Matched Set Dispatch — cylinder head and full gasket kit verified against your D902 engine serial before shipment
Technical Specifications
| Parameter |
Value |
| Part Number |
1G687-03022, 1G68703022, 1G826-03040, 1J094-03040, 1G82603040, 1J09403040, 1G962-03045, 1G96203045, 1G962-03040, 1G962-03046, 1G962-03042, 1G96203040, 1G96203046, 1G96203042, H1G90-03040, H1G9003040, 1J025-03040, 1J02503040, KEACK-1G962, KEACK1G962, KEACK-H1G90, KEACKH1G90, KEACK-1J025, KEACK1J025, 1G82399354, 1G823-99354, 1G96099363, 1G960-99363, 1G96099364, 1G960-99364, 1G96099365, 1G960-99365, 1G96299363, 1G962-99363, 1G96299365, 1G962-99365 |
| Cross-Reference |
1G687-03022, 1G826-03040, 1J094-03040, 1G962-03045, 1G962-03040, H1G90-03040, 1J025-03040, KEACK-1G962, KEACK-H1G90, KEACK-1J025, 1G823-99354, 1G960-99363, 1G960-99364, 1G960-99365, 1G962-99363, 1G962-99365 (reference only) |
| Product Type |
Cylinder Head / Overhaul Gasket Kit |
| Machine Fitment |
D902, D902-E2B, D902-E3B, D902-E4B, D902-ET02, D902-7D2255 |
| Assembly State |
Complete cylinder head with full gasket kit |
| Material |
ASTM A48 Class 35 gray cast iron (cylinder head) |
| Head Gasket Type |
Multi-layer steel (MLS) with embossed stainless-steel stopper layers and Viton-coated sealing beads |
| Coolant/Oil Passage Positional Accuracy |
±0.02 mm |
| Condition |
New Aftermarket |
| Warranty |
3–12 months against manufacturing defects |
| MOQ |
1 piece |
| Standards |
ISO 9001 |
Application Suitability
| Engine System |
Related Components |
| Cylinder Head Assembly |
Valve train components, valve stem seals, valve guides |
| Top-End Gasket Sealing |
Exhaust manifold gasket, rocker cover gasket, thermostat housing seal |
| Coolant Circulation |
Thermostat, coolant hoses, water pump seal |
| Combustion Chamber |
Pistons, piston rings, cylinder liners |
| Lubrication Circuit |
Oil filter, crankcase breather, front and rear crankshaft seals |
Why the Same Kubota D902 Engine Needs Different Gasket Contents
A Kubota D902 cylinder head and gasket kit engine overhaul rebuild must be verified against the specific engine serial number, not just the base engine family.
An engine teardown often reveals damage that extends beyond the failed component. The D902 family spans variants from D902-E2B through D902-E4B, each with distinct internal configurations. A cylinder head casting might physically bolt on, but the gasket kit contents — coolant passage alignment, oil gallery seals, valve cover gasket profile — differ between builds. Shipping a generic kit to a job site means the machine sits idle while the correct seals are back-ordered. [NEED_CITE: engine variant identification protocols for compact diesel rebuilds]
Top-End Sealing Integrity Across the D902 System
This Kubota D902 cylinder head and gasket kit engine overhaul rebuild addresses the top-end as a sealed system. The cylinder head deck surface is ground to flatness tolerance, and the multi-layer steel head gasket features Viton-coated sealing beads rated for sustained combustion pressure. When these components arrive as a matched set, the sealing interface between head, gasket, and block is controlled from one source.
Variant-Specific Gasket Contents and Engine Serial Verification
The D902 family includes variants like D902-E3B-WDDE-3 and D902-E4B-SKL-1, where internal coolant routing and oil gallery positions shift between production runs. A gasket kit that fits one variant may leave a passage unsealed on another. Before dispatch, the full overhaul kit contents are checked against the engine serial number to confirm every seal, gasket, and O-ring matches the specific build. [NEED_CITE: diesel engine serial number tracking for parts compatibility]
Material and Tolerance Specifications That Affect Rebuild Outcomes
The cylinder head is cast from ASTM A48 Class 35 gray cast iron, selected for thermal stability under repeated heat cycling. The head gasket uses multi-layer steel construction with embossed stopper layers that maintain clamp load as the engine expands and contracts. Coolant and oil passage alignment is held to ±0.02 mm, preventing internal cross-contamination that would otherwise go undetected until coolant appears in the oil or vice versa. These tolerances matter because a head gasket failure is rarely just a gasket problem — it is often the result of accumulated deck distortion or passage misalignment that a replacement gasket alone cannot correct.
