11106-PR4-013 Sealing (28Mm) Bolt - Overview. The 11106-PR4-013 sealing (28mm) bolt is a critical component used in Honda marine engine systems. This part plays a vital role in providing a watertight seal within the engine, especially around the cylinder block oil pan, helping to prevent oil leaks and maintain engine integrity. Designed for compatibility with various Honda and Acura models, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key