Re: 51 Packard Exhaust Manifold Fix??

Posted by Tobs On 2012/7/16 6:15:34

Hi Gary, and welcome to packardinfo. Your intake manifold does look pretty nasty indeed. Soak the nuts holding the manifolds on the block for a day or two with your favorite penetrating oil before removing, but the studs and nuts are usually in good shape and won't break. (Hope you have good luck like I have had in the past)
There are 2 nuts near the center of the manifold that hold it to the block, they are a pain to reach, but the others are pretty easy to remove.
My intake manifold was also rotted similar to yours. 2bbl 327 or 288 intakes are cheap and plentiful. You might try ross or flackmaster for a good used example. Or post a wanted add in the forsale forum here.
IF the heat deflector in the ex manifold is stuck or also corroded, you might want to get both in/ex manifolds.

You then can take both (new) manifolds to a machine shop and have them mill the mating surfaces true so everything seals nicely afterwards.

Oh, the three bolts holding the two manifolds together may/will be worse for wear. Soak them liberally, and be prepared that they give you trouble. Removing the two manifolds as a unit is usually an easy job though.
Best regards, and glad to have you on the forum.
Mike