The rear oil seal is the final barrier protecting your engine’s precious lubricant from escaping into the environment, and its integrity is paramount for long-term engine health and reliable operation. The 1001994648 rear oil seal from HOWO is engineered to deliver exceptional sealing performance, superior wear resistance, and a precise factory fit, ensuring that your engine remains oil-tight and protected against contamination. As a critical Howo/Sitrak truck parts component, this rear crankshaft oil seal is manufactured from high-grade, heat-resistant rubber compound with a precision-machined metal casing, featuring advanced lip geometry and a garter spring that provides consistent sealing pressure against the rotating crankshaft. Whether you are performing a major engine overhaul or replacing a leaking seal, the 1001994648 guarantees a perfect factory fit, reliable sealing, and extended engine life – making it the trusted choice for professional workshops and fleet operators worldwide.
The rear oil seal, also known as the rear main seal, serves as the primary barrier preventing engine oil from escaping at the point where the crankshaft exits the engine block to connect to the transmission. The 1001994648 is specifically designed to withstand the high rotational speeds, extreme temperatures, and continuous oil exposure encountered in heavy-duty diesel engines. A failing rear oil seal can lead to oil leaks, low oil pressure, and potential damage to the clutch, flywheel, and transmission – costly repairs that can be avoided with proper maintenance. HOWO has engineered this seal with a precision-molded lip that maintains constant contact with the crankshaft, supported by a high-tension garter spring that ensures a consistent sealing force regardless of operating conditions. The seal’s robust construction and high-quality materials provide outstanding resistance to oil degradation, heat aging, and mechanical wear. With the 1001994648, you eliminate oil leaks, protect your engine components, and maintain the cleanliness and integrity of your vehicle’s powertrain.
Leak-Proof
Zero Seepage
Heat Resistant
Up to 150°C
OEM Fit
Exact Match
Durable
Premium Compound
The 1001994648 rear oil seal is manufactured to the highest OEM standards, incorporating advanced material science and precision engineering. Below are the complete technical specifications for this essential engine sealing component.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 1001994648 | Exact Match |
| Part Name | Rear Oil Seal (Rear Main Seal) | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / MC11/MC13 | Crankshaft rear sealing |
| Material | Fluoroelastomer (FKM) with steel casing | Oil & heat resistant |
| Inner Diameter | 90 mm | Precision-sized |
| Outer Diameter | 110 mm | Standard housing fit |
| Width | 12 mm | Optimal sealing contact |
| Lip Material | FKM with PTFE coating | Low friction, wear-resistant |
| Garter Spring | Stainless steel, high tension | Constant sealing force |
| Temperature Range | -40°C to +150°C | Extreme duty |
| Oil Resistance | Excellent (FKM) | Prevents swelling |
| Weight | 0.15 kg | Lightweight |
| Warranty | 12 Months | Manufacturer Guarantee |
The 1001994648 rear oil seal is produced using advanced compression molding and precision machining techniques to ensure exceptional dimensional accuracy and sealing performance. The fluoroelastomer (FKM) sealing lip is formulated to provide outstanding resistance to high temperatures and the chemical attack of engine oil additives, maintaining its elasticity and sealing ability over extended service intervals. The PTFE coating on the sealing lip reduces friction against the rotating crankshaft, minimizing wear and ensuring long-term reliability. The seal’s integrated garter spring provides constant radial tension, compensating for minor shaft runout and ensuring a consistent seal throughout the operating life. The steel outer casing provides a rigid, interference-fit installation that prevents the seal from moving or leaking, even under high oil pressure conditions. Each seal is inspected for dimensional accuracy, lip integrity, and spring tension, guaranteeing that the 1001994648 meets HOWO’s stringent quality standards. This meticulous engineering ensures that your rear crankshaft remains sealed, your oil stays in the engine, and your vehicle remains clean and environmentally responsible.
