Aluminum Cylinder Head for Nissan YD25DDTI YD22DDTI Turbo Diesel Engines

Product NO.

ML NO.	OEM NO.	REF NO.
MLG051A	11040 5M300 11040 5M301 11040 5M302 11040 BN360	908505
MLG051B	11039 EC00A 11039 EB30A 11040 EB30A 11040 EB300 11040 EC00C	908510
MLG051C	11040 5X00A	908527
MLG051D	11040AW400 11040AW401	908507
MLG051E	110408H800 110408H802 11040AW802	908508

Product Information Cylinder Head

1. Product Overview

Nissan’s YD series diesel engines — YD25DDTi (2.5L) and YD22DDTi (2.2L) — are high-performance inline-4 turbocharged diesel engines used in SUVs, pickups, vans, and commercial vehicles. Both feature DOHC 16-valve aluminum alloy cylinder heads, with VP44 mechanical or common-rail (CRDi) fuel systems, depending on the market and year.

2. Technical Specifications

Item	YD25DDTi	YD22DDTi
Displacement	2.5L (2488cc)	2.2L (2184cc)
Valvetrain	DOHC, 16 valves	DOHC, 16 valves
Head Material	Aluminum Alloy	Aluminum Alloy
Fuel System	VP44 / CRDi	Primarily VP44
Turbocharged	Yes	Yes
Emission Standards	Euro 3–5	Euro 3
Timing	Timing Chain	Timing Chain
Cooling System	Water-cooled	Water-cooled

3. OEM Cylinder Head Numbers

YD25DDTi:

11039-5X00A – Early VP44 version
11039-5X01A – Common Rail version
11039-EC00A / EC00B – Updated casting for CRD
11039-VK525 / VK526 – Reinforced high-performance version
11039-EB70A – Late-model NP300

YD22DDTi:

11039-8H800
11039-8H801
11039-8H802
11039-BN300 – CRD version for X-Trail / Almera
11039-BN30A – Newer casting

4. Compatible Vehicles

Model	Engine	Notes
Nissan Navara D22/D40	YD25	Pickup / Ute 2002–2015
Nissan Pathfinder R51	YD25	SUV, 2005–2012
Nissan NP300 / Hardbody	YD25	Africa, Asia, LATAM markets
Dongfeng Rich	YD25	China domestic pickups
Nissan X-Trail T30/T31	YD22/YD25	Diesel trims 2001–2013
Nissan Almera / Bluebird Sylphy	YD22	EU diesel variants
Nissan Serena (C24)	YD22	MPV 2001–2006
Nissan Primera / AD	YD22	European 2.2 Di/Dci versions

5. Product Availability

Option	Details
Bare Head	Casting only, no internals
Semi-Complete Head	Includes valves, guides, springs
Fully Assembled Head	Camshafts, lifters, valves pre-installed

✔ Precision-machined sealing surfaces
✔ Pressure-tested cooling jackets
✔ Suitable for OEM replacement & rebuild kits

6. Installation Notes

Use new MLS head gasket and new torque-to-yield (TTY) bolts
Thoroughly clean oil and coolant passages before installation
Ensure proper injector seat sealing – replace copper washers
Check timing chain tensioner & guides during service
Confirm EGR ports and swirl chamber compatibility for CRD versions
After reassembly, bleed cooling system and prime oil before starting

7. Common Cylinder Head Problems & Repair Advice

Problem	Symptom	Cause	Recommended Fix
Cracked Cylinder Head	Overheating, white smoke	Weak castings (early YD25), excessive load	Use reinforced heads (e.g., VK525); always replace head bolts
Injector Blow-by	Ticking, smoke, black injector seats	Worn copper washer or seat erosion	Reface seat, install new washers with correct torque
Camshaft Journal Wear	Noise, misfire, loss of power	Oil starvation, dirty oil	Replace cam or complete head; clean oil channels
Coolant Mixing with Oil	Milky oil or sludge	Internal crack or EGR cooler leak	Pressure test head & cooler; replace head or gasket
Valve Seat Recession	Misfire, poor compression	Low-quality fuel, long hours	Resurface valve seats or replace head

8. Key Export Markets

Asia: Philippines, Thailand, Indonesia, China
Africa: Nigeria, Kenya, South Africa, Egypt
Europe: UK, France, Spain, Germany
Latin America: Chile, Bolivia, Colombia, Peru
Middle East: Iraq, UAE, Saudi Arabia
Oceania: Australia, New Zealand