The Cost of Skipping Serial Number Verification
Sending a cylinder head and gasket kit based on the D902 base designation alone leads to fitment issues that surface only after the head is torqued down. Coolant weeping from a misaligned passage, compression loss from an incorrect gasket profile, or oil gallery leakage discovered during the first heat cycle — each scenario means the head comes back off, the gasket is scrapped, and the machine waits again. [NEED_CITE: consequences of incorrect gasket kit selection in diesel overhaul]
Sourcing From One Account With Verified Compatibility
Production on selected lines and qualified sourced supply ship under one account and one warranty. Eight categories of engine and machine parts consolidate under a single order. Minimum order is one piece, so a single emergency rebuild is not blocked by volume requirements. Guangzhou warehouse stock enables fast dispatch on common D902 items. Part identification is available from number, machine model, photograph, or nameplate image. Cross-reference verification covers superseded and alternate numbers. Sample supply is available for fitment confirmation before bulk commitment. The technical team confirms compatibility and grade based on engine serial and rebuild history.
Documentation & Verification
- Commercial invoice and packing list matching your D902 kit contents line by line
- Part compatibility and cross-reference sheet marked reference only for OEM numbers
- Quality inspection record covering head flatness and passage alignment
- Warranty terms covering both cylinder head and gasket kit under one claim
- Packing photographs showing kit contents before crate closure
- HS code and customs documentation support for international engine parts shipment
Installation & Rebuild Sequence
- Verify cylinder head deck flatness against block surface before gasket placement
- Clean all coolant and oil passages in the block to prevent contamination
- Torque head bolts in manufacturer-specified sequence to achieve even clamp load
- Confirm valve train geometry after head installation to avoid interference
- Run initial break-in cycle under load to seat MLS gasket stopper layers properly
Request a Matched Kit Quotation
Provide your D902 engine model variant, engine serial number, and any previous rebuild history so the correct gasket thickness and head specification can be confirmed. If the nameplate is worn or painted over, a photograph of the engine block casting numbers or valve cover profile allows identification. The response will include the complete kit contents list matched to your specific build.
Frequently Asked Questions
Q: What exactly is included in the full gasket kit for my specific D902 variant?
A: The kit contents depend on your engine serial number and variant designation. A typical kit includes the head gasket, valve cover gasket, exhaust manifold gasket, thermostat housing seal, injector seals, and all associated O-rings. Provide your D902 variant and serial number so the exact contents list can be confirmed against your engine build before dispatch.
Q: My D902 engine has been rebuilt before — how do I confirm the correct gasket thickness?
A: Previous rebuilds may have used oversize components or non-standard head gaskets. Provide the engine serial number and any records from the last overhaul. The technical team will cross-reference the build configuration and confirm whether standard or alternate thickness gaskets are required for your specific cylinder head and block combination.
Q: Are the cylinder head and gasket kit matched as a set, or sourced separately?
A: Both components ship as one verified set under a single warranty. The cylinder head deck surface and gasket profile are checked for compatibility before dispatch, so the sealing interface is controlled from one source rather than relying on separate suppliers to align on tolerances.
Q: What other engine system components should be inspected during this top-end overhaul?
A: Valve stem seals, valve guides, thermostat, coolant hoses, and oil filter should be inspected or replaced during a top-end rebuild. Piston rings and cylinder liner condition should also be assessed. A complete job list can be quoted together so all components arrive in one consignment.
Q: How do I identify my exact D902 engine serial number if the nameplate is worn?
A: Send a photograph of the engine block casting numbers, valve cover profile, or any visible stamped identifiers. The technical team can cross-reference these against production records to confirm your exact D902 variant and match the correct cylinder head and gasket kit contents.
