Turbo Rebuild

Post by **Legacy777** » Sun Aug 14, 2005 11:13 pm

I started tearing the turbo apart today. I don't use a 13mm wrench too often, but the bolts on the exhaust housing are that....little weird.

For anyone that's done this, any pointers on getting the exhaust housing separated from the center portion where the bearings are. I hosed it pretty good with PB blaster, but it didn't move. I'll leave it sit over night.

here's pics of things so far.
http://www.main.experiencetherave.com:8 ... s/ej22t/15

THAWA · Post by **THAWA** » Mon Aug 15, 2005 1:50 am

Cool stuff Josh, if you have a caliper, could you measure up some things and add to this thread: http://bbs.legacycentral.org/viewtopic.php?t=22499

As far as pulling the rest apart, see if any of these threads help: http://www.mx6.com/forums/forumdisplay. ... a21e7&f=92

Post by **Legacy777** » Mon Aug 15, 2005 2:12 am

Yeah, I can measure things. It's a VF11, and looks like you have that info already, but I'll check everything.

Thanks for the link.

THAWA · Post by **THAWA** » Mon Aug 15, 2005 2:52 am

There's not much info on the VF11 actually, if you could get measurements of both inducers and exducers that'd be awesome.

-K- · Post by **-K-** » Mon Aug 15, 2005 3:01 am

Your best bet is to soak it in solvent for a few days-month.

Heat is the other big factor, get a torch on the housing.

stipro · Post by **stipro** » Mon Aug 15, 2005 3:35 am

If it helps any, to remove the exhaust housing, I used "rost off" from Wurth. I let it soak for a day, and did some light taping with a wooden mallet.

Tleg93 · Post by **Tleg93** » Mon Aug 15, 2005 12:56 pm

Oh cool, you're rebuilding the stock turbo. What are the first four pics of?

Post by **Legacy777** » Mon Aug 15, 2005 6:18 pm

I think I know what parts you're talking about, when you say inducers & exducers......this part?
http://www.main.experiencetherave.com:8 ... P_4905.JPG

Yeah, I was going to take a torch to it, and see how that works.

The first four pics are of the oil pan. I had some fitment issues, so I was bending things. Here's my thread with more info about it at the bottom.
http://bbs.legacycentral.org/viewtopic.php?t=22652

THAWA · Post by **THAWA** » Mon Aug 15, 2005 10:36 pm

The inducers and exducers are part of blades, like in this pic: http://www.main.experiencetherave.com:8 ... P_4902.JPG
The inducer would be the smaller part of the compressor wheel, and the exducer would be the larger part of the compressor wheel. The turbine wheel is just the opposite, since it works in the opposite way of the compressor wheel, meaning that the larger part of the turbine wheel is the inducer, and the smaller part is the exducer.

Post by **Legacy777** » Tue Aug 16, 2005 2:43 am

So are you wanting measurements of parts of the blade itself?

I ran into a little roadblock. First thing, I didn't mark the orientation of the compressor housing. However with reassembling things I got that taken care of. I went to try and get the turbine section off. That sucker is on there. All I have is a propane torch, and that isn't cutting it. I may see if anyone locally has an oxy-acetylene torch. If not, I'm probably just going clean things out with solvent and put it back together. There's really no play in the shaft, and it spins freely. I just don't want to spend oodles of time and sweat over a turbo that will eventually be coming off. I already have to drill out the one stud. It's broke and all fubared.

Post by **Legacy777** » Sun Aug 21, 2005 2:07 am

Hardy,

I'm planning to put the turbo back together tomorrow. I can't get the turbine housing off, and like I mentioned the turbo spins freely, and doesn't have any excessive end play.

I'm still not sure what info you want. I made up this drawing, is that what you want? If not, can you draw on the picture as to what you would like?
http://www.main.experiencetherave.com:8 ... _blade.jpg
thanks

gt350 · Post by **gt350** » Sun Aug 21, 2005 2:23 am

the inducer is if you were looking at the wheel from straight on(ie looking at the nut that holds it on as your centerline) measure from one side of the wheel to the other measuring the diameter of the wheel. the over all size of the wheel is your exducer diameter. the diameter of the top fins is you inducer diameter. make any sence? i'll try and find a link so it will make sence.

Post by **Legacy777** » Wed Sep 14, 2005 2:26 am

I've got an update.

Got Dave's colorful turbo. It's pretty well shot. shaft play is quite a bit, and the compressor blades are pretty rough.

After some more agressive persuasion I got the turbine housing off the old turbo as well as the new turbo. I spent quite a bit of time working on one of the bolts holding the thing together.

I did find that both turbine housings have hairline cracks around the wastegate valve, and the end of the turbine "swoosh".

The plan is to use the turbine housing off of Dave's turbo, and the guts from the old one. I do plan to rebuild it though.

