Caterpillar 3406B Loaded Cylinder Head | 7W0006 | Square Port | New

New aftermarket loaded cylinder head for Caterpillar 3406B diesel engines, casting 7W0006 — square exhaust port. Manufactured by DCW, this head ships fully loaded with the complete valve train installed — ready to complete with your injectors. It fits square-port 3406B engines only. It replaces Caterpillar 7W0009, 7W2200, and 1105096.

Key Features:

• New aftermarket loaded cylinder head for Caterpillar 3406B, casting 7W0006 (square exhaust port)
• Ships fully loaded — valves, springs, retainers, and valve locks installed
• Includes valve guides and valve seats installed
• Replaces Caterpillar 7W0009, 7W2200, 7W2233, and 1105096
• New aftermarket assembly that restores factory specification; no core charge

Specifications:

• Base part number: 7W0006 (7W-0006) — Caterpillar casting
• Casting family: 7W0006 / 7W0009 / 7W2200
• Component type: Complete (loaded) cylinder head
• Port style: Square exhaust port
• Valve configuration: valves and springs installed (loaded)
• Included components: valves, springs, retainers, valve locks, guides, seats (installed)
• Condition: New — Aftermarket (DCW); no core charge
• Material: high-strength, alloyed cast iron
• Engine make: Caterpillar
• Engine model: 3406B

Compatibility / Fitment:

• Fits Caterpillar 3406B diesel engines with SQUARE exhaust ports
• Square-port only — if your engine has ROUND exhaust ports, you need a 3406C head; the 3406B (square) and 3406C (round) heads are not interchangeable
• Covers 3406B engine serial prefixes including 11N, 1DL, 1SJ, 3ZJ, 41Z, 45P, and 6TB
• Loaded head — includes valves and springs (standard, not Inconel), with guides and seats installed; injectors not included
• Verify your engine serial prefix and confirm square vs. round exhaust ports before ordering

Conclusion:

The Caterpillar 7W0006 is a new aftermarket loaded cylinder head for 3406B square-exhaust-port engines, shipped fully loaded with the complete valve train installed and ready for your injectors, with no core charge. Because the 3406B (square port) and 3406C (round port) heads are not interchangeable, confirm your engine has square exhaust ports and verify your serial prefix before ordering.