Matched Tolerances — Cylinder head and full gasket set verified against Kubota D902 sequence variants before dispatch, preventing oversize mismatch during top-end rebuild.
Technical Specifications
| Parameter |
Value |
| Part Number |
7247453 |
| Product Type |
Cylinder Head |
| Cross-Reference |
7000463, 7247479, 7000464, 7247480 (reference only) |
| Machine Fitment |
D902, D902-E3B-BC-1, MT55, MT85 |
| Brand Compatibility |
Kubota, Bobcat |
| Condition |
New Aftermarket |
| Warranty |
3–12 months against manufacturing defects |
| Kit Contents |
Cylinder Head (7247453), Gasket Kit (7000463, 7247479, 7000464, 7247480) |
| Standards |
ISO 9001 |
Application Suitability
| Engine System |
Related Components |
| Cylinder Head Sealing |
Head gasket, valve cover gasket, intake and exhaust manifold gaskets |
| Top-End Overhaul |
Valve stem seals, head bolts, thermostat housing gasket |
| Combustion Chamber |
Piston crowns, cylinder bore surfaces, injector copper washers |
| Coolant Passage Integrity |
Thermostat seal, coolant port O-rings, water pump mating gasket |
Why a Complete Cylinder Head 7247453 Engine Rebuild Kit Stops the Bench From Collecting Dust
An engine sitting torn down waiting for the right gasket set is an engine that is not earning.
When the cylinder head arrives but the gasket set is incomplete, or when oversize grades from a previous rebuild do not match the new components, the shop floor becomes a parking lot. I have watched D902 engines sit on benches in the Middle East for days because a head gasket thickness did not match the piston protrusion after a prior oversize bore job. The cylinder head 7247453 engine rebuild kit eliminates that gap by shipping the head and its full matched gasket set together, so the top-end goes back together in one sequence [NEED_CITE: engine overhaul sequencing standards for compact diesel engines].
Combustion Sealing as a System, Not a Single Part
The cylinder head sits at the center of the D902 combustion sealing system. It mates against the block through the head gasket, seals the intake and exhaust ports through manifold gaskets, and contains coolant and oil passages that depend on precise surface flatness. When any one of these interfaces leaks, the diagnosis often points at the gasket, but the root cause traces back to warped mating surfaces or mismatched component grades across the top end.
Matching the Head to Your Specific D902 Build
The D902 and D902-E3B-BC-1 variants share the same base architecture but differ in emission-related hardware and internal clearances. A cylinder head machined for one variant may not seal correctly against the other if valve pocket depth or coolant port alignment varies. Before we ship this cylinder head 7247453 engine rebuild kit, we cross-reference the engine serial number against the variant-specific machining specifications. This step catches incompatibilities that a parts catalogue alone cannot [NEED_CITE: Kubota D902 serial variant identification procedures].
What the Machining Tolerances Mean on the Bench
Precision-machined mating surfaces on this cylinder head maintain gasket sealing against oil and coolant leaks under D902 operating temperatures. The included gasket kit uses high-temperature resistant materials rated for D902 combustion pressures across all five reference points. Each head undergoes pre-shipment pressure testing to verify sealing integrity and dimensional conformance. Surface flatness directly governs head gasket clamp load distribution — a deviation beyond specification concentrates stress on one cylinder, leading to localized gasket blowout under thermal cycling.
The Hidden Cost of Sourcing Head and Gaskets Separately
Purchasing the cylinder head from one supplier and the gasket set from another introduces a tolerance stack that neither party controls. The head may arrive within specification, and the gaskets may be correct for the engine model, but if the gasket thickness does not account for the head's actual deck height after machining, the assembled compression ratio shifts. In a desert workshop with the next shipment days away, that mismatch means a second teardown, a second round of cleaning and inspection, and another period of machine downtime [NEED_CITE: consequences of component mismatch in diesel top-end rebuilds].
What We Bring to This Rebuild
We produce selected part lines in our own facility and source the remainder from qualified ISO 9001-certified manufacturing partners, so both self-produced and sourced supply carry the same warranty terms. Eight product categories ship under one account, meaning the head, gaskets, valve seals, and head bolts all move as one consignment. Minimum order starts at one piece, so an emergency single-engine rebuild is never blocked by volume requirements. Our technical team verifies compatibility and grade confirmation against your engine serial number before dispatch. Sample supply is available for fitment confirmation before you commit to bulk stocking for your rebuild shop.
Documentation & Verification
- Commercial invoice and packing list itemizing head casting and all five gasket references
- Part compatibility and cross-reference sheet marked reference only for 7247453 and associated numbers
- Quality inspection record confirming machining tolerances and pressure test results per unit
- Warranty terms covering 3–12 months against manufacturing defects on head and gasket materials
- Packing photographs showing head protection and gasket kit sealing before crate closure
- HS code and customs documentation support for international engine parts shipment
Installation & Rebuild Sequence
- Verify block deck surface flatness before placing the new cylinder head 7247453 to prevent repeat gasket failure
- Clean all coolant and oil passages in the block to remove debris from the previous failure event
- Follow D902-specific torque sequence and angle values to ensure even clamp load across all cylinders
- Inspect head bolt stretch — replace bolts that exceed specification rather than reusing beyond yield point
- Pressure-test the cooling system after assembly to confirm no leaks at the head-to-block interface
- Run initial break-in at moderate load to seat the new head gasket under controlled thermal expansion
Share Your Engine Details for a Confirmed Fit
Send us your Kubota D902 engine serial number and any known rebuild history, including prior oversize work. If the nameplate is worn, a photograph of the block casting number or the old cylinder head part marking lets us verify the correct variant. We will confirm gasket kit completeness against your specific engine configuration before shipping.
Frequently Asked Questions
Q: What gaskets are included in the kit and does it cover a complete D902 top-end rebuild?
A: The kit includes the cylinder head plus gasket references 7000463, 7247479, 7000464, and 7247480 (cross-reference only), covering the head gasket, valve cover gasket, and manifold sealing points. For a complete top-end rebuild, you may also need valve stem seals and head bolts, which we can add to the same consignment upon request.
Q: How do I confirm this cylinder head fits my specific Kubota D902 engine serial variant?
A: Provide your engine serial number or a photograph of the nameplate. We cross-reference it against the D902 and D902-E3B-BC-1 variant specifications to confirm coolant port alignment, valve pocket depth, and gasket thickness compatibility before shipping.
Q: My engine was rebuilt before — how do I check whether STD or oversize components are needed?
A: Share your rebuild history or let us inspect photographs of the piston crowns and bore surfaces. If a previous rebuild used oversize pistons or a decked block, the gasket thickness must compensate. We confirm the correct grade before dispatch to avoid mismatch on the bench.
Q: What root causes should I investigate to prevent repeat head gasket failure?
A: Check the cooling system for restricted flow or thermostat malfunction, verify that head bolts were torqued to specification in the correct sequence, and inspect the block deck for warping. Addressing the cause rather than only replacing the failed part prevents the new gasket from suffering the same fate.
Q: Can I request a sample cylinder head to verify fitment before committing to a bulk order?
A: Yes. We supply sample units for fitment confirmation so your rebuild shop can verify port alignment, bolt pattern, and gasket mating before placing a larger stocking order. Contact our technical team with your engine variant details to arrange the sample.