Here's pics. They didn't turn out that great.
http://www.main.experiencetherave.com:8 ... s/ej22t/27

Matt Monson · Post by **Matt Monson** » Wed Sep 14, 2005 6:38 pm

Josh,
I've still got a good used one if you want to bail out on this nasty operation...

Post by **Legacy777** » Wed Sep 14, 2005 6:42 pm

I should be ok, assuming I can get the studs out. I'll know by this weekend whether things are going to cooperate or not.

I'll let ya know.

Thanks.

Post by **Legacy777** » Fri Jan 06, 2006 4:55 am

Well after nearly 4 months.....I finally got the damn studs out of the turbine housing. Not sure if letting them set for this long made a difference, but I decided to try and tackle this again since I need to do something about the current turbo that's on the car.

I need to review the rebuild tips for the turbo and see if it's something I really want to try and tackle....or if I should just stick the turbine & compressor housings back together and run the turbo until I decide to upgrade. The shaft play on the original one was very very minimal.

I got the studs smoking when I removing the one nut......it was really on there....and pb blaster didn't help much to lubricate and make things smoother.

Pics
http://www.main.experiencetherave.com:8 ... urbostuds/

Post by **Legacy777** » Sun Jan 08, 2006 4:18 am

I'm probably not going to bother rebuilding. The kit I have doesn't appear to have new seals....just the bearings....so I don't know if it's worth me tearing up the guts if the shaft play is minimal. Especially since the rebuild pictures that are on the link above are not working...

free5ty1e · Post by **free5ty1e** » Sun Jan 08, 2006 4:52 pm

IIRC, the IHI RHB5 rebuild kits just have bearings. I didn't encounter any seals (o-rings, etc) while rebuilding the VF11/VJ17 hybrid. If you have the snap ring tool to remove the bearing/plate behind the compressor wheel, and you've gotten the turbine side off, shouldn't be tough to replace the bearings and reassemble.

Also, (IIRC) 65 in/lbs is the torque specified for the retaining nut once everything's all back together.

Sure has been a while though.

Post by **Legacy777** » Sun Jan 08, 2006 10:22 pm

That's sort of where I'm at with the "test" turbo. I can't seem to get that plate off behind the compressor wheel. How is it removed?

free5ty1e · Post by **free5ty1e** » Tue Jan 10, 2006 3:37 pm

Yeah, that's a bitch, that piece. The tool you need is like a pair of needle-nose pliers, only the tips are bent at a 90 degree angle. It's possible to remove with normal needle-nose pliers and some helper tools for prying, but you'll scratch the hell out of the old part and go through your entire list of expletives, guaranteed.

Take the turbo with you to a tool store and use it to size an appropriate snap-ring tool.

In other words, there's nothing retaining that plate/bearing in the turbo except it's own friction, if you can believe that.

Post by **Legacy777** » Sat Jan 14, 2006 3:57 am

I'm probably going to pass on rebuilding it. I destroyed the plate on the test turbo trying to get it out. Plus the screws on the plate underneath that didn't want to come out either. So I'd rather not fark up the good turbo.

free5ty1e · Post by **free5ty1e** » Sat Jan 14, 2006 3:35 pm

Wow really - the plate got destroyed? That sucks. How bad of a condition was the test turbo in? I rebuilt mine while it was still working OK. Sorry to hear that.

Post by **Legacy777** » Sat Jan 14, 2006 7:02 pm

The test turbo was the one Dave sent me. It was dead anyway. There was so much shaft play the turbine and compressor blades had made contact on the housings. The shaft was worn, so it was dead.

I couldn't get one of screws out that was holding the plate....so I drilled the head out.....then took a punch to it to try and turn it.....so destroying that plate was mainly my fault. But I even tried to get the screws out from the small plate underneath and the head on them just stripped too.

I don't want to have to deal with that.

waldo320 · Post by **waldo320** » Sat Jan 14, 2006 8:20 pm

Hey just rebuilt my vf11 bigest pain in the rear get it all togher and the turbine is rubbing on the exhaust side. So look in the phone for someone who can work on turbos and low and behold I find this older guy and basically said come back and Ill teach you to balance the shaft. So after that awesome hours or so in turbo heaven I left with the ideals of do no try to rebuild your turbo cause all you'll do is mess it up more than beofre.

free5ty1e · Post by **free5ty1e** » Sun Jan 15, 2006 1:42 am

Huh. I'll be damned. I had no such difficulties. I also ported the turbine outlet a bit with a dremel, since I've got a pretty unrestrictive 3" turbo-back. Did the same thing to the compressor inlet & outlet. Was pretty easy while it was all apart. Seemed to help a bit; my turbo is very happy.

The only problem I had was getting that plate off, and that was only until I got the snap ring tool. My turbo had little shaft play to begin with, but the bearings provided kinda should have corrected most of those problems. Rebuild kit for the RHB5 was $90 at a local turbo shop.

I'm sorry to hear about the unfortunate turbos.

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