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Precision sealing for critical engine oil containment – The OEM D7505-1009001B Oil Pan Gasket is engineered to provide a permanent, leak‑free seal between the oil pan and engine block, preventing oil loss and contamination under all operating conditions. Designed for SINOTRUK Homan heavy-duty diesel engines, this gasket withstands extreme vibration and thermal cycling. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts.
The D7505-1009001B oil pan gasket is manufactured from high-grade silicone rubber with a steel carrier core, offering superior compression set resistance and a perfect fit even on imperfect sealing surfaces.
The D7505-1009001B oil pan gasket is a molded rubber composite gasket with a stamped steel carrier. Unlike traditional cork or paper gaskets, this design maintains its sealing force even after repeated thermal cycles from -40°C to +150°C. The silicone rubber material is resistant to all engine oils, diesel fuel, and coolant, providing a durable, non‑shrinking seal.
The integrated steel carrier prevents gasket extrusion under high bolt torque and ensures even load distribution across the entire flange surface. The gasket features locating tabs that align with the oil pan bolt holes, making installation simple and preventing misalignment. Each gasket is die‑cut to exact OEM specifications, with bolt holes reinforced by steel grommets to prevent tearing.
Unlike aftermarket gaskets that often leak after a few months, this genuine SINOTRUK Homan component is designed for the life of the engine. It can be reused once if removed carefully, but SINOTRUK recommends replacing the gasket every time the oil pan is removed for guaranteed leak‑free assembly.
Premium high-temperature silicone rubber with a steel carrier core, offering superior compression set resistance and a perfect seal against oil leaks.
Die‑cut to exact OEM contours, with locating tabs and reinforced bolt holes. Eliminates alignment errors common with cut‑your-own gaskets.
Withstands -40°C to +150°C and 20g vibration. No shrinkage, cracking, or loss of sealing torque over time.
| OEM Number | D7505-1009001B |
| Product Name | Oil Pan Gasket (Rubber with steel carrier) |
| Brand | SINOTRUK Homan |
| Material | High-consistency silicone rubber + stamped steel carrier |
| Hardness (Shore A) | 70 ±5 |
| Compression Set (22h/150°C) | ≤ 15% |
| Tensile Strength | ≥ 8 MPa |
| Elongation at Break | ≥ 300% |
| Temperature Range | -40°C to +150°C (continuous) |
| Fluid Compatibility | Engine oil, diesel, biodiesel (B20), coolant, water |
| Gasket Thickness (compressed) | 2.0 mm ±0.1 mm |
| Number of Bolt Holes | 22 (with steel grommets) |
| Bolt Hole Diameter | 10.5 mm (fits M10 bolts) |
| Steel Carrier Thickness | 0.5 mm (zinc-plated) |
| Locating Tabs | 4 integrated alignment tabs |
| Reusable | Yes – once, if not damaged (recommend replacement) |
| Compatible Engines | SINOTRUK WD615, WD618, MC11, MC13 |
The D7505-1009001B gasket is molded in a multi‑cavity tool that ensures consistent geometry across millions of parts. The silicone rubber is formulated with a proprietary additive package that resists oil absorption and swelling, maintaining its original thickness and sealing force for the life of the engine. The steel carrier is inserted during molding, not glued, creating an inseparable bond.
The gasket features raised sealing ribs (beads) on both sides, which concentrate clamping force into narrow contact bands. This increases surface pressure without requiring excessive bolt torque. The total bolt torque recommendation is 20-25 Nm, lower than traditional gaskets, which reduces the risk of warping the oil pan flange.
Around each bolt hole, a steel grommet prevents the rubber from being squeezed out and limits compression to 30% of the original thickness. This ensures that even if bolts are slightly overtightened, the rubber will not be damaged, and the seal remains intact.
The silicone rubber used in the D7505-1009001B is tested to MIL‑S‑23586 standards and is resistant to ozone, UV radiation, and salt spray. It does not harden or crack when exposed to high temperatures (150°C continuous) like many synthetic rubber gaskets. Even after 10 years of service, the gasket remains flexible.
The steel carrier is zinc‑plated with a trivalent chromate finish, providing 240 hours of salt spray protection. This prevents rust from migrating into the oil pan even if the rubber coating is accidentally scratched during installation.
