This past week I found myself a used HX35. It's off a 97 and has been sitting on a shelf for a very long time. It came off a new truck that had rolled and the turbo was exchanged for one more applicable in a forestry application.

Home this weekend I figured I'd tap into it. Here is my delema. I took off the oil inlet and return hoses, took off the wastegate actuator, the back of the exhaust housing and the snap ring off the compressor housing. The shaft will not turn because of corrosion on the compressor. However the exhaust side is perfect. I need to get this compressor housing off but dont want to damage anything. Should I loosen the nut on the compressor and take the housing and wheel off as a whole to avoid damage? Is there a neat way to take off the housing without beating on it? I need some suggestions from someone who's been in this situation.

Thanks,
Mike

 

You do not want to pull that wheel off of there , if you do , you will have to send it out and have someone balance it upon re-assembly, and i don't know who can do that around here...

this is what it would look like dis-assembled:



Soak it with penetrating fluid for a couple days , then give it some taps with a deadblow hammer.

 

Here's a question... Guys in the first gen forum have taken their turbos apart and upgraded them on the trucks. There's even a stickied thread for it. Is there a difference between upgrading an HX35 and a HIC/WHIC? If not I dont see why the upgrade can't be done on ones own.

Mike

 

I think you can do the HTT upgrades on the HX35 too , but only up to stage III. Me and Wannadiesel had a talk about this way back when , if he would chime in he knows the answers for sure. I think the center section/backing plate is different on the HX.

 

From what I understand, on an HIC, the backplate is separate from the turbo but on an HX35 it is fixed to or a part of the turbo. This would make sense because there's a Stage IV for the HIC but not for the HX35, to my knowledge. That stage IV is the only one with a modified backing plate.

 

That is exactly what i was thinking.

 

if you do take the comp. hsg. off, make sure it comes off straight. any canting during this procedure will in fact bend the blades on the wheel. also as he said, of you remove the shaft nut the balance will be affected. also in my experience the turbine side would seen to cause the lock-up, because its cats iron and would rust, the compressor side however is aluminum and if its weathered enough to corrode to the point of non spinning, I would think the exhaust side is twice as bad. you mentioned the truck was wrecked, I would think may be the turbo got jolted to the point of possible bending the turbine shaft, causing the binding. making the t/c junk.

 

In my personal expierience dont buy used equipment off of a wrecked truck. Most of the time unless you know the person or the truck, you're probably going to get taken for a ride if you know what I mean

 

you can pull it off...

most turbo shops do not dynamicly balance turbos w/ the wheels attached... the turbine wheel and the compressor wheel are balanced seperately, and it does not matter how they are clocked. OEM Holset turbos are not balanced as an assembly.

 

That makes sense considering there's a balance groove on the impeller itself.

Yesterday I removed the compressor housing and freed the impeller and it spins like new. Although, from a bit of oxidization the impeller is in bad shape so I'm thinking on either a new one or an upgrade. The exhaust side looks great too. I dont know whether they had that side protected but it looks like it's right off the truck.

Once cleaned up I can see it making a nice turbo. But in the mean time what should I look at... new OEM wheel or compressor upgrade? If so, what internals need to be upgraded? What have others done?

Mike

 

I think you can get a 60mm (inducer) wheel and housing with no modifications, or you can get the 60mm 6 blade (with bigger exducer and ~10% more airflow) and modify the center section.

I'd talk to HTT to get specifics.

 

I know a guy that put a T-61 Garrett turbo on his 24 valve truck, and his wife's 12 valver has a whopping T-66 turbo. I saw an add for a ball bearing turbo in diesel power mag. made by edge that is a 58mm compressor. I'm not sure of the cost of any of those but can tell you there are other options in hi perf. turbos . you are not limited to holset t/c's

 

I have an air research T401 I'd like to find out if I can use it. It looks smaller then my holset. I wonder if it would make a good top turbo for the holset in series?