Exhaust Manifold Bolts

[Don Z.]

I could use some help determining if I have the correct attaching bolts/nuts for my 1966 327-300 with A.I.R. I cannot find in any books that I have or the AIM, how the attachment is. My exhaust manifolds look as if they have bolts only on the ends and nuts ( apparently on studs) on the center 4. Does anyone know if this is correct or should it be 12 bolts??? Paragon shows a kit that has 8 short bolts/4 long bolts, is this correct?? As always, I appreciate any help. Don Z.

[Gene M.]

Re: Exhaust Manifold Bolts

Don, the corect configuration uses all bolts with circular head markings.

[Don Z.]

Re: Exhaust Manifold Bolts

Thanks Gene...I thought they probably should be bolts, but I guess I probably did not have the right research material. The bolts that are there have the double circle on them. Thanks again Don Z.

[Christopher R.]

Re: Exhaust Manifold Bolts

When you go to put these back on, check your AIM. On other years, some of these bolts took those thick washers. Some didn't. Consider the use of antiseize on the bolts, because you might want to get them out some day. Finally, retorque them after a few run cycles.

[Don Z.]

Re: Exhaust Manifold Bolts

Thanks Chris for the comments. I had not thought of the antiseize...good idea. One of the reasons I asked the questions about bolts is I cannot find it in my AIM. I have been thru the book page by page and cannot seem to locate. Chris or anyone do ya know which page ? thanks

[John H.]

Re: Exhaust Manifold Bolts

You won't find the spec in the A.I.M., as the exhaust manifolds were installed at the engine plant; the torque spec for them is in the Service Manual.