bolt size

I need to know the size of the bolts that fasten the riser elbow to the exhaust manifold. I think they come it to sizes two longer ones and two short ones. I need to replace them as i will replace the old gasket and the bolts are kind of frozen in there (already broke one, and left it in teher). So I'd like to finally replace that gasket and bolts. Any ideas on how to remove the bolt or how to make the new threads for the new bolts?

Use a mig welder and weld a nut to it. Back it out while it's still hot.

Use a dab of never seize on the replacement.

Matt

Could someone show pics of the tools needed to pull out the broken bolt out of the thread as some technical words are hard for me to translate. I will also post tonight some pictures of the manifold situation, they are rusted in place where it conect the the cylinder heads, I think i will also remove them, and probably will have some more wroken bolts!!! but anyways whats the size of all the bolts involved in this task?

you can see why i need to replace the gasket



and this is the rust in the bottom of the manifold. pictured is the worst of the ports 3rd cylinder from drivers side



scary huu

Kalpa, Don't worry about the rust on the bottom of the manifolds, they all rust up like that. I haven't seen a paint yet that will not burn off of there within a few hours of running. I used high temp disk brake caliper paint and it didn't last, the factory applied paint is no better. I would bet powder coating would fair no better. Clean them up the best you can, shoot them with a quick coat of high temp caliper paint and slap them back on. Your already taking care of the important part by replacing the riser gaskets.