After putting in my new rebuilt engine. I find that i have a huge exhaust leak coming from the connection between the manifold and the y-pipe on both sides. I have been told that i have the wrong donut gaskets. Every part store ive been too has told me that they cant order the one i need, its not available to them to order. I went to a dealership, and they gave me the same one i have on there now. Does anyone know where i can get this? Or are they actually giving me the right part?
Thanks

 

Funny, I visited my set of spare manifolds, from when I did my 2.8->3.4 swap.
I had also read Tom's post about his dougnuts and it's restrictiveness. When I examined my doughnuts in the manifolds, they fit in there perfect and NO restrictiveness notr sammler size.
I got mine from Pep Boys, they were less than $10. They have a sleeve that fits into the manifold part and then they are tapered, to have the pipe fit over the end, easy. I had NO TROUBLE OBTAINING MINE. I beleive they came from Fel Pro. BUT don't quote me. I do not have the paperwork handy right now.
I know you are in CT, what about Pep Boys? They should be there. HQ is in PA.
But, the right part is available. I once had the wrong ones on this car. Yep, trouble and cracked manifold, too. Keep searching, the right part, fits perfect and is leak free and (Tom) no downsizing.
Really.

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

You need to look at the inside of the donut, Karl. There's a ridge there; plain & simple. Remove the ridge and it helps. Unless you've got a "special california donut", every other one I've seen (my originals, my friend's camaro's originals, and two junkyard 2.8's) has had the ridge inside.

88Maro, how did you hook the y-pipe up? Did you hook it to the catalytic convertor, and then the engine? If so, the weight of the cat (and cat-back) might be pulling down on the y-pipe and preventing a good seal- the y-pipe would be tilted. You'd need a friend to push up on the back of the y-pipe while you tighten the manifold-to-y-pipe studs.

Either that, or, did you tighten each of the two studs on each side evenly? If not, you might have ****ed the flange to the side, and you could be getting a leak that way.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

I went to Pep Boys and they said they didnt have it and they couldnt order it either. When i hooked up the y-pipe i held the back up with a jack so it didnt weigh it down. I also tightened the bolts evenly. but i wouldnt rule out either of those. Thanks for your help guys. I'll be visiting the junkyards tomorrow to see if i can find some there.

 

Bring a hacksaw!

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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!