My Exhaust question

[jon440x]

I have a 94 b 3000 4x4 . On the passanger side where the manifold connects to the y pipe .......... is there suposed to be sealent between the two flanges that bolt together ?

My cab is filling with exhaust and i dont realy like it. the exhaust was falling off my truck for a while only held on by the last hangger and the y pipe where it bolts onto the manifolds. till the passanger y pipe came apart from the manifold. so i fixed all the hangers and put a split flange on the y pipe and stuck some bolts in it and called it done

i am hopping that i need to put sealent in the join and it will fix the leak. i hope i do not need to replace the gasket on the manifold and the motor. if it was leaking there wouldnt you see blowby ?

the thing is i do not see where it is leaking from ugh

 

[Trent w]

i just did my Exhaust today there is suppose to be like a lead donut there to stop leaking

 

[rboyer]

I'm having the same problem with an F250 that I just bought. There is supposed to be a donut gasket that seals the two mating surfaces and mine is gone. I was under there today hollowing out my... err... i mean doing exhaust work when I realized that it was leaking from there and actually contemplated just welding it shut but figured that i'd just hold off until I get more free time since the bolts looked pretty clean. If you are leaking from a flange and the bolts look clean, then do it the right way, otherwise weld it up! Jack the thing up so that you can get under it, support it with jackstands, start the motor and feel around. If the leak is that hard to find, what I normally do is have someone cover the exhaust with a welding glove or something to create enough back pressure to make the leak stand out a little more. And since welding gloves come in pairs you can put the other glove on your hand so that you don't burn yourself while feeling around for the leak!

 

[jon440x]

Update ......... i went to the local ford shop and asked for the gasket that goes in there they told me that there wasent a gasket it is just a compression fitting. So i went home and had a hard look at it today with a flashlight >>>>> i found the problem the gasket is blown out .... i took the bolts out and will replace the gasket tomorrow. I will probbly do the other side as well .......

Thanks for the replys