This manual covers the Detroit Diesel 16V 4000 series diesel engines, specifically models 16V 4000 G21, G41, G61, and G81. These powerful diesel engines are engineered for demanding industrial and heavy-duty applications, renowned for their robust construction and reliable performance. The 16V 4000 series represents a commitment to advanced diesel technology, designed to deliver exceptional power output and efficiency in challenging operational environments.

The purpose of this spare parts catalog is to provide comprehensive information for identifying and ordering replacement components for your Detroit Diesel 16V 4000 engine. It details various sub-assemblies and individual parts, ensuring that you can maintain the optimal performance and longevity of your engine. This catalog is an essential resource for owners, service technicians, and parts distributors to facilitate accurate part selection and streamline maintenance and repair processes.