Turbo rebuild

[leathermaneod]

Hey all, 

So based on the pics Im pretty sure I need to rebuild my turbo sometimes before too long. I had a thread on here about it before, but decided it wasnt as urgent as I thought. I thought any shaft play at all was bad, and thanks to you all I learned that is not the case. Anyway, I changed my oil today and I was wondering what you all think of these pics. It doesnt seem to rub at all when I spin it by hand and even when I push it to the side and try to get it to, but in the lower left there are a couple spots that look like they could have touched....by the way I didnt mess with it too much because I've heard its very bad to spin a turbo without oil circulating through it. Yes I know the blades are knicked and I need a new comp wheel. Thats one of the big reasons I haven't rebuilt it yet. 

 

[Dieselfuture]

What air filter are you using, looks kinda dirty. I've rebuilt tubes before on my rx7 I had when was younger, didn't think it was that hard at all just time is all. 

[IBMobile]

I think you may have worn bearings and to much radial play.  See no. 5 below.

[leathermaneod]

@Dieselfuture I am using a donaldson BHAF, and it is sealing properly.

 

@IBMobile Just curious, why do you suspect to much play? I can definitely measure that clearance though, just need to find a feeler gauge that is narrow. I only have the normal wide style, dont think that would be very accurate.

 

what is the axial end play compared to the bearing clearance?

 

Also, any idea where to get a good comp wheel? Ebay has some for $40 but I'm not sure of the quality...

 

Also, how big of a deal is it to get the shaft balanced after a rebuild?

 

Any idea what size the inducer/exducer are? 54mm and 78mm?

 

Found this on amazon https://www.amazon.com/Holset-HE341-Blade-Compressor-Wheel/dp/B01BUK4AR2

 

Edited July 13, 2016 by leathermaneod

[TFaoro]

Have you cleaned it before? If not, starting fluid works pretty good. Any oil out the compressed side?

I think it's a 57 inducer, but I don't remember the exducer size.

 

Some say you have to have it rebalanced, but I don't believe it. Each part is individually balanced, so you should be fine without balancing.

[leathermaneod]

That's good to hear on the balancing! Yes I have a little oil out the comp side. Just enough to make it a little wet in the elbow that's right there. None in the intercooler pipe that I saw before. I have cleaned it, but only wiped it out what I could reachwith a rag, so that didn't do much. 

[Royal Squire]

You can download a holset manual for your turbo and it will guide you through the rebuild. My kit didn't come with the turbo to down pipe adapter gasket and mine was in 3 pieces so had to get that separate. 

[leathermaneod]

Thank you for you input! Yes I already have a rebuild kit including that gasket. All I would need at this point is a new compressor wheel and the short piece of silicone hose in the drain tube. There is also a write up on CF on the rebuild process so I should be good to go. 

just found this, I may look into finding a rebuilder or see if there is a way to get a rebuilt hx35 and use mine for a core, just because of the balancing aspect. Not sure if there are any good options for something like that? Anyone on here know of someone who does quality work on turbos at a fair price? 

[leathermaneod]

Heres another question, where in the world do you find a feeler gauge narrow enough to measure this?? Mine are like a 1/2 wide and not flexible enough to conform to the curvature of the compressor housing.

[BBHD]

You could use a set of spark plug wire gauges

[leathermaneod]

Possibly, I don't think I've ever seen those in enough sizes for this though. Plus they are usually in a circular configuration which would not work for this. I was just at autozone and they had a mini feeler gauge but I don't think it had enough sizes either. 

[IBMobile]

16 hours ago, leathermaneod said:

@IBMobile Just curious, why do you suspect to much play? I can definitely measure that clearance though, just need to find a feeler gauge that is narrow. I only have the normal wide style, dont think that would be very accurate.

If the compressor wheel touches the housing then the bushings/bearings are worn and that translates into excessive radial movement and the turbo needs to be rebuilt.  Some rebuilders deem the core non-rebuild able if the compressor wheel gouges the housing.

You can make a feeler gauge out of a strip of plastic sanded to the thickness you need.  An oil jug and a coolant antifreeze side wall is .038-.034" and .017-.019" respectively.  You'll need a micrometer or caliper for measuring.

 

17 hours ago, leathermaneod said:

what is the axial end play compared to the bearing clearance?

 

Axial end play is the movement of the shaft in and out.  Don't worry about the axial end play for now. 

 

[leathermaneod]

Thank you for the info! Yes I understand that it is very bad if the wheel touches the housing. Did the pictures look like it has in your opinion? 

[TFaoro]

4 hours ago, leathermaneod said:

Thank you for the info! Yes I understand that it is very bad if the wheel touches the housing. Did the pictures look like it has in your opinion? 

Negative...

[Mopar1973Man]

I'm following along with the HX35/40 turbo that @CSM gave me. So far after disassembly of the compressor housing I can test the compressor wheel is nearly making contact with the housing. Enough the tip of the compressor wheel where clean. It did have some oil residue showing on the exhaust side. So rebuilding is going to be required...

[IBMobile]

On ‎7‎/‎14‎/‎2016 at 3:14 AM, leathermaneod said:

Did the pictures look like it has in your opinion?

Looks the same as mine less the nick. If there is no or barely any movement of the shaft side to side with no oil leaks than don't worry about it.    

[leathermaneod]

Anyone know a good source for an OEM HX35 compressor wheel? Ive been looking online and there are some cheap ones on ebay, but I cant seem to find any that are OEM Holset, and if I'm going through all the trouble of rebuilding and balancing this thing, I dont want to throw a crap wheel on it. I don't want a Wicked Wheel either, just a stock HX35 wheel would be perfect. Just hoping it doesnt cost an arm and leg. 

[Mopar1973Man]

Will this work?

http://baeturbosystems.com/compressorwheelformitsubishitd04hl4350mminducer-5600mmexducer-3-3-1-1.aspx

[leathermaneod]

I believe stock size is 54mm x 78mm, but I could be wrong. If they have one in the correct size, would you buy from them? like this...http://baeturbosystems.com/compressorwheelformitsubishitd04hl4350mminducer-5600mmexducer-3-3-1-1-1-4-2-2-1-3-1-1.aspx

Edited July 22, 2016 by leathermaneod

[Mopar1973Man]

Best I can say is measure your old wheel. At least I found a place that sells compressor wheels.