Nissan YD25 4-Port 2.5L Cylinder Heads & Engine Parts (2005–2015)

Looking for a premium aftermarket replacement Nissan YD25 4-port 2.5L turbo diesel cylinder head? We supply brand-new complete heads, gasket sets, and internal engine components from premium Australian stock with rapid nationwide delivery.

The Nissan YD25 2.5L engine (Navara D40, Pathfinder R51) is a common workhorse across Australia, but severe heat stress or cooling system failures frequently lead to cracked heads. Common symptoms of a failed YD25 head include blowing bubbles into the radiator overflow bottle, mysterious coolant loss, or excessive cooling system pressure.

Fitment Note (Thai vs. Spain Builds): This is the 4-port intake runner design, which represents almost all YD25 sales in Australia. This cylinder head perfectly suits all Thai-built models and the 4-port Spain-built models. Please note that it does not suit the less common 8-port Spain build. If you are unsure which version your vehicle requires, please speak to our team before ordering!

Why Choose Midland Cylinder Heads?

• Australian-Assembled Quality: Every brand-new cylinder head is built and inspected to strict OEM specifications by our licensed technicians, with all valve depths pre-set during assembly.
• Thickest MLS Gaskets: Our kits feature high-grade multi-layer steel (MLS) head gaskets engineered to ensure maximum clearance and perfect compression sealing.
• Included Torque Specs: We include correct tightening sequences and torque specifications with every order to ensure a perfect installation.
• 12-Month Warranty: Drive with peace of mind with our 12-month, unlimited-kilometre warranty on all parts.
• Fast Dispatch & No Core Exchange: Units are sold completely outright (no need to send your old head back) with fast dispatch from our Perth and Melbourne hubs.

Our Parts Summary

• Brand New Assembled Cylinder Head: Premium replacement unit supplied with brand new valves and valve springs professionally fitted and vacuum-tested.
• Premium Head Gasket Set with Bolts: Comprehensive thick-grade multi-layer steel (MLS) head gasket set with all required seals, injector washers, and new high-tensile head bolts.

If you need technical help, want to confirm your vehicle’s build origin, or want to check stock, call John directly on 0406 611 288. Please note we are parts specialists only—we do not provide mechanical vehicle fitting.

Browse YD25 2.5L Parts

Nissan Navara 2002- 2015 with YD25 2.5 Ltr Diesel Common Rail Cylinder Head
Machine the face of your cylinder head. Please note that the valves must be set to a specific value below the cylinder head face. When you machine or surface your head, the valves move closer to the front, which may cause them to hit the pistons. If the valve depth is not within specification, we may be unable to machine the face without reseating the valves. From $243.00
Recondition your cylinder head. If your cylinder head has failed, bring it to us. We will inspect it and provide a quote for the repair. From $760.00
This is a brand-new, assembled cylinder head. It features a fully assembled YD25 cylinder head with fully installed camshafts and shim-tappet clearance. The head also includes a VRS gasket set, head gasket, and head bolts and is ready for installation. This cylinder head is compatible with the four-inlet-port engine used in all Nissan Navara and Pathfinder models manufactured in Thailand and Spain between 2005 and 2015. To help you identify the four-port cylinder head, note that the glow plugs are on the passenger side of the engine, specifically on the exhaust manifold side. Sale price $1310.00 Order online or by phone. Pickup available in Perth (Midland) or fast dispatch from Melbourne.
This is a new YD25 assembled cylinder head. It has valves and camshafts fitted with a shim-tappet clearance set. The gasket set and head bolts are included. It fits the eight-inlet port engine in the Nissan Navara D40M and Pathfinder R51M, both manufactured from 2010 onward and made in Spain. To help you identify the eight-port cylinder head, the glow plugs are situated on the driver’s side of the engine, on the inlet manifold side. $1480.00 Order online or by phone. Pickup available in Perth (Midland) or fast dispatch from Melbourne.
Vrs Cylinder Head Gasket Set with the head bolts featuring the thickest head gasket for compatibility with all models. Fits YD25 Four Port Cylinder Head Order online or by phone. Pickup available in Perth (Midland) or fast dispatch from Melbourne. $226.00
Vrs Cylinder Head Gasket Set with the head bolts featuring the thickest head gasket for compatibility with all models. Fits the YD25 Eight Port Cylinder Head $258.00 Available for online or phone orders. Fast dispatch from Melbourne.
Fits the Navara D22 and D40 Thailand Build with the Plastic Cover. Includes Rocker Cover Gasket & Injector Tube Seals *Excludes Injector Nozzle Line Seals Available for online or phone orders. Fast dispatch from Melbourne. $210.00
It fits the Navara D40 Spain Build and Pathfinder R51 up to 1/10 with a plastic cover. Includes Rocker Cover Gasket, Injector Tube Seals & Oil Filler Cap * Excludes Injector Nozzle Line Seals Available for online or phone orders. Fast dispatch from Melbourne. $258.00
Fits the Navara D40 Spain Build and Pathfinder R51 From 1/10 on Includes Rocker Cover Gasket, Injector Tube Seals & Oil Filler Cap * Excludes Injector Nozzle Line Seals Available for online or phone orders. Fast dispatch from Melbourne. $215.00