in PDF format. Avoid files that are only a few megabytes, as these are typically marketing brochures.

If your vehicle features a 6-cylinder Isuzu engine from the same era (often found in larger F-Series trucks), you are likely looking for the workshop manuals. If your truck is an Elf or N-Series (NKR, NPR), it most likely houses the 4-cylinder 4HF1, 4HG1, or 4HE1 engine. Isuzu 4HF1 Engine Specifications

A 700+ page document covering everything from engine assembly to fuel system troubleshooting is available at the Isuzu Club Manual Download .

The is actually an inline 4-cylinder diesel engine, not a 6-cylinder model. If you are specifically looking for a 6-cylinder workshop manual, you may be referring to the related Isuzu 6HK1 or 6HE1 models, which are often grouped within the same "H-Series" engine family manuals. Isuzu 4HF1 Engine Key Specifications

Cylinder head, piston, crankshaft, camshaft, timing gears.