1990 Exhaust Manifold Passenger Side Flange???
 

I'm trying to install the drivetrain into EX5023 and have a question.

I have 1990 exhaust and there is a flange on the passenger side of the exhaust. There is NO FLANGE on the exhaust manifold. HOW DO THE TWO ATTACH???????????

Does anyone have a picture of the two pieces mating together?

It seems that there would be a sleeve with a triangular flange attached that would clamp to the exhaust manifold and then attach to the traingular flange on the exhaust. If so, I would like to buy one from someone.

Thanks
Brett

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Brett,
It seems like you are missing part of the exhaust manifold. The two should mate up together with a gasket between them. The gasket part # is 10147973 from GM. I'm not sure if this is still available. If it not I have a couple available.
Hope this helps, Dennis

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

You probably need a ball flange....I had to set that up on my 90 also

http://www.autopartsdealer.com/magna..._content=rank6

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Thanks Dennis. Lee, the driver's side has a ball flange but the passenger side exhaust pipe just has the triangular flange. I can see on the flange where a gasket has been. It looks like a I need a sleeve with a flange welded to it to go onto the CAT. The sleeve would attach with a clamp.

Does anyone know if this is how the stock setup is?

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

The ball would go into that flange...pic would help

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Here is what I have o work with, so far.

I have a ball flange on the driver's side of the CAT with the matching type of ball flange on the pipe exhaust. They meet up good. The flange on the passenger side exhaust pipe is "flat" flange though. Not a ball type. It's had a gasket on it before as well for another flat flange. Hope this helps???

Someone surely has a pic of the flange on the CAT??

Like this. You can see the flange and sleeve.
http://i53.tinypic.com/72t2s7.jpg

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Mine shows just a slip fit on the P/S

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Here is a pic of the CAT that looks like miine. My CAT does slip into the pipes but what would hold it besides the triangular flange? A clamp, maybe?

http://i54.tinypic.com/2801w5j.jpg

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Another TRiagle held in place by a flared pipe for DS

http://i134.photobucket.com/albums/q...f/DSCN3809.jpg

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

That must be the problem. I'll have to have a sleeve/flange fabbed up at the muffler shop.

Thanks, Lee!!

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

band clamp on the slip fit or PS

http://i134.photobucket.com/albums/q...f/DSCN3810.jpg

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Where can I get one of those band clamps???

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Brett, I could only see the manifold in the truck, looked like it had no cat....but the ones mounted are correct 90

Sorry

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Any Auto store; ask for a band clamp

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

The pic of the ones mounted are not of my car but the pass manifold is just like mine.

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Cool. I've honestly never seen one and I used to run an DC for an auto parts cahin. Auto Works, back in the 80's, now defunct.

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

OREilly and Advanced have them I think LEE also.....

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Once again, the FBI guys are on it!

Thanks, Lee!

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

All 1990-1991 have a ball end on driver side and triangle flat flange on passenger side.

Lee has a 1992 they have the slip fit on the passenger side.

Pete

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

UPDATE

Marc Haibeck has the missing piece for me to purchase.

Thanks for everyone's input. Much appreciated.

Brett

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

This is what it looks like on mine.
http://i301.photobucket.com/albums/n...utchjob018.jpg

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Cool. Thanks! Collector with a clamp.

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Those pics are of my 90

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Some of the larger diameter cat-back exh systems had a slip over pipe with a triangular flange. My car came with a 3" B&B setup and had a 2-3/4's adapter pipe to a 3" flange. It was welded permanently.

I had to have a mating flange welded up on my Corsa. I prefer it this way anyhow because the slip fit might leak or be difficult to align at some point.

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Lee, previous owner probably took it off.

Pete

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

When my cats went bad and I had to replace both manifolds I had to beat that collector/flange with a rubber mallet damn near 100 times before I got it off. That thing was on there good.

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Hello Brett,

I just found this after posting a WTB for this part you were looking for too. Were you able to the part you needed from Marc? It seems just like a typical header collector, but I don't find it in 3" to 2.75"; maybe I just get one of those and open up the 3" to
2.5" to 2.75" to slip over the pipe?

Thanks,

Craig

Re: 1990 Exhaust Manifold Passenger Side Flange???
 

Do anyone know where to get this gasket?