the lip of the seal.
Unfortunately I can't get a good picture from the other side since I hadn't planned on removing the O2 sensor housing.
Here are pictures of the blade measurements.
Unfortunately I can't get a good picture from the other side since I hadn't planned on removing the O2 sensor housing.
Here are pictures of the blade measurements.
Last edited by 2006EvoIXer; Apr 28, 2018 at 02:42 PM.