pjman

I have a 20B cosmo and one of the exhasut sleeves (I think thats what it is) is loose. This means that there are pins loose somewhere.



Can I just tack weld it in place? I guess this won't be possible as there are two different metals used.





http://members.ozemail.com.au/~bj.sm...mo/exhaust.avi



Hope you experts can help me.



Also - has anyone high flowed the standard turbos? I want a bit more power but don't want to go to a single yet as I expect that will also require computers etc etc.

j9fd3s

seems like you could tack it in there? or if the motors apart, use a larger pin?

C. Ludwig

I had a customer's engine show up like that a couple months ago. At the time he didn't want to tear the entire engine down to fix it right so I built up some weld on the flange of the manifold and worked it with a grinder so that it rested against the sleeve and held it firmly in place. Those things make a hell of a racket flopping around in there!



It ended up being a moot point as the flywheel key sheared off shortly after that and I pulled the engine down to the bolts to make sure nothing else was going to fall apart on it. That thing was a PIECE!



Problem with "just tack welding it" is that there is nothing to weld to. Kind difficult to weld the steel sleeve to the aluminum housing.

pjman

Thanks for the responses.



Here is another question. Is there any reason why the pin could not go completely through the housing and out the sleeve? What I am thinking is that if its still in there I can get it out through the sleeve end.



Does anyone have a picture of one of these pins?

pjman

OK - I have been away for work for a week and just got back. i went and had a look and the pins are still in there. It looks like it started to get a bit loose and had slowly ground away to be like this.



There doesn't apear to be any way to get the pins out from the sleeve side so I think I will take your advice and get the welds built up to hold it in place. I was considering getting a shim machined up to hold it there but am unsure what the expansion rates etc in the heat are and what damage it may do - particularly to the gasket.



I think I will get it done so its got a bead around a quarter of the hole on the top and the bottom. That should hold it in ok.

pjman

Done. I ended up using a shim. Its worked well so far.