8981581100 Crankshaft Front Oil Seal For 4JB1 And 4JJ1 Engine Front Main Oil Seals
The 8981581100 crankshaft front oil seal is a front crankshaft seal used in Isuzu 4JB1 diesel engines (also compatible with some 4JJ1 models). It is primarily installed at the front of the crankshaft to prevent engine oil leakage and to block dust and impurities from entering the engine. This high-quality seal is made of oil-resistant and heat-resistant rubber, maintaining excellent sealing performance even under high engine temperature and speed conditions. It is a common and essential replacement component during engine maintenance, overhaul, and oil leak repair.
| Part Number |
8981581100 |
| Type |
Crankshaft Front Oil Seal |
| Installation Location |
Crankshaft Front End |
| Material |
Oil-resistant, high-temperature rubber composite material |
| Replacement Part Numbers |
8981581100, 8-98158110-0, 8-98158-110-0 |
Features and Advantages
• Precisely Matches OE Specifications: Designed according to the original part number 8981581100 / 8-98158110-0, its dimensions and sealing structure conform to Isuzu OE standards, requiring no modification for installation.
• High-Quality Oil-Resistant Rubber Material: Made of oil-resistant and high-temperature-resistant rubber material, it effectively resists oil corrosion and thermal cycling aging, extending its service life.
• Effectively Prevents Oil Leakage: The sealing lip design maintains a continuous fit against the crankshaft surface, effectively preventing oil leakage from the front of the crankshaft and reducing the risk of contamination of front-end accessories.
• Wide Applicability: In addition to 4JB1, this part number is also commonly used for crankshaft front oil seal requirements in some 4JJ1 engine models.





Frequently Asked Questions
Q1: What is your main products?
A1: We are specialized in the excavator engine spare parts, for example Main cylinder block, cylinder head, crankshaft, Engine assembly, piston, cylinder liner, piston ring, camshaft, connecting rod, oil pump, water pump, valve series products, movement, etc. almost all parts of the entire engine.
Q2: Do you test all products before shipping?
A2: Yes, we conduct 100% testing before shipping.
Q3: Which engine models is this Crankshaft Front Oil Seal compatible with?
A3: This product is designed for specific diesel engine models. If you can provide the engine model or original part number, we can confirm compatibility before shipping to avoid incompatibility issues.
Q4: Can you provide cross-reference information for OEM part numbers?
A4: Yes, we support original part interchange. Please provide the original part number, and we will verify the replacement part accordingly.
Q5: What should I do if there is a problem with the product?
A5: Our products undergo professional testing and are of very stable quality. If you do find any problems, please contact us. We have a professional after-sales team to help you solve the problem.
Why Choose Us?
• Over 20 years of experience specializing in construction machinery, engines, and parts – with stable experience supplying mainstream brands and models.
• Extensive experience in model matching enables us to provide customers with accurate parts selection, reducing procurement risks.
• A long-term, stable, and reliable supply system ensures reliable product sourcing and meets continuous procurement needs.
• For product information or quotations, our professional team will provide you with detailed answers immediately upon receiving your request.