Walnut blasting?

Yes, that’s right, it’s an eco-friendly and cutting-edge technique to clean carbon deposits from the intake valves on most BMW turbo engines with direct injection. This method uses fine walnut shells blasted at high pressure to safely remove the buildup without harming engine components. An efficient alternative to traditional cleaning methods, offering a non-abrasive solution that restores engine performance and efficiency. The process involves removing the intake manifold to access the intake valves, and then blasting the deposits away. The result is a cleaner engine with improved airflow and performance, especially helping those rough cold starts.