Need help on exhaust manifolds, bolt size help

[weider1717]

On the drivers side I have everything loose but the air line that runs into the manifold and there is a small bolt in the middle of the manifold that is smaller than a 5/16 and slighty larger than a 8mm??

the 8mm feels about right but it slipped twice so I just stopped and a 7mm won't fit so I'm clueless?

I took my time with kroil and all and everything so far was easy nothing broke yet and I want to keep it that way!

also what size wrench do I need where that air line screws into the manifold it's an odd size too!

thanks for any help

[weider1717]

need help on this guys I have no clue what size wrench is needed for that air pump line or that bolt I think the bolt is an 8mm rusted down a bit but the part I need a wrench on nothing fits a 15/16" is a little too big.

also where hte air ling runs to the back of the block theres a connection there you have to break loose and same thing odd sizes tried it with crescents no luck.

[Keith Seymore]

Sounds like it might be 9/32" ( = slightly smaller than 5/16").

K

[weider1717]

was a no go also and where the smog air line is theres a connection point you have to break loose and it won't go for nothing! 2 10" cresents and every once I have and nothing. I let a my dad try it and he bull dicks stuff I should have known better he twisted the tubing.

I have no clue how to get anywhere with it lol

[mongoose]

heat it with a torch and hit it with a hammer/bar to make it a bigger size then pound down the socket on it so it's nice and tight.