Hi Weshope: All is not lost even though this bug outfit did you some ill deeds. I have looked through my books and it is difficult to find any diagrams showing the cooling tin. The parts you are talking about can be found in the CIP1 catalogue which is available by clicking on their advertisement in this site. Go to the site and enter " engine tin " in the search. Look for part # C13-8948. These are the lower sections that bolt onto the lower edge of the engine case ( oil pan ) You can see two of these tapped holes on each side of the casting. The right side is two piece, the left is one. The other sides bolt onto the heat exchangers. The upper part of the curve bolts onto the upper front engine tin. If you have all of the bits it fits together in a very logical pattern. ALL of this tin is important for keeping your engine running cool. As for the cooling louvres there is a flat joining rod under the opening for the cooling fan on the " dog house " It joins the driver's side ( cyl. 3 and 4 ) louvres to the passenger's side ( Cyl. 1 and 2 ) louvres. If you pull toward you on the 1and2 side the louvres open on both sides. If you push away the louvres close. The thermostat accomplishes this. As mine is a summer only car I have wired open my cooling louvres and have never had trouble with my engine. If the thermostat system was ultra reliable I might consider attaching a thermostat. I have more to fear from overheating an engine than I do from running a bit cool and paying the price with higher gas consumption. Check out part # VWC 113198 100 This shows a whole cooling tin set. With the larger pieces in place the smaller pieces will fill in the holes until the whole unit is shrouded. Try to find a local VW club or check out a meet where a lot of owners get together. Where abouts do you live? There should be people near you who share your interest and who will not rip you off. As for your 1776, the only way that I would be able to tell the size would be to remove the head and mike the inside diameter of the cylinder bore. Nothing externally can give you that information especially if the rebuilder has already jerked you around. The stock pistons are ( I believe ) 85.5 mm and the 1776CC are 90mm. I may stand corrected on that one.
When your project is underway, register your convertible on the international Beetle convertible registry in Germany. The multilingual web site is at TYP15.com. MY72BUG is entry #330. Good luck with the project. If I find any better pictures of cooling tin I will let you know. Dan ( MY72BUG) in Goderich, Ontario, Canada
I'd rather have a partial bottle in front of me than a partial frontal lobotomy.