Thread: Please help I am racking my brain on this one.

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On the assembly line at the Chevy V8 engine plant in Flint MI we used a product called Threebond. I’ve never seen it sold in parts stores any place, but that’s what GM used to seal the "China Wall.” (Tech, thats the first time I’ve seen that term used outside the assembly plant! It takes it’s name from it’s resemblance to, you guessed it, The Great Wall Of China). We also used guide pins to align the bolt holes in the intake with holes in the heads. The pins also held the gaskets in place. As was stated earlier, this only works with intakes with vertical bolt holes. The Threebond was applied, intake gaskets were set into place with the ends set into the wet sealer and the intake was set in place immediately. Engines that sat for more than five minutes (such as when the line was shut down for break time or lunch period) had the already applied sealer, (applied by a robot) removed and reapplied by hand prior to dropping the intake manifold. The engines were in the test stands and being fired up within 2 hours after assembly.