Re: Exhaust Manifolds will not fit

Posted by flackmaster On 2008/12/30 23:15:26

...actually there were two part number changes, and Packard then spec'd the later manifold design as the service replacement. I believe this was covered in the service bulletins, point being, what is missing in the picture is the longer stud with the butterfly washer to make the later manifold fit on the earlier engines.

My personal theory on cracked exhaust manifolds is due more to overtightening and malfunctioning (stuck in the closed position) exhaust manifold heat valves than poor design. Just my opinion.