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Not to panic. The head WILL come off . . . it's just stuck a little. The head removal tool will do the trick. Since you can get one from Anthony, you're in good shape. You can also make one pretty easy from a piece of steel plate drilled with a hole in the center, and a spark plug base (with the porcellin broken off) with a length of threaded bar welded into it. I've even heard of some people dropping some rope down into the appropriate cylinder on the compression stroke, then pushing the car forwards in 4th gear so the piston comes up pushes on the rope which then pushes the head up.

DO NOT UNDER ANY CIRCUMSTANCES USE ANY KIND OF PRYBAR UNDER THE HEAD.

DO NOT UNDER ANY CIRCUMSTANCES USE ANY PART OF THE CAMS OR CAM JOURNALS AS LIFTING DEVICE ATTACH POINTS.

Now for the lecture . . . . . Alfa's do not suffer hamfisted mechanics well at all. They will punish you.

If you had read Pat Braden's Alfa Romeo Owner's Bible, you'd have known to stuff some rags down in the chain well, so that WHEN (not "if") you dropped the chain links, you'd be able stop them before then fell into the oil sump.

Make sure you clean the head studs up real good and put some anti-sieze compound on them. Be VERY careful when you clean the mating surfaces on the block and head. Aluminum scratches easily. Make sure the head is perfectly flat via the use of a mechanics level (probably need to take it to a machine shop). Also, be sure to tell them what the minimum thickness of the head is and where it's measured at. You may need to have the machinist mill it.

When you get the head back on, follow the directions for torquing the head down exactly. Also make sure you fill the oil troughs for the cams with fresh oil before you refit the cam cover.
 

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Sounds like you have a pretty neglected Alfa there. Be sure to clean everything you see down there. A wire brush on a grinder motor and some steel wool will help alot. Wire brush those fuel lines so you can see how much damage rust has done. It might only be superficial. The walls of the tubing are pretty thick since they have to hold about 300 psi. Be careful not to kink or bend the tubing. When you put everything back together use a bit of anti-sieze compound so they won't be so hard to get off in the future. From my experience, some people really crank down way too hard on the fuel line fittings and they become virutally frozen to the point you have to use a vice and breaker bar to loosen them. While you're at it, you ought to clean up that SPICA pump real good.
 

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Does anybody doubt the value of cleaning the studs well and treating them with anti-seize compound when refitting the head? What's that about dissimilar metals reacting to one another. . . .
 
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