I just got me a new turbo. It aint new. It aint pretty. But for $30 im happy.

Its a T25 from an old Saab 9000 and it has a bizzare turbine outlet flange.

http://photo.platonoff.com/Auto/2005...Two_turbos.jpg
You can see it clearly on the left hand turbo.

Saab used a retaining ring to clamp the end of the piece of pipe directly to the turbine housing. Its quite a clever way of doing it IMO.



So my question is this. Do I get a piece of pipe with a suitable diameter and flare the edge to use saabs method. Or do I make a flange that will fit directly to the turbine housing and then weld the pipe to that flange?

I dont have the retaining ring for the Saab method so I will have fabricate some **** either way.

Any input greatly appreciated.

Tom

 

$30, and you have fab skills, just make it work any way you can

 

It's not that odd- a lot of headers/exhaust/collectors use a radius pipe end and flange like that. Here's a two bolt for a honda:

 

I have seen them on other exhaust bits (usually with spring loaded bolts to let the exhaust move a bit) just never on the turbo itself. Like I said it seemed quite a neat way of doing it but I'm leaning towards just making a flange to weld the DP to unless I can find a saab DP to cannibalise in a scrapyard.

 

If you have access to a pipe expander I've seen a muffler shop guy use that to shape straight pipe into a flared pipe for mating to donut gaskets. Sounds like the saab turbo is similar so the same principle should apply.

 

Quick supplemental question.

I'm stripping the turbo for a quick rebuild and the turbine housing is being real bitch to remove from the CHRA. In most of the guides I've read unwinding the the housing bolts will push on the CHRA and force it off but my bolts are too short and come out before they make contact. I have left it soaking with penetratring oil for now. Should I get in there with a rubber mallet or a pry bar? Or maybe get some heat on there?

 

Huzzah!!! got the bastard thing off. After soaking it in WD-40 for a while I managed to prise it off using my vintage dunlop tire irons. Why do old tools work best? I suppose if they were crap I wouldn't have kept them so long