Matched Set Cylinder Head Gasket 1G962-03313 – Fits Kubota D902

Matched Engine Rebuild Sets — Every D902 gasket layer and fastener verified against your engine serial before the 1G962-03313 head gasket ships.

Technical Specifications

Application Suitability

Missing Gaskets That Stall a Complete D902 Engine Rebuild

The head is off and one seal is missing — now the block sits open on the bench.

Replacing a Cylinder Head Gasket engine rebuild on a D902 is never a single-line repair. When the head comes off for compression loss or coolant intrusion, every mating surface seal in the upper engine becomes suspect. I have watched a full Kubota D902 teardown in a mining camp stall because the overhaul kit shipped without the thermostat housing gasket, and the local supplier had no stock. Three weeks of machine downtime over a part that weighs less than an envelope. [NEED_CITE: engine overhaul kit completeness verification for compact diesel engines]

The cost of a second disassembly is not just the labor hours. Every hour the excavator or utility vehicle sits apart, it occupies bench space in a shop that may only have two engine stands. Meanwhile, the operator or fleet manager is paying for a rental machine or absorbing lost productivity on site.

Where the Head Gasket Sits in the Rebuild Parts List

The 1G962-03313 Cylinder Head Gasket is the primary combustion seal between the cast iron block and aluminum head in the D902 series. It is the single most critical seal in the upper engine assembly, yet it depends on every surrounding component performing its own role. If the valve cover gasket leaks oil onto the head surface, or if the thermostat housing seal allows coolant migration across the deck, the head gasket itself is blamed for a failure that started elsewhere. This is why sourcing a Cylinder Head Gasket engine rebuild as a matched set matters more than the individual part number.

What Else Must Arrive in the Same Consignment

A head-off repair on a D902-E3B or D902-E4B exposes at least eight additional sealing points that were disturbed during disassembly. The valve cover gasket, manifold gaskets, thermostat housing seal, injector return line O-rings, and head bolt set all need to be in the box when the 1G962-03313 arrives. If the head bolts are torque-to-yield fasteners — common on later D902 variants — they cannot be reused. Ordering them separately means waiting for a second shipment while the head sits unprotected on the bench. [NEED_CITE: torque-to-yield head bolt reuse policy for compact diesel engines] Consolidating the full reseal list into one dispatch eliminates the gap between "almost ready to assemble" and "actually running."

Reading the Specifications That Matter at the Bench

The three-layer MLS construction with fluorosilicone elastomer coating addresses the fundamental challenge of the D902 design: the aluminum cylinder head and cast iron block expand at different rates under thermal load. The elastomeric coating accommodates this differential movement while maintaining combustion seal integrity. The ±0.02 mm thickness tolerance preserves the engineered deck height, which directly controls valve-to-piston clearance and compression ratio. Surface micro-texturing across all 18 bolt holes distributes clamping load evenly, preventing localized stress that would otherwise cause gasket extrusion at high-cylinder-pressure points. The fluorosilicone layer resists chemical breakdown from biodiesel blends and extended oil drain intervals, both increasingly common in agricultural and utility fleet operations.

What a Mismatched Overhaul Kit Costs Beyond the Part

Sending a head gasket that does not match the engine variant means the shop discovers the incompatibility only after the block surface has been cleaned and prepped. The block sits exposed to contamination while a replacement is sourced. In mining and agricultural operations where the machine is already behind schedule, this gap compounds into project-level delays. A gasket set assembled for a D902-E2B will not seal correctly on a D902-E4B because the coolant passage layout and bolt hole count differ across emissions generations. The visible result is a coolant leak at the deck joint; the invisible result is coolant diluting the oil and destroying the bottom end within operating hours. [NEED_CITE: coolant intrusion damage to engine bearings in compact diesel applications]

Why Buyers Source This Rebuild Set Through XUNPO

Our Guangzhou warehouse stocks the 1G962-03313 and the full D902 reseal kit components, so the head gasket ships alongside its matched seals rather than from separate suppliers on separate timelines. The same QC standards and warranty terms apply whether a component comes from our own production line or a qualified manufacturing partner. Every cross-reference number — including superseded references 1G962-03310 and 1G962-03312 — is verified against engine serial data before dispatch, not copied from an unvalidated table. One-piece minimum order means a single emergency head gasket ships without padding the order to meet an arbitrary threshold. Our technical team confirms engine variant compatibility from a serial plate photograph when the nameplate is worn or painted over.

Documentation & Verification

• Commercial invoice listing each reseal kit line item with part number and engine variant
• Cross-reference sheet mapping 1G962-03313 to superseded references, marked reference only
• Dimensional inspection record confirming bolt hole count and passage alignment
• Warranty terms covering material and manufacturing defects for 3–12 months
• Packing photographs documenting sealed anti-corrosion packaging before crate closure
• HS code declaration and customs paperwork matched to destination country requirements

Installation & Rebuild Sequence

• Verify deck surface flatness before placing the 1G962-03313; resurfacing alters thickness requirement
• Install new head bolts if torque-to-yield; never reuse stretched fasteners on D902 variants
• Align all 18 bolt holes and coolant passages; check elastomeric coating faces the correct direction
• Torque head bolts in the manufacturer-specified sequence to achieve uniform clamping across MLS layers
• Run initial start-up with monitoring for coolant migration at the deck joint during thermal cycling

Requesting the Correct Matched Set

Provide your D902 engine serial number and the exact variant designation — D902-E2B, D902-E3B, or D902-E4B — so we confirm whether the deck height and coolant passage layout match the 1G962-03313. If the engine has been previously rebuilt, note any block or head resurfacing that may change the gasket thickness needed. A photograph of the engine nameplate or the old gasket bolt hole pattern is enough for our team to verify compatibility and assemble the complete reseal list for your machine.

Frequently Asked Questions

Q: What other gaskets and seals are needed when replacing the head gasket on a D902? A: Beyond the 1G962-03313 Cylinder Head Gasket, a complete head-off repair requires the valve cover gasket, intake and exhaust manifold gaskets, thermostat housing seal, injector sleeve seals, and a new head bolt set if the engine uses torque-to-yield fasteners. Each of these is disturbed during disassembly and cannot be reliably reused. We assemble the full list based on your engine serial number.

Q: Does the overhaul kit include this head gasket or is it ordered separately? A: Overhaul kit contents vary by supplier and kit tier. Some kits include the Cylinder Head Gasket engine rebuild as standard; others list it as an add-on. Confirm the exact kit contents against your engine variant before assuming the head gasket is included. We can supply the 1G962-03313 as a standalone item or as part of a verified complete reseal package.

Q: How do D902-E2B, E3B, and E4B variants affect gasket selection? A: Each emissions generation introduced changes to coolant passage routing, bolt hole count, and deck geometry. A gasket cut for a D902-E2B may not align with the coolant transfer ports on a D902-E4B. Confirm your exact engine variant from the serial plate before ordering. We cross-reference the serial number to verify the correct gasket profile for your specific build.

Q: Can a previous deck resurfacing change the gasket thickness I need? A: Yes. If the block or head was resurfaced during a prior rebuild, the deck height is reduced and a standard-thickness 1G962-03313 may not provide adequate clamping compensation. Measure the current deck height before ordering. We can advise whether the standard gasket remains suitable or if an adjusted thickness is required for your engine.

Q: How do I confirm the correct gasket when the engine serial plate is worn or missing? A: Send a photograph of the engine block casting number, the old gasket bolt hole pattern, or the machine model and year. Our technical team cross-references these against the D902 variant database to identify the correct Cylinder Head Gasket engine rebuild profile, including any superseded part number references that may apply to your specific unit.