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Nissan Cylinder Head TB45 semi assembly 171327

171327 https://www.acmeimpex.com.au/web/image/product.template/14640/image_1920?unique=253c9d5
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The Nissan TB45 Cylinder Head Semi Assembly (171327) suits engines that start losing compression or develop cracks around the chambers. It fits the TB45 setup without fuss and sits correctly once the head surface lines up with the block. Many workshops use this type of semi assembly when they want a head that comes ready for final fitting and doesn’t slow down the rebuild. It helps bring the engine back to smooth running, especially in vehicles that work under heat or heavy load.

$ 1,750.00 1750.0 AUD $ 1,750.00

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The Nissan cylinder head for TB45 engines (171327) is built for technicians who deal with head damage, overheating marks, or sealing issues on older TB-series motors. The casting sits clean and straight, so it fits onto the block without the usual struggles you get with worn or repaired heads.

Most mechanics choosing a semi assembly prefer having a base that’s already prepared, because it cuts down the fitting time. This head works well for that. It carries the right seat positions, clean ports, and the TB45 layout that matches factory alignment. Once you drop it onto the block, the surfaces meet evenly, which makes the rest of the build go smoother.

Another thing worth noting: TB45 engines often crack around the chambers when they run hot for long periods. This replacement helps solve that, especially when the original head is beyond repair. Many workshops also choose this head simply because it avoids the uncertainty of welding or patch repairs.

What Makes This Head Practical for Technicians

  • Fits the TB45 engine layout without unnecessary adjustments.
  • Smooth seating areas help the head gasket sit properly.
  • Works well for engines dealing with overheating damage or compression drop.
  • Semi assembly format saves time during rebuilds.
  • Suitable for everyday workshop jobs and long-term fleet maintenance.

In most cases, once this head is installed with fresh internals, the engine settles into a stable idle and picks up better under load. That’s the main reason rebuilders choose a new head instead of repairing an old one.

Acme Impex checks casting quality and machining accuracy before dispatch, so every head reaches the workshop clean and ready for final assembly. If you're rebuilding a TB45 engine and want a part that fits straight and works without drama, this semi assembly makes the job easier and helps the vehicle get back on the road sooner.