Gt30 Exhaust Housing Wont Fit

[gts-t 32]

Ok so I have a gt3037s 56t same as a gt3076r turbo and I just brought a exhaust t3 .82 housing but it wont fit over the exhaust wheel. This housing came off a gt3076 turbo and I don't know why it doesn't fit can anyone help

[TiTAN]

do you have the hks housing? why not just use that?

[gts-t 32]

Cause it had a sonic internal low mount housing on it and I am changing it to high mount setup

[Dale FZ1]

It won't fit because the housing has been profiled (machined) to suit a different turbine rotor. Get it to a reputable turbocharger builder/rebuilder and see if they can measure up and make it fit.

[gts-t 32]

Ok I would have thought one size fits all gt3076's as this is a second hand housing

[The Dan]

There are approx 6 different 3076's but all have the exact same turbine (not counting the EVO upgrades). I'd say you have been given the wrong housing - 3071 maybe?

Measure the exducer hole difference between the two housings you have and post it here

If it's close to 54mm or slightly under, it's probably the 3071 housing. If it's closer to 55mm then it should be correct and there might be something else that you're not seeing

[JonnoHR31]

Measure your turbine, if it's 60mm then the housing is to suit either something else or a cropped gt30 (~56mm from memory) in which case you can get it machined or buy another to suit.

If your turbine isn't 60mm, which is unlikely, then it's not a gt30 turbine and you have some weird bitsa turbo.

[JonnoHR31]

There are approx 6 different 3076's but all have the exact same turbine (not counting the EVO upgrades). I'd say you have been given the wrong housing - 3071 maybe?

Measure the exducer hole difference between the two housings you have and post it here

3071 uses the same turbine as a 3076. And whilst a normal gt30 has a 60mm turbine not all 3076's have the exact same turbine, most of the ones that come with the 6 bolt "bolt on" housings have cropped wheels and smaller housings.

[AngryRB]

It doesnt look like it,but if the inside was ceramic coated it could have that issue,

when i had mine coated the turbine was a bit too tight on the housing, so i filed the coating off round there...

On the garrett website theres also a turbo called a gt3271, which has a turbine diameter of 64mm , is your turbo definitely what you think it is?

wonder if that turbine would of been better on the exhaust side of the gtx3076...

Edited July 17, 2012 by SliverS2

[The Dan]

GT3071R

Turbine Wheel Exducer Size 51.78mm

Turbine wheel Trim 84

GT3076R (700382-5012)

Turbine Wheel Exducer Size 54.98mm

Turbine wheel Trim 84

How are they the same?

[The Dan]

Part Number Turbo HP Rating CHRA COMP HSG SRG C A/R C-IND Trim EX HSG EX-EXD Trim

700382-5003 GT3071R 300-460Hp (1.8L-3.0L) 700177-5003 467927-0041 NO 0.50 53.14 56 448420-0002 51.78 84

776332-5001 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467927-0041 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5002 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467927-0041 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5003 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467927-0041 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5004 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467927-0041 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5005 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467927-0041 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5006 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467927-0041 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5007 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467987-0015 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5008 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467987-0015 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5009 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467987-0015 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5010 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467987-0015 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5011 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467987-0015 NO 0.50 53.14 56 448420-0002 54.98 84

776332-5012 GT3071R 300-460Hp (1.8L-3.0L) 700177-0023 467987-0015 NO 0.50 53.14 56 448420-0002 54.98 84

700382-5020 GT3071R 300-460Hp (1.8L-3.0L) 700177-5004 467987-0015 NO 0.50 53.14 56 448420-0002 53.60 90

700382-5012 GT3076R 350-500Hp (2.0L-3.0L) 700177-5007 436157-0023 YES 0.60 57.00 56 448420-0002 54.98 84

714569-5001 GT3076R 350-480Hp (2.0L-3.0L) 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

714569-5002 GT3076R 350-480Hp (2.0L-3.0L) 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

714569-5003 GT3076R 350-480Hp (2.0L-3.0L) 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774728-5001 GT3076R 350-480Hp (2.0L-3.0L) 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774728-5002 GT3076R 350-480Hp (2.0L-3.0L) 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774728-5003 GT3076R 350-480Hp (2.0L-3.0L) 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774181-5001 GT3076R 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774181-5002 GT3076R 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774181-5003 GT3076R 700177-5018 409722-0020 NO 0.70 54.97 52 451607-0000 54.98 84

774156-5001 GT3076R 350-500Hp (2.0L-3.0L) 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774156-5002 GT3076R 350-500Hp (2.0L-3.0L) 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774156-5003 GT3076R 350-500Hp (2.0L-3.0L) 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774156-5004 GT3076R 350-500Hp (2.0L-3.0L) 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774156-5005 GT3076R 350-500Hp (2.0L-3.0L) 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774156-5006 GT3076R 350-500Hp (2.0L-3.0L) 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774157-5001 GT3076R 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774157-5002 GT3076R 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

774157-5003 GT3076R 700177-5012 409722-0035 NO 0.70 57.02 56 451607-0000 54.98 84

Cept this one from the master list reports them as the same. It also reports different wheel sizes altogether

Now I gotta make a bloody phone call

[The Dan]

Where's discopotato when you need him to spit out a whole bunch of numbers and specs that no one knows?

[AngryRB]

why does it say on the garrett website that there interchangable?

[The Dan]

They both have an exhaust inducer size of 60mm but different exducers from what I can see. I think you are still right about the housings being interchangeable though. I seem to remember something about that when I was last fiddling with one we needed to change but it's been a little while

[discopotato03]

Been up all night out on the rails but thats life .

Three things I'd look at if it were me .

First the turbos ID plate for its part numbers .

Second , some early HKS GT30 spec turbos had a slightly differently machined register on the bearing housing and the turbine housing needs to match it . I remember reading that later housings could be altered to suit .

Thirdly , it'd be real easy to compare the existing and replacement turbine housing to see whats dimensionally different .

If the turbo is in fact a HKS spec GT3037 it will have the same turbine as as any other Garrett GT30 BB turbo with the full sized ie 59.9mm GT30 turbine .

I'd get a steel rule or preferably a Vernier caliper and start measuring those housings .

A .

[GTScotT]

seems like it could be a for a different trim wheel hmm

id say hypergear could fix that issue for it, have you PM'd him?

ud just send him the turbo and the housing and hed send it back all fitted up.

[Lithium]

It could be a .82 T3 exhaust housing for an actual T3 turbo? Ie, not a GT30?

[The Dan]

I just confirmed, the early HKS 3037 had a turbine wheel size difference of about 1mm so if you have that turbo, that is why it doesn't fit. Take it to a turbo shop to have it machined to suit

[gts-t 32]

Yip I’m sure your right about that one. I would say it hits by about half a mill all round. Thanks for your help guys.

[discopotato03]

News to me , all GT30 UHP turbines were the same 84 trim size which from memory makes the exducer a whisker under 55mm . By this Imean the full sized GT30 turbines not the cropped 84 and 80T ones .

The difference I was talking about was the back of the center housing not the turbine wheel itself .

ck the car

Check the cartridge number if the tag shows it .

A .