Isuzu 4be1 Engine Repair Manual -

For a diesel mechanic, this is the most referenced section. It includes:

Lito limped to the bench and flipped to . He ran his finger down the list. “Engine knocks: (1) Injection timing advanced. (2) Loose flywheel. (3) Worn valve guide.” He stopped at number four, scribbled in his own handwriting: “Check the shims under the injector nozzle holders. A cracked shim mimics a rod knock.” Isuzu 4be1 Engine Repair Manual