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Isuzu 4JG2-SV Cylinder head assembly Inlet valve 40.10mm

Isuzu 4JG2-SV Cylinder head assembly Inlet valve 40.10mm 171011

171011 https://www.acmeimpex.com.au/web/image/product.template/14609/image_1920?unique=dd33328
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The Isuzu 4JG2 SV Cylinder Head Assembly 171011 suits engines that start losing compression or show cracks around the ports. The head sits well on the block and lines up cleanly with the 4JG2 layout, so installation feels straightforward for most workshops. The inlet valve setup (40.10 mm) matches the original design, which helps the engine breathe properly once everything goes back together. Mechanics often choose this assembly when they want a clean base to rebuild the top end without dealing with worn seats or uneven surfaces. It’s a solid option if you want the engine to run smoothly again without hunting around for multiple parts.

$ 850.00 850.0 AUD $ 850.00

$USD 868.00

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The Isuzu 4JG2 SV Cylinder Head Assembly 171011 works for anyone rebuilding a 4JG2 diesel that has started to show the usual head issues—cracks near the precups, coolant loss, or uneven compression across cylinders. The head comes prepared for installation, and most shops appreciate that it sits flat and doesn’t need extra corrections before fitting.

The inlet valve size—40.10 mm—follows the standard 4JG2 setup, so airflow stays close to what the engine expects. That matters on these engines because even a small mismatch can affect starting and mid-range pickup. With this assembly, the ports line up neatly, and the gasket surface comes clean, which helps reduce time spent preparing the head before torquing it down.

Another thing worth noting is how well it suits day-to-day workshop needs. Many technicians prefer having a head they can unpack and mount without worrying about hidden casting flaws or odd fitment. If the old head overheated or warped, this replacement usually gets the engine back to stable running with less trial and error.

Why buyers choose this assembly

  • Fits the Isuzu 4JG2 SV engine layout correctly
  • Inlet valve size (40.10 mm) matches original specs
  • Helps solve common issues like cracked heads and compression loss
  • Clean mating surfaces support proper sealing and easier installation
  • Useful for full rebuilds, fleet maintenance, and direct repairs

In most cases, installing this head restores smoother idle, better combustion, and more consistent performance on vehicles using the 4JG2 engine. Workshops, rebuilders, and vehicle owners pick it when they want a straightforward fix that works with the engine’s original setup.

Acme Impex follows standard casting and machining checks before dispatch, so you get a part that sits right and supports a stable rebuild. If you're repairing a tired 4JG2 engine, this cylinder head assembly gives you a practical way to bring it back to working condition without complications.