Gt3076R Leaking From Exhaust Housing !

[Bratva]

Hello,

I put my automobile together with the new turbo (<5000km one) from GCG for R34 GTT and noticed i get smoke from the engine bay. I thought it was leaking from oil drain hose so i removed everything, new gasket, tightened everything but still leaking. On closer inspection i can see oil coming out of the bottom of the exhaust housing! This is basically new turbo what can cause this ?

Could it be that it was sitting for 6months in my cupboard and the seal dried out ?

Or is there too much crankcase pressure ?

Or something more serious ?

Please assist!

Thanks

[The Dan]

Most likely blocked oil drain hose or a crank case breather problem possibly. Is it an off the shelf 3076 or is it a 3076 in skyline housings?

Also who fitted the turbo for you?

[Bratva]

Hey,

Oil drain hose is clear as is the hole, i removed the hose and the metal pipe bit to replace the gasket, o ring and tighten it as i thought this was the culprit.

It's a off the shelf 3076 kit for R34 GTT specifically so straight bolt on.

Not sure if my oil pressure sender is working right but it goes to <1 on the stock gauge after running it for 10minutes.

I fitted the turbo myself to make sure everything was put on well, i did take the manifold to get the studs removed/installed by workshop but they fuarked one of them up! All oil lines were super tight !

You reckon it could be PVC valve ?

Car smells heaps popcorny, oil isnt blowing out of exhaust, just burning off when it hits the outside of the exhaust housing.

[The Dan]

Ok so it has something like an AVO turbine housing on it and you're running a 10-12mm spacer to get comp cover clearance on the standard manifold?

Sounds all normal to me. You might have a dodgy turbo on your hands. It would be very unlikely/uncommon to have a new garret core piss oil out like that but you would need to send it back to have it checked.

Judging by your comment on its km age I assume you bought it second hand? If so, give it back.

[Bratva]

Yeah thats right i got the standard mani and the spacer. The guy that sold me the turbo sold me all the kit off his skyline, which has some minor front end damage he was a member of this forum. Won't be able to give it back as i bought it many many months ago.

Say i pull the turbo out, remove the exhaust housing and give it to someone to change seals etc (If thats what needs to be done) how much would that end up costing and would this be repairable ? Ill take some photos when i get the chance to pull it out.

Have you seen something like this before ?

Thanks for your help

[The Dan]

Yeah some photos would be great.

No I haven't seen anything like what you are describing but without seeing it, it's very hard to say. Oil has a funny way of coming from one place but looking like it comes from another.

If you take the turbo off and there is oil inside the turbine housing, then there is a problem. It's not as simple as a quick rebuild as usually this will cost you more than just replacing the core altogether. Just make sure it's not something silly like a scored copper washer of a weeping oil feed line right up where it feeds into the turbo.

[AngryRB]

just wondering, if its a ball bearing core, then it would would/should have a restrictor for the oil flow ??

if that restrictor was not there that might cause excessive oil pressure which could force its way out the seals could it?

[The Dan]

Yeah it can do that but it's a mission and a half to get that restrictor out. They don't just fall out, you need to wind a screw into the guts of them and pull them out with some sidies

[Sinista32]

Hi Ben, just saw this, Very sorry to hear mate. Here is some pics up of the Turbo prior to fitting.

It's a proper garret spec GT3076r kit from GCG with the .82a/r housing and 4inch surge slotted inlet.

It was bought from a member in June 2011 who had a very minor front ender before it had even done 5000kms, which the insurance company wrote off.

I dont think it's serious mate. Current pics may help these guys diagnose. If you cant sort it Cooma Diesel in Fyshwick are the local Garrett rep.

[The Dan]

It looks like the cartridge is covered in oil in that pic with the GCG tag.

It's not an oil feed line weeping or something is it?

[AngryRB]

hey richard hows that turbo going? what power is it putting out?

interesting how the wastegate dump returns so early, guess it would be good for making it look more stock etc.. but does it hurt the performance..

when your buying such a crucial component i would not want to compromise on using stock housings and doing that sort of exhaust outlet,

[Sinista32]

It looks like the cartridge is covered in oil in that pic with the GCG tag.

It's not an oil feed line weeping or something is it?

Where both those tags are pictured there appears to be additional thread on the line connections. Is that suppose to be like that or should it be screwed in flush? May have been like this from when the Turbo was removed. Ben - whats it like fitted?

Hi Mark the turbo when on the 34GTT made 304kw's with the Nistune. This was done by chequerd/status tunning.

[AngryRB]

nice .... looks like a very nice turbo

[Bratva]

Hi guys! Hey Richard im Anton btw

Thanks for the gear by the way sounds good and no issues except that little oil leak, its really minor doesnt use up any oil but because its on the exhaust housing it burns off instantly and the whole car smells like popcorn!

Ill pull the turbo out sometime this week so i can have a closer look and show some photos, hopefully its just a loose oil connection.

Also anyone know where to get some 50+mm long exhaust manifold studs ? No one seems to have them and mine are too short by a few threads.

[Sinista32]

Ahhh - sorry Anton. dont know what I was thinking. Maybe those big guns of yours put me off.

Plus had few Bens around buying heaps of gear too.

Specialty Fastners in Fyshwick for the manifold studs. Take one with you.

[Bratva]

Thanks ill check them out, and put them in myself this time! Took the manifold to an exhaust shop, two shops didnt want to do it, the other did it but didn't tighten one of the studs and it came loose when i tightened the bolt so i got an exhaust leak now!

[AngryRB]

i would recommend getting all those bolts from the dealer..replace the lot. cant go wrong with original factory stuff

you should also get the manifold faced, pretty common for them to be warped.. save yourself doing everything twice.

[Bratva]

The actual manifold studs are brand new i think the owner before me replaced them all, but i cant get the turbo to manifold studs from the dealer because they are too short.

You reckon getting the manifold faced on both ends is a good idea ?

[AngryRB]

i would definitely be checking it and probably just get it done anyway, when i took mine off it was warped, the heat warps it , even your brakes get warped with alot of hard braking and eventually need machining,

i got those extra long manifold bolts from ERD, but a nuts and bolts shop should have some good ones..

[Simon-S14]

having a leaking gasket usually warps the manifold... if its all sealed up then theres no reason why it should be warped. check it with a straight edge anyway