Engine 4JJ1 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document is a workshop manual section for the Isuzu 4JJ1 diesel engine. It provides service instructions and specifications for repairing and rebuilding engine components. The manual covers topics such as engine assembly, cylinder head, camshaft, crankshaft, and other internal engine parts. Instructions include removing, inspecting, and installing various engine systems and components.