Cummins Crankshaft Rear Oil Seal 3693669| For ISG & QSG Engines
Ensure a leak-free seal and reliable engine performance for your Cummins diesel engine with the premium Crankshaft Rear Oil Seal 3693669 / 3693669F. This precision-engineered sealing component is specifically designed to prevent oil leakage from the cylinder block at the rear of the crankshaft, maintaining proper lubrication pressure and engine cleanliness for demanding heavy-duty applications .
3693669
Cummins engine parts Crankshaft Rear Oil Seal
The 3693669 is a high-quality crankshaft rear main seal manufactured to meet or exceed original equipment specifications. According to official Cummins parts data, this oil seal is primarily used on ISG and QSG engine families .
| Specification | Detail |
|---|---|
| Part Number | 3693669 / 5265267 |
| Description | Crankshaft Rear Oil Seal / Rear Main Seal |
| Engine Applications | ISG, QSG Series |
| Material | Rubber ring with plastic cover component |
| Function | Seals crankshaft rear end to prevent oil leakage from cylinder block |
| Shipment Weight | 0.15 lbs (approx.) |
| Quality | OEM-grade, 100% tested |
Compatible Engine Platforms
The crankshaft rear oil seal 3693669 / 5265267 is compatible with the following Cummins engine families :
| Engine Series | Specific Models | Applications |
|---|---|---|
| ISG Series | ISG11, ISG12 | Heavy-duty trucks, commercial vehicles |
| QSG Series | QSG12 | Generator sets, industrial power |
These engine platforms are widely used in:
- Heavy-Duty Trucks: Long-haul and vocational applications
- Construction Equipment: Excavators, loaders
- Power Generation: Standby and prime power generators
- Industrial: Compressors, pumps
Technical Features & Benefits
The Cummins 3693669 crankshaft seal is engineered with advanced features for reliable sealing performance :
✅ Precision Fitment: Manufactured to exact OEM specifications for a perfect seal every time
✅ Dual-Component Design: Consists of rubber sealing ring and plastic cover component for enhanced sealing integrity
✅ Leak Prevention: Designed to withstand engine operating pressures and temperatures, preventing oil seepage from the cylinder block
✅ High Temperature Resistance: Engineered for reliable operation in harsh engine environments
✅ Direct Replacement: OE-spec component for seamless installation
Why Choose Premium Crankshaft Seals?
The crankshaft rear oil seal is a critical component for engine health. A quality seal like the 3693669 / 3693669F ensures:
- Oil Containment: Prevents engine oil from leaking at the rear of the crankshaft
- Engine Cleanliness: Stops oil contamination of clutch, flywheel, and surrounding components
- System Integrity: Maintains proper oil pressure for optimal engine lubrication
- Extended Service Life: Quality materials resist hardening and cracking over time
- Cost Savings: Prevents costly repairs from oil loss and potential engine damage
Cross Reference & Interchange Information
The Cummins 3693669 crankshaft seal may be referenced as: 5265267
Complete Range of Cummins Sealing Solutions
At Multistar Parts Co., Ltd., we supply a comprehensive selection of Cummins engine seals and gaskets :
Crankshaft Seals:
- 3693669 – Rear crankshaft oil seal for ISG/QSG engines
- Front crankshaft oil seals for various Cummins models
Additional Sealing Components:
- Cylinder head gaskets
- Valve cover gaskets
- Oil pan gaskets
- Rocker lever housing gaskets
- Timing cover gaskets
- O-rings and valve stem seals
Compatible Engine Series:
- 4BT3.9, 6BT5.9, 6CT8.3
- M11, L10, NT855, N14
- K19, K38, K50
- ISB, ISC, ISD, ISL, ISM, ISX
- QSB, QSC, QSL, QSM, QSX
Why Choose Multistar Parts Co., Ltd.?
As a specialized supplier of Cummins engine parts from China, we offer:
- ✅ Premium Quality: Genuine-grade components meeting OEM specifications
- ✅ 100% Testing: Rigorous quality control before shipment
- ✅ Extensive Inventory: Comprehensive stock of ISG, QSG, and other Cummins engine parts
- ✅ Global Logistics: Worldwide shipping to minimize downtime
- ✅ Competitive Pricing: Wholesale rates for fleets, workshops, and distributors
- ✅ Technical Support: Expert assistance for parts identification
- ✅ Flexible MOQ: Single piece orders accepted
Installation Tips for Crankshaft Rear Oil Seals – Cummins engine parts
When replacing the crankshaft rear oil seal 3693669 on your Cummins engine :
- Clean Surfaces Thoroughly: Remove debris and old seal residue from the housing
- Use Installation Tool: Use a proper seal installation tool to ensure concentricity (≤0.1mm)
- Lubricate Seal Lip: Apply clean engine oil to the sealing lip before installation
- Check Surface Finish: Ensure the shaft surface is smooth (Ra ≤0.8μm) to prevent premature wear
- Follow Torque Specs: Tighten retaining bolts to manufacturer specifications (typically 15-20 N·m)
- Test After Installation: Run engine and inspect for any signs of oil leakage
Keep Your Cummins Engine Leak-Free
Prevent costly oil leaks and ensure reliable engine operation for your ISG or QSG engine with the Cummins Crankshaft Rear Oil Seal 3693669 from Multistar Parts Co., Ltd. Whether you need a single seal for a repair or wholesale quantities for fleet maintenance, we deliver the quality, reliability, and support your operations demand.
Contact Multistar Parts Co., Ltd. today to order the Cummins 3693669 Crankshaft Rear Oil Seal or inquire about our full range of Cummins engine seals and gasket kits.
Trust Multistar Parts Co., Ltd. as your dedicated partner for genuine-quality Cummins engine components.
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