The 1001994648 rear oil seal is specifically designed for HOWO heavy-duty trucks equipped with MC11 or MC13 engines, including T7H, A7, and derivative models. It directly replaces the original seal with identical inner diameter, outer diameter, and width dimensions, ensuring a straightforward installation without modifications. The seal is compatible with the factory crankshaft and flywheel housing, and it works seamlessly with the original equipment flywheel and clutch assembly. This rear oil seal is also compatible with many Sinotruk and other commercial vehicles that share the same engine architecture. To confirm fitment, always cross-reference the OEM number on your existing seal with 1001994648. If they match, this component will integrate seamlessly. Keeping this seal in your spare parts inventory ensures that you can quickly address oil leaks at the rear of the engine, minimising downtime and protecting your clutch and transmission from oil contamination.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
MC11/MC13
Engine Series
Direct Replacement
No Modifications
Replacing a worn, hardened, or leaking rear oil seal with the 1001994648 immediately restores the integrity of your engine’s oil system. The new seal eliminates oil leaks, preventing low oil pressure conditions and protecting the clutch, flywheel, and transmission from contamination. The superior sealing performance ensures that engine oil remains where it belongs, maintaining proper lubrication for the engine’s rotating and reciprocating components. The FKM lip and PTFE coating provide excellent resistance to heat and wear, extending the service life of the seal and reducing the frequency of costly repairs. The garter spring ensures that the seal maintains constant contact with the crankshaft, even as the seal lip wears, providing long-term leak protection. For fleet operators, a reliable rear oil seal reduces the risk of oil leaks, lowers maintenance costs, and helps maintain the cleanliness and reliability of your vehicles. By investing in the 1001994648, you ensure that your HOWO engine remains sealed and protected, mile after mile.
Installing the 1001994648 rear oil seal is a critical procedure that should be performed with care and precision. Begin by safely supporting the vehicle and removing the transmission and flywheel to access the rear of the engine. Thoroughly clean the crankshaft sealing surface and the seal housing bore, removing any dirt, old sealant, or burrs. Inspect the crankshaft surface for grooves or scoring; if damaged, the crankshaft may need to be repaired or replaced. Apply a thin layer of clean engine oil or assembly lube to the sealing lip of the new seal. Position the new seal into the housing bore, ensuring that it is square and properly aligned. Use a seal installation tool or a large socket of the correct diameter to press the seal into the housing until it is fully seated and flush with the housing face. Reinstall the flywheel, clutch, and transmission, torquing all fasteners to the manufacturer’s specification. Refill the engine with the correct oil, start the engine, and check for any leaks. Periodically inspect the seal for signs of leakage during routine maintenance. With proper installation, the 1001994648 will provide years of reliable sealing.
Pro Tip: When installing the new rear oil seal, always use a seal installation tool to ensure that the seal is driven in straight and square. Installing the seal at an angle can damage the lip and cause premature failure. The 1001994648 is a precision component; proper installation is essential for optimal performance.
Genuine HOWO components are engineered to the highest standards, and the 1001994648 rear oil seal is no exception. Aftermarket seals often use inferior rubber compounds, weaker spring tension, or imprecise dimensions, leading to leaks, premature wear, and potential engine damage. HOWO’s seal is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 1001994648, you benefit from HOWO’s rigorous testing, including temperature cycling, oil resistance, and wear testing. This ensures that the seal meets the demanding requirements of heavy-duty trucking. Moreover, genuine parts are backed by a comprehensive warranty and supported by HOWO’s global network, giving you confidence in your purchase.
OEM Authentic
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which vehicles use the 1001994648 rear oil seal?
A: The 1001994648 is designed for HOWO T7H, A7, and other models with MC11/MC13 engines, as well as many Sinotruk trucks with the same engine architecture.
Q: What are the symptoms of a failing rear oil seal?
A: Oil leaks from the rear of the engine, oil spots on the ground, a burning oil smell, low oil level warnings, and oil contamination on the clutch or flywheel are common indicators.
Q: Can I replace the rear oil seal without removing the transmission?
A: No, replacing the rear oil seal requires removing the transmission, flywheel, and clutch to access the rear of the crankshaft. This is a labor-intensive procedure that should be performed by a qualified technician.
Q: How do I verify the correct part?
A: Check the OEM number on your existing seal. If it matches 1001994648, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 1001994648 Rear Oil Seal today! Explore our complete selection of genuine HOWO and Sinotruk engine sealing components at Howo/Sitrak truck parts and keep your engine oil secure and leak-free.
The 1001994648 Rear Oil Seal from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine’s oil system remains sealed and protected, preventing costly leaks and maintaining optimal lubrication. Whether you are a professional mechanic or a fleet manager, this rear oil seal offers the performance, durability, and exact fit that you can rely on. Trust HOWO – the benchmark for excellence in heavy-duty truck components – and experience the difference that genuine quality makes.
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