ISUZU 4JG1 4JG2 Front Crank Oil Seal Dual-Lip TB Type NBR/FPM Material 50×68×9 mm OEM Fit 8-97049145-0
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
4JG1 4JG2
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Inner Diameter: | 50 Mm | Outer Diameter: | 68 Mm |
| Thickness: | 9 Mm | Material: | NBR (Nitrile Butadiene Rubber) / FPM (Fluoroelastomer) |
| Temperature Range: | −40°C To +204°C | Shaft Diameter: | 50 Mm |
| Housing Bore: | 68 Mm | Net Weight: | 0.02 Kg |
| High Light: | Dual-Lip TB Type Front Crank Oil Seal,NBR/FPM Material Crankshaft Oil Seal,50×68×9 mm Timing Side Oil Seal |
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Product Description
ISUZU 4JG1 4JG2 Front Crank Oil Seal 8-97049145-0 8970491450 OEM Fit
Front Crank Oil Seal 8-97049145-0 8970491450 for ISUZU 4JG1 4JG2 4JB1 NHR NKR NPR NQR TBR TFR TFS — Verified OEM Fit 50×68×9 mm NBR Crankshaft Seal
Product Overview
The Front Crank Oil Seal with OEM numbers 8-97049145-0 and 8970491450 is a verified direct-fit replacement for ISUZU NHR/NKR/NPR/NQR/TBR/TFR/TFS light trucks and pickups, as well as Holden Rodeo/Colorado, Opel Campo, and Vauxhall Brava models equipped with 4JG1/4JG2/4JB1/4JA1/4JJ1/4LE1/4LE2 diesel engines. This critical engine sealing component is installed at the front crankshaft (timing side) to retain engine oil within the crankcase and prevent leakage while blocking dust, water, and debris from entering the timing cover.
Working Principle
The front crank oil seal creates a dynamic seal between the rotating crankshaft and stationary timing cover. The dual-lip TB-type design features a primary sealing lip that maintains contact with the crankshaft surface under spring tension, and a secondary dust lip that blocks contaminants. The NBR (Nitrile Butadiene Rubber) construction provides excellent resistance to engine oil, high temperatures, and compression set.
Failure Symptoms
- Engine oil leakage at the front of the engine — visible oil traces on timing cover, crankshaft pulley, or under vehicle
- Oil accumulation on crankshaft pulley indicating seal lip failure
- Oil contamination on timing belt or timing chain causing premature wear
- Low engine oil level without visible external leaks elsewhere
- Visible cracks, swelling, or hardening of the rubber indicating aging
Critical Inspection Note: ISUZU service manuals require that the front crank oil seal be replaced, never reused whenever the crankshaft pulley or timing cover is removed. The seal must be installed using a specialized installer tool and coated with clean engine oil before installation.
Technical Specifications
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 8-97049145-0 | ISUZU OEM Parts Database |
| Part Number (Long) | 8970491450 | ISUZU OEM Parts Database |
| Part Name | SEAL; OIL, CR/SHF, FRT | ISUZU EPC |
| Inner Diameter | 50 mm | ELRING 848.410 specification |
| Outer Diameter | 68 mm | ELRING 848.410 specification |
| Thickness | 9 mm | National 225020 specification |
| Seal Type | TB Type, Dual-Lip | Product specification |
| Material | NBR (Nitrile Butadiene Rubber) | PAYEN NK251 specification |
| Temperature Range | −40°C to +204°C | National 225020 specification |
| Net Weight | 0.02 kg | Product specification |
| Certification | ISO/TS 16949 | Third-party system audit |
OEM Cross-Reference
| Type | Number |
|---|---|
| Primary OEM — Short | 8-97049145-0 |
| Primary OEM — Long | 8970491450 |
| Related OEM (KIA) | 0K551-10602 / 0K55110602 |
| Related OEM (Toyota) | 90311-50017 / 90311-50051 / 90311-T0054 |
| Related OEM (GM) | 9-09924-296-0 / 90924296 / 5-09625-079-0 / 5096250790 |
| Competitive Cross-Reference | ELRING 848.410, PAYEN NK251, National 225020, BGA OS9374, FAI OS2174 |
Product Details
| Part Number: | 8-97049145-0 8970491450 | Product Name: | Front Crank Oil Seal |
| Car Model: | 4JG1 4JG2 | Engine Model: | 4JG1 4JG2 |
| Condition: | 100% Brand New | Size: | Standard |
| Origin: | China Mainland | Main Market: | Middle East, Asia, Africa, South America, North America & Europe |
Vehicle & Engine Compatibility
Primary Applications: ISUZU ELF NHR/NKR/NPR, ISUZU NQR, ISUZU TBR/TFR/TFS, ISUZU Pickup TF/TFR/TFS, ISUZU D-MAX, ISUZU MU-X/Wizard, ISUZU Trooper/Bighorn
Non-ISUZU Applications: Holden Rodeo/Colorado, Opel Campo/Frontera, Vauxhall Brava/Frontera, JMC 1030/1040/Kaiyun, JAC 4DA1, Foton 493, KIA engine applications
Important Fitment Notes: This oil seal is designed for the 50×68×9 mm application. Confirm dimensions before ordering. This is the front crankshaft oil seal (timing side) — NOT the rear main seal. Oil seals should be replaced whenever the crankshaft pulley or timing cover is removed.
