I think the issue is that the cooling system fittings were pressed in and glued at the factory. After a certain number of heat cycles they let go and welding them in is the fix.
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Originally Posted by Seadweller
Indeed, the Mezger engine is one of the appealing characteristics of the car. I believe the GT-2 and GT-3 share the same block as well. Regarding the cooling lines, my buddy's car recently dumped the coolant, and is in the shop as I write this to get the fittings re-welded. It was an engine-out repair as mentioned.
Perhaps Hemming's is overstating the appreciation of the 996TT. I'd love to have both but can't add another car to the stable without letting something go. I'd love a GT-3, but they're a full $30K more than the 996TT.
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