Installing the D7505-1009001B is straightforward: 1) Clean the engine block and oil pan flanges thoroughly; remove all old gasket residue. 2) Ensure the flanges are flat (use a straightedge). 3) Place the gasket onto the oil pan, aligning the locating tabs with the bolt holes.
4) Apply no additional sealant – the gasket is designed to be installed dry. 5) Position the oil pan against the block, insert bolts, and torque in a crisscross pattern to 20-25 Nm. 6) Wait 1 hour before adding oil to allow the rubber to fully relax. The gasket is compatible with silicone RTV as a backup only if the flange is damaged (but this is not recommended).
Step‑by‑step procedure for a successful oil pan gasket replacement: 1) Drain engine oil and remove the oil pan. 2) Using a plastic scraper, remove all old gasket material from both flanges – do not use metal tools that could scratch the sealing surface.
3) Clean the flanges with brake cleaner and a lint‑free cloth. Inspect for warpage: place a straightedge across the pan flange; gaps larger than 0.5 mm require pan replacement. 4) Place the new D7505-1009001B gasket onto the oil pan, aligning the locating tabs with the bolt holes.
5) If the gasket has a printed “THIS SIDE UP” mark, ensure it faces the engine block. 6) Lift the pan into position and start all bolts by hand. 7) Torque bolts in three passes: first to 5 Nm, then to 12 Nm, finally to 20‑25 Nm in a crisscross pattern from the center outward.
8) Do not retorque after heat cycling – the silicone rubber will settle naturally. 9) Refill with oil and run the engine for 10 minutes, then inspect for leaks. 10) Re‑check oil level after the engine has cooled.
The D7505-1009001B gasket is maintenance‑free. However, if an oil leak appears at the pan rail, first check that the pan bolts are tight (20-25 Nm). Overtightening can distort the pan and cause leaks; undertightening can also cause leaks. If the gasket is damaged during installation (torn or misaligned), it must be replaced. The gasket can be reused once if removed carefully, but SINOTRUK recommends a new gasket every time for guaranteed reliability.
Common causes of gasket failure: using RTV sealant on a dry‑fit gasket (can cause hydraulic lock and forcing the gasket out), overtightening bolts (squeezes the rubber out from the carrier), or a warped oil pan. Always verify pan flatness before installation. Never start the engine without oil after pan installation.
The D7505-1009001B oil pan gasket is manufactured under IATF 16949 and ISO 9001:2015 certified processes. Each batch is tested for Shore hardness, tensile strength, and compression set. Random samples undergo oil immersion testing (150°C for 168 hours in SAE 15W‑40), thermal cycling (-40°C to +150°C for 1000 cycles), and vibration testing (20g, 10-2000 Hz for 100 hours).
The gasket also passes a 500-hour salt spray test (ASTM B117) and a 200,000-mile simulated life test on a hot engine dynamometer. All materials are RoHS and REACH compliant. A lot number is printed on the gasket package for traceability. Counterfeit gaskets often use inferior ACM or NBR rubber that hardens quickly, lacking the steel carrier and raised sealing beads.
A fleet of 550 SINOTRUK HOWO trucks in Brazil (high humidity and rough roads) experienced chronic oil pan leaks with aftermarket gaskets. After switching to the D7505-1009001B genuine gasket, the leak rate dropped from 18% per year to less than 1%. The gaskets remained leak‑free for over 500,000 km.
Another user – a mining company in Mongolia operating in extreme cold (-45°C) – reported that the silicone gasket did not become brittle or shrink, while rubber and cork alternatives failed within weeks. The genuine gasket maintained sealing torque even after dozens of thermal cycles.
Each genuine D7505-1009001B oil pan gasket is sealed in a plastic bag and packed in a branded SINOTRUK Homan carton. The box includes a QR code for authentication. The gasket itself has a molded OEM number and a colored dot indicating production batch.
Counterfeit gaskets often lack the steel carrier, have irregular bolt hole spacing, or are made from shiny black rubber (real silicone has a matte finish). The genuine gasket has a faint steel core visible at the edges. Always scan the QR code before installation. Using a fake gasket can result in oil leaks, engine damage, and voided warranty.
Summary: The SINOTRUK Homan Oil Pan Gasket (OEM D7505-1009001B) delivers a reliable, long‑lasting seal for heavy-duty diesel engines. Eliminate oil leaks and protect your engine with this genuine OEM component – trusted by fleets and mechanics worldwide for perfect fit and leak‑free performance.
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