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Hi, new to the forum. I have an Audi tt rs. Engine was vibrating. Took it to the dealer. They took the head off and found that a bolt from the manifold came loose and bounced around the cylinders and destroyed the engine. Has anyone ever heard of this. Only 40,000 km on the car. Out of warranty. Audi is not fixing. Bolt bounced around the cylinders and destroyed it. You can see one bolt. There should be 2.