So i need some assistance here.... i am in the process of reassembling a spare turbocharger i had for my little brothers soon-to-be assembled turbo motor after porting the wastegate and for some odd reason when i tighten down the turbine housing retainers the center cartridge is still able to rotate freely. did i miss something? i didnt think there was any type of spacer between the turbine housing and turbine backplate is there? i have had my own turbo together for a couple of years now and dont remember there ever having been something and havent ever had this problem before. thanks in advance. Shawn

 

The only thing holding them in are those clips that go from bolt to bolt. try to tighten those bolts in evenly

 

tried that and even with all 6 bolts fully tighted you can still turn the turbine housing seperate from the rest of the turbo.

 

Could you post some pics of the assembly?

You have the retaining clips holding the housing's on, right?

I just rebuilt a turbo last week and have another one im going to do as soon as I get another turbine housing.

 

Well, did u fully dissassemble the turbo? Behind the turbo wheel there is this plate, I dont know if you took it fully apart and forgot to put it back

 

nope i didnt fully disassemble, i just removed the exhaust side for porting but that was like a year or better. basically i bought a jdm motor like 2-3 years ago. installed that in my tii, prior to installing on my tii i ported the wastegate and exhaust housing. rebuilt that motor and ran that turbo until broke in. purchased a hybrid that still had the stock hotside with no mods and t4 cold side. pulled the hybrid hot side and my ported hot side and installed the ported hotside on my hybrid. that i have been running since (bout 2 years). my brother purchased an n/a with a blown motor. i took left over parts from my original tii motor, purchased some used housing and we are building a high comp street port turbo setup for his car (with complete TII drivetrain and electronics from a donor car that had no motor). so i pulled out my old turbo (which was cold side and center section still attached and exhaust housing that was not modified yet from my hybrid but wasnt installed on the rest of the turbo) and began to assemble it to clock the setup and install it on our street port high comp short block and that is when i ran into the issue with installation of the hot side. after tightening all of the 6 bolts with retainers around the hotside you can still rotate the housing. i cant remember if when i switched the housing off my stock turbo to my hybrid if there was a crush gasket or something between the turbine housing and the center section and if so that would explain why i cant get the turbine housing tight on the center section and then of course will need to source one. thanks again.

 

There was no gasket for mines. Wow, high comp street port turbo. Sounds riskey, but I guess if you have your tuning down it will work

 

yeah we are just looking for low boost and leaving the stock fuel cut in place as a safety measure along with stock tII exhaust until he can afford to modify the rest of the systems necessary to make some good power. but the car (88gxl) was cheap (read: $275), i had recently parted 2 turbo cars (read: tons of free parts, lucky bastard), and i felt like playing around with another one whilst waiting for funds to further modify my tii. i think he has invested an addition $600 or so in misc parts, gaskets, and new apex seals.

 

alright i have tried 2 different turbine housings and both suffer from the same issues, after fully tightening all 6 bolts down i still have about 1/64 inch space between the washers and the chra. because of this i can still spin the turbine housings, hence not being able to lock in the clocking of the turbine housing. anybody have any ideas? it seems as though there would be like a crush gasket that went into the turbine housing prior to bolting in the chra, can anyone else confirm that there shouldnt be anything else in there.

 

i dont think it makes a difference, but maybe theres a series difference between the chra and turbine housing. i cant think of anything else...
is the bolt clip thing (that tightens the housing to the chra) in the right spot? i believe theres a bit of a recessed area for it to set. but i havent taken apart my turbo for a few months, so im not completely sure.,

 

yeah i have tried everything possible and both the turbine housings and chra are series 4 units, i just gonna make a shim out of copper stock

 

its too bad you cant get any pics up to show us. if it were me, i would keep tryion to figure it out befre i used a shim.

 

ill try to snap some pics tonight