Mitsubishi/Kobelco 6D16 VS Hyundai 6D16 Cylinder Head: Core Differences, Fitment & Buying Guide
The 6D16 diesel engine is widely used in Kobelco excavators, Mitsubishi Fuso trucks, and Hyundai construction machinery. Many customers and repair shops mistakenly interchange these two cylinder heads because they share the same “6D16” name. This leads to fitting failure, oil leaks, overheating, poor performance, and short service life.
Although Hyundai’s early 6D16 engine was based on Mitsubishi’s licensed technology, Hyundai has made many modifications to the cooling system, oil passages, mounting holes, and intake/exhaust ports. This guide shows you the key differences and helps you choose the RIGHT cylinder head for your machine.
1. 5 Key Differences Between Two 6D16 Cylinder Heads
Mitsubishi / Kobelco 6D16
OE Part Numbers:
ME997756, ME997431, ME403382
Cooling System:
Thick water jacket, strong heat dissipation for heavy-duty work
Intake Port:
Curved design, better high‑speed power
Mounting Holes:
Standard Mitsubishi position, fits original parts perfectly
Material & Compression:
High-density cast iron, 17:1 compression ratio
Hyundai 6D16 (D6BT)
OE Part Numbers:
Hyundai custom code, no “ME” prefix
Cooling System:
Narrow optimized passage, matches Hyundai engine tuning
Intake Port:
Straight design, better low‑speed torque
Mounting Holes:
Slightly offset, extra oil holes, does NOT fit Mitsubishi
Material & Compression:
Special cast iron, adjusted compression for D6BT
2. Fitment: Which Cylinder Head Fits Your Machine?
✅ Mitsubishi / Kobelco 6D16 Cylinder Head Fits
- Kobelco Excavator: SK220-3, SK220-4, SK220-6, SK320, SK330-6, SK330-6E, SK350-6E, SK290LC-6E
- Kobelco Crane: 7055, 7070, TK350, TK550
- Mitsubishi Fuso Truck: FK / FM Series
- Other: Kato HD1430 Excavator
✅ Hyundai 6D16 (D6BT) Cylinder Head Fits
- Hyundai Excavator: R210-5, R215-7, R215-9, R225-7, R225-9
- Hyundai Truck: HD72
- Hyundai Wheel Loader: HL730
3. Important Buying Tips (Avoid Mistakes)
1. Check your engine model first
Kobelco SK Series = Mitsubishi 6D16
Hyundai R Series (21 ton+) = Hyundai D6BT
THESE TWO ARE NOT INTERCHANGEABLE.
2. Turbo vs Naturally Aspirated
Turbo version (6D16T) has reinforced exhaust seats.
Never replace a turbo head with a non-turbo one.
3. Quality We Supply
✅ OEM Replacement: CNC machined, 100% pressure tested, 12-month warranty
✅ Upgraded Version: Polished ports, strengthened cooling for mining use
⚠ Warning: Many cheap “universal 6D16 heads” crack within 3–6 months. Our products are strictly separated for Mitsubishi and Hyundai.
Need a Quotation or Correct Part Number?
Leave your machine model + engine serial number, we reply within 24 hours.
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