Nissan Cylinder Head YD25-B assembly 8 port early non common rail. Glow plugs on the ex side. 171331
171331This cylinder head fits the early Nissan YD25 171331engine with the 8-port layout and glow plugs on the exhaust side. It sits in place without any odd adjustments and works well when the old head has cracks, heat damage, or uneven compression. Workshops often choose this assembly because it saves time during rebuilds and keeps the engine running the way it should. It’s a straightforward replacement for anyone fixing the older YD25 setup.
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This cylinder head assembly suits the Nissan YD25 early engine — the version that uses the 8-port design with glow plugs on the exhaust side. If you’ve worked on these engines before, you already know how common head issues become once overheating or hard mileage sets in. When the surface goes out of shape or cracks show up between the valves, the engine starts losing power. This assembly is made for those situations.
The head sits on the block without needing special work. Bolt holes line up cleanly, and the ports match the early-type intake layout. In most cases, workshops use it during full top-end rebuilds where sealing and airflow matter the most. Another thing worth noting is that this version works with the older non-common-rail setup, so it suits vans, utes, and off-road vehicles still running the early YD25.
A few practical points:
- Fits the early YD25 engine with the 8-port intake
- Glow plugs sit on the exhaust side, same as the factory design
- Good choice when repairing overheating damage or uneven compression
- Works well for complete engine rebuilds and long-term maintenance
Most mechanics prefer a clean, ready-to-mount head instead of repairing a worn one. It saves time and avoids repeat issues later. When installed with proper torque steps and new gaskets, this head usually brings the engine back to smooth running.
At Acme Impex, every casting goes through a quality check before dispatch. We look at machining lines, surface finish, and port alignment so workshops don’t lose time during fitting. If you need a dependable assembly for an older YD25, this one sits right in place and supports a solid rebuild.