Complete Assembly Dispatch — Every cylinder head for CAT 3044C / C3.4 ships with valves, springs, and guides pre-installed, matched to engine serial variant so rebuild shops avoid oversize mismatches mid-teardown.
Technical Specifications
| Parameter |
Value |
| Part Number |
179-1854, 233-5500 |
| Product Type |
Cylinder Head |
| Cross-Reference (reference only) |
179-1854, 233-5500 |
| Machine Fitment |
236B, 236B3, 242B3, 246B, 246C, 248B, 252B, 252B3, 256C, 257B3, 259B3, 262B, 262C, 262C2, 267B, 268B, 272C, 277B, 277C, 277C2, 279C2, 287B, 287C, 287C2, 289C2, 297C, 906, 906H, 907H, 908, 908H |
| Assembly State |
Complete with valves, springs, guides, retainers, and spring seats |
| Material |
Cast iron alloy (ASTM A48 Class 30) |
| Valve Seat Runout Tolerance |
≤0.02 mm |
| Gasket Surface Finish |
Ra ≤1.6 μm |
| Valve Spring Load |
325 N at 38 mm installed height |
| Pressure Test |
12 bar for 5 min |
| Condition |
New Aftermarket |
| Warranty |
3–12 months against manufacturing defects |
| MOQ |
1 piece |
| Standards |
ISO 9001, ASTM A48 Class 30, ISO 8528-1 |
Application Suitability
| Engine System |
Related Components |
| Complete engine overhaul (3044C / C3.4 / C3.4 IND) |
Head gasket set, head bolts, valve stem seals, timing components |
| Top-end rebuild for cracked or warped head failure |
Cylinder block inspection, piston ring set, connecting rod bearings |
| Scheduled replacement in high-utilization fleets (12+ hr/day) |
Full gasket kit, coolant system flush components, thermostat |
Why Rebuild Shops Delay the First Fire After a Cylinder Head Swap
A complete cylinder head for CAT 3044C C3.4 engine rebuild arrives ready to bolt on — no separate sourcing of valves, springs, or guides from secondary suppliers.
When I was procuring for a fleet in Indonesia, we ordered what we thought was a full cylinder head assembly. It arrived bare — no valve guides, no retainers. The block sat open on the stand for two weeks while we chased matched components across three different vendors. That teardown clock doesn't stop ticking while you wait. Shops working on CAT C3.4 / 3044C engines encounter this gap regularly: the head is listed as "complete" in one catalog and "bare" in another, and the internal tolerances of reused components undermine the entire rebuild. [NEED_CITE: cylinder head assembly completeness standards for diesel engine overhaul]
Combustion Chamber and Valvetrain System Integration
The cylinder head sits at the center of the combustion and valvetrain system. It interfaces directly with the head gasket, cylinder block deck, intake and exhaust manifolds, and the full valve actuation train. Supplying this Cylinder Head as a complete assembly means every internal component — valve guides, retainers, spring seats — is dimensionally matched from the same production batch. This eliminates the tolerance stacking that occurs when a rebuild shop mixes new and salvaged valvetrain parts.
Engine Serial Variants and Oversize History
The CAT 3044C, C3.4, and C3.4 IND designations share a common block architecture but differ in internal component specifications across production runs. A cylinder head casting may carry the same base reference number yet house different valve guide bore diameters or spring seat configurations depending on the engine serial prefix. Before confirming an order, the engine serial number must be cross-checked to verify whether the unit requires standard or oversize valve guides — especially if a previous rebuild already moved the block to a non-standard grade. [NEED_CITE: engine serial variant identification for CAT C3.4 family]
Reading the Specification Sheet for Real-World Impact
The cast iron alloy meets ASTM A48 Class 30, providing the thermal stability needed for continuous-duty combustion chambers operating under sustained load in quarry and demolition environments. The valve seat runout tolerance of ≤0.02 mm ensures concentric sealing between valve face and seat — when this dimension drifts, combustion gases erode the seat edge and compression loss follows within a few hundred operating hours. Gasket surface finish held at Ra ≤1.6 μm provides the sealing texture required for multi-layer steel head gaskets without over-compressing the gasket bead. Valve spring load specified at 325 N at 38 mm installed height prevents valve float at peak RPM under the continuous duty cycles typical of skid steer loaders and compact track loaders running 12-hour shifts.
