Looking for 3911273 Cummins 4BT cylinder head? Factory direct supply for 3.9L engines. Reinforced cast iron prevents thermal cracking. Fits Case 580. Request a quote today!
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The Cummins 4BT cylinder head (OEM: 3911273) is a reinforced HT250 alloy component designed for 3.9L 8-valve engines.
It addresses thermal cracking issues and fits Cummins Case 580 Backhoes and Komatsu PC120-6 excavators.
In stock for global export.
Upgrade your Cummins 4BT/4BTA diesel engine with Ruich Value’s premium cylinder head, engineered for unmatched durability and performance. Featuring stainless steel valves, enhanced port design, and precision engineering, this component is ideal for Jeep, light trucks, and industrial equipment.
| Specification | Value |
|---|---|
| Product Type | Cylinder Head |
| Material Grade | HT250 Reinforced Alloy Cast Iron |
| Valve Count | 8 Valves (2 per cylinder) |
| Combustion Chamber Type | Direct Injection (8V) |
| Surface Finish | Mirror Machined (0.05mm Flatness) |
| Pressure Tested | 100% Hydraulic Leak Tested |
| Valve Seat Material | High-Nickel Heat-Resistant Alloy |
| OEM Reference | 3904531 |
| Cross Reference | 3966448, 3904543, 3911273 |
| Typical Applications | Case 580K, Komatsu PC120-5, Freightliner MT35, Hyster H150 |
| Model | Model | Model | Model |
|---|---|---|---|
| NTA855 (Assm) | ISF2.8 | ISX15/QSX15 | 6BTAA |
| K19 (Assm) | ISF3.8 (Assm) | ISLe (Assm) | 6CT/6CT (Assm) |
| 4B/4BT (Assm) | ISDe/QSB/ISB 4.5 | QSL | 6L/6LT (Assm) |
| 6B/6BT (Assm) | ISDe 6.7 / QSB6.7 (Assm) | ISM11 | QSB3.3/B3.3 (Assm) |
| ISB6 E3/E3 (Assm) | QSB 5.9L | ISG | ISL/T375 |
| ISBe 5.9 (Assm) | ISC (Assm) |
A1: Symptom: Cracking between valve seats and coolant oil intermix. Diagnosis: This is often caused by extreme heat cycles, particularly in 4BT “swaps” (Jeep/Toyota) where cooling systems may be undersized for the 3.9L displacement. Solution: Our replacement heads feature increased wall thickness in the coolant passages and HT250 alloy material to prevent thermal stress fractures under high-load conditions.
A2: Pro-Tip: The 4BT head must be torqued in three stages, finishing at 170 Nm (125 ft-lb). Technical Detail: Block flatness must be within 0.003″ (0.076mm). Always use new torque-to-yield head bolts; reusing old bolts can result in loss of clamping force, leading to repeated head gasket failure in turbocharged 3.9L applications.
A3: Diagnosis: Standard 4-cylinder heads suffer from valve seat recession during continuous high-load operations in agricultural or marine use. Our Solution: We use induction-hardened high-nickel alloy seats. This specific material chemistry ensures the 3911273 head maintains proper valve lash settings and seal integrity even when running high Exhaust Gas Temperatures (EGT) for extended periods.
We’re committed to delivering top-tier engine components. If you have any questions or inquiries about our Cummins 4BT 3.9L Cylinder Head, please don’t hesitate to contact us. Our team is ready to assist
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