Cracked turbine housing?

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Cracked turbine housing?

Postby deaner » Tue Dec 19, 2017 10:52 pm

Pulled apart the GT2871R elim on my A4 to throw a new CHRA in and found these... Ive seen old K26 porsche turbos cracking like this but cant find eff all on instances of elim housing ls cracking. What do you all think? I dont really want to go full frame yet and Im not too pumped about throwing a Ko3 on there... Run it and let er buck?
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Re: Cracked turbine housing?

Postby PRY4SNO » Wed Dec 20, 2017 9:15 pm

Can you get it welded without too much hassle/cost? If it were me, I'd just take it into work and have one of the welders buzz that back together until I could source a cost-effective replacement. Maybe others have a good reason disagree... but that's my two cents.
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Re: Cracked turbine housing?

Postby Rabbitracer43 » Wed Dec 20, 2017 10:24 pm

welding is possible, but cast-iron does have a tendency to crack again when welded if not welded properly.
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Re: Cracked turbine housing?

Postby deaner » Thu Dec 21, 2017 12:26 am

I thought about welding it up, then thought of probably having to do some machine work on it as well... not worth the cost in my head vs going full frame being as I already have a T25 housing for it. I just swapped over to wideband and eurodyne maestro so the plan was to go back to a ko3 for now while I save money for a manifold. Plans changed again tonight when I found one of the oil lines from a parts car has a crack in it. Saying EFF amd running this housing as is haha. Im feeling lucky.
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Re: Cracked turbine housing?

Postby dana » Fri Dec 22, 2017 8:58 am

id be tempted to run it
current:
-mk4 tdi wagon with some mods
-TDI b3 90q, holset turbo, be strong little connecting rods!
-the turbo tractor
past:
-11 second 90q junker
-20vt swapped 90q winter beater
-efi 10vt 4kq
-way too many other long gone urs's, 200's 4000's, b5's
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Re: Cracked turbine housing?

Postby deaner » Mon Dec 25, 2017 12:43 am

dana wrote:id be tempted to run it



Turbos already back in the car. Just gonna send it. :)
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Re: Cracked turbine housing?

Postby rallyfreak202 » Thu Jan 25, 2018 1:35 pm

Hey guys, I'm very familiar with seeing cracks in these areas (tongue and bearing housing seat). The crack that runs from volute tongue up to BH bore is probably due to poor metal composition. The
crack I'd worry about is on volute tongue. Usually this is due to the material stress relieving and once it does that, no problems. However, I see lots of cracking around a small, uncaptured
region (tongue). This area gets beat up and I'd worry about that coming off based on the quality of the material seen. Also, seems like there's a crack on the contour. In summary,
run the piss out of it and pull the core off routinely to inspect it. Preying for no FOD for you.
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