The Hidden Cost of Mismatched Grades During Rebuild
Installing a standard-bore cylinder head onto a block that was previously rebuilt with oversize valve guides creates interference at the guide bore — the head won't seat correctly, or worse, it appears to fit but distorts the guide under torque, leading to premature valve stem wear and oil consumption. The machine goes back to work, fails within a month, and gets torn down again. This double-rebuild cycle costs more in labor and lost machine availability than verifying the oversize grade before the first order. [NEED_CITE: diesel engine rebuild tolerance stacking and repeat failure analysis]
Why Source This Cylinder Head Through XUNPO
Own production lines and qualified sourced supply operate under one account and one warranty, so a cylinder head and its mating gasket set ship from a single quality-controlled pipeline. Eight parts categories mean the head gasket, head bolts, valve stem seals, and timing components for a full top-end job consolidate into one shipment. Single-piece minimum order applies — no forced bulk when one machine is down. Guangzhou warehouse stock on common configurations supports fast dispatch for standard builds. The technical team verifies compatibility against engine serial number, production variant, and any documented oversize history from prior rebuilds. Cross-reference verification covers superseded and alternate numbers across the 179-1854 and 233-5500 identifiers.
Documentation & Verification
- Commercial invoice and packing list referencing both cross-reference numbers and engine serial variant
- Part compatibility sheet confirming 3044C / C3.4 / C3.4 IND fitment (reference only)
- Quality inspection record covering pressure test, valve lift, and surface flatness measurements
- Warranty terms specifying coverage period against casting and assembly defects
- Packing photographs showing valve protection and port sealing before crate closure
- HS code and customs documentation support for international engine parts shipments
Installation & Rebuild Sequence
- Verify block deck flatness and bore grade before placing the Cylinder Head onto the cylinder block
- Install new head bolts with specified torque sequence — do not reuse stretched fasteners from prior teardowns
- Confirm valve stem seal installation on each guide before fitting the intake and exhaust manifolds
- Torque manifold fasteners in sequence and check for port alignment against the head casting
- Prime the lubrication system and verify coolant flow before initial startup to prevent dry-running damage
- Run a graduated break-in cycle, monitoring compression and coolant pressure throughout the first operating hours
Confirm Your Engine Build Before Ordering
Provide the engine serial number, the specific variant designation (3044C, C3.4, or C3.4 IND), and any records of previous oversize work. This information allows the technical team to confirm guide bore size, spring seat configuration, and gasket surface compatibility before the head leaves the warehouse.
Frequently Asked Questions
Q: Does this Cylinder Head ship fully assembled or as a bare casting?
A: This assembly includes all valves, valve springs, guides, retainers, and spring seats pre-installed and tested. It arrives ready for installation onto a prepared block — no additional valvetrain component sourcing is required. Shops receive a matched set rather than mixing new and salvaged parts.
Q: My engine had oversize valves installed during a previous rebuild — will this head accept them?
A: Standard assemblies are configured for standard-bore valve guides. If your block was previously rebuilt with oversize valves or guides, provide the engine serial number and rebuild records so the correct guide bore diameter can be confirmed before shipment.
Q: How do I determine whether my engine is a 3044C, C3.4, or C3.4 IND?
A: The engine serial number plate identifies the exact variant. The 3044C, C3.4, and C3.4 IND share block architecture but may differ in valve guide bores and spring configurations across production runs. Share the serial number for verified cross-reference confirmation.
Q: What other components should be replaced together with this cylinder head?
A: A complete top-end rebuild typically requires a new head gasket set, head bolts (which stretch during torque and should not be reused), valve stem seals, and a thermostat. Ordering these as a consolidated kit prevents split shipments and mismatched lead times.
Q: What commonly causes cylinder head failure, and how do I prevent it from recurring?
A: Overheating from coolant system degradation, sustained detonation from injector faults, and head bolt relaxation over extended service intervals are the most frequent root causes. Addressing the cooling system and injection timing during the rebuild prevents repeat cracking or warping. [NEED_CITE: root cause analysis methods for diesel cylinder head failure]