Fitment Verification: To ensure 100% accurate matching, please provide the VIN or chassis number before ordering. We will verify it through the ISUZU global EPC system.
Features & Benefits
Dual-Lip TB Type Design
Primary sealing lip retains engine oil while secondary dust lip blocks water and debris
Primary sealing lip retains engine oil while secondary dust lip blocks water and debris
NBR/FKM Rubber Compound
Excellent resistance to engine oil, high temperatures, and compression set
Excellent resistance to engine oil, high temperatures, and compression set
OEM-Exact 50×68×9 mm Dimensions
Precision-matched for direct press-fit installation without modification
Precision-matched for direct press-fit installation without modification
Spring-Loaded Lip
Maintains consistent contact pressure for reliable sealing at all operating speeds
Maintains consistent contact pressure for reliable sealing at all operating speeds
Temperature Range −40°C to +204°C
Withstands extreme engine temperatures for long service life
Withstands extreme engine temperatures for long service life
ISO/TS 16949 Quality System
Full traceability with material certificates and batch inspection reports
Full traceability with material certificates and batch inspection reports
Quality Control
| QC Item | Verification Method / Standard |
|---|---|
| Inner Diameter (50 mm) | CMM, 100% inspection |
| Outer Diameter (68 mm) | CMM, 100% inspection |
| Thickness (9 mm) | CMM, 100% inspection |
| Lip Geometry Angle | Optical comparator, 100% inspection |
| Material Hardness | Durometer, batch sampling |
| Fluid Immersion Resistance | ASTM D471 — 70h @ 100°C in engine oil |
| Compression Set | ASTM D395 — 70h @ 100°C |
Installation Guidelines
IMPORTANT: Engine front seal service must be performed by a qualified technician. Always support the vehicle on a hoist and relieve belt tension before removing the crankshaft pulley. Never reuse old oil seals.
- Preparation: Raise vehicle on hoist. Remove drive belt(s), cooling fan assembly, and crankshaft damper pulley
- Removal: Remove old front oil seal using seal puller or ISUZU special tool
- Inspection: Inspect crankshaft sealing surface and timing cover bore for damage
- Cleaning: Clean crankshaft surface and timing cover bore thoroughly
- Installation: Coat new oil seal lip with clean engine oil. Press seal into timing cover until fully seated
- Pulley Installation: Reinstall crankshaft damper pulley and tighten to specification
- Final Check: Check engine oil level and run engine to verify no leakage
- Road Test: Perform road test to confirm no oil leakage
Maintenance Schedule
- Every 10,000 km: Inspect front crank seal area for oil leakage. Check engine oil level
- Every 40,000-50,000 km: Inspect front crank seal and timing cover for oil residue
- Whenever crankshaft pulley is removed: Always replace front crank oil seal with new unit
- When oil contamination detected: Inspect front crank seal immediately and replace if leaking
Packaging & Supply
Standard Packaging: Sealed bag + moisture barrier + neutral carton
Custom Packaging: Neutral box, color box, or customer-branded packaging
Suitable For: Engine repair shops, ISUZU parts distributors, fleet maintenance centers
Minimum Order Quantity: 10 PCS
Custom Packaging: Neutral box, color box, or customer-branded packaging
Suitable For: Engine repair shops, ISUZU parts distributors, fleet maintenance centers
Minimum Order Quantity: 10 PCS
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