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ISUZU NKR Rear Crankshaft Oil Seal 8-97049146-0 8970491460 OEM Fit
Product Overview
Rear Crankshaft Oil Seal 8-97049146-0 8970491460 for ISUZU NKR NPR TFR TFS 4JB1 4JG2 4JA1 — Verified OEM Fit 95×118×10 mm NBR/FKM Rear Main Seal
This rear crankshaft oil seal with OEM numbers 8-97049146-0 and 8970491460 is a verified direct-fit replacement for ISUZU NKR/NPR/TFR/TFS/ELF light trucks and pickups, as well as Holden Rodeo/Colorado, Opel Campo/Monterey, and Vauxhall Brava/Monterey models equipped with 4JB1/4JG2/4JA1/4JX1/4ZA1/4FC1/4FG1 diesel engines.
Working Principle
The rear crankshaft oil seal creates a dynamic seal between the rotating crankshaft and stationary engine block/flywheel housing. It retains engine oil within the crankcase while preventing external contaminants from entering the clutch or flywheel area.
The dual-lip design features a primary sealing lip that maintains contact with the crankshaft surface under spring tension, and a secondary dust lip that blocks water, mud, and debris. The NBR (Nitrile Butadiene Rubber) or FKM (Fluoroelastomer) construction provides excellent resistance to engine oil, high temperatures, and compression set.
Failure Symptoms
Replace the rear crankshaft oil seal when any of these symptoms appear:
Engine oil leakage between engine and transmission — visible oil traces at bell housing or dripping from transmission area
Oil contamination on clutch disc or flywheel — causing slipping or chatter
Oil accumulation at bottom of bell housing — indicates seal lip failure
Low engine oil level without visible external leaks elsewhere — gradual oil loss
Visible cracks, swelling, or hardening of rubber — indicates aging and loss of elastic properties
Critical Inspection Note: ISUZU service manuals require that the rear crankshaft oil seal be replaced, never reused, whenever the transmission or flywheel is removed. The seal must be installed using a specialized installer tool and coated with clean engine oil before installation.
Middle East, Asia, Africa, South America, North America & Europe
Vehicle & Engine Compatibility
Primary Applications
Brand
Model
Chassis
Engine
Years
ISUZU
ELF
NHR54 / NHR55
4JA1 / 4JG2
1986-1995
ISUZU
ELF
NKR55 / NKR66
4JB1 / 4JG2
1986-2007
ISUZU
NPR
NPR66 / NPR69 / NPR71
4JG2 / 4JB1 / 4HF1
1990s-2000s
ISUZU
NQR
NQR70 / NQR71 / NQR75
4JB1 / 4JG2
1996-2007
Non-ISUZU Applications (Same Engine Platform)
Brand
Model
Application
Holden
Rodeo RA / RC
Pickup / SUV
Holden
Colorado RC
Pickup
Opel
Campo (TF0, TF1)
Pickup
Opel
Monterey UBS25 / UBS26
SUV
Important Fitment Notes:
This oil seal is designed for the 95×118×10 mm application
The 8-97049146-0 is the rear crankshaft oil seal (transmission side) — NOT the front crankshaft seal
Oil seals should be replaced whenever the transmission or flywheel is removed
For right-hand drive (RHD) vehicles, verify clearance and orientation
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 Design with Dust Lip
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
OEM-Exact 95×118×10 mm Dimensions
Precision-matched to ISUZU 4JB1/4JG2/4JA1 crankshaft and flywheel housing
Spring-Loaded Lip
Maintains consistent contact pressure on crankshaft surface for reliable sealing
Temperature Range −40°C to +200°C
Withstands extreme engine temperatures for long service life
ISO/TS 16949 Quality System
Full traceability with material certificates and batch inspection reports
Quality Control & Verification
QC Item
Verification Method / Standard
Inner Diameter (95 mm)
CMM, 100% inspection
Outer Diameter (118 mm)
CMM, 100% inspection
Thickness (10 mm)
CMM, 100% inspection
Lip Geometry Angle
Optical comparator, 100% inspection
Material Hardness (Shore A)
Durometer, batch sampling
Fluid Immersion Resistance
ASTM D471 — 70h @ 100°C in engine oil
Installation & Maintenance
IMPORTANT: Engine rear seal service must be performed by a qualified technician. Always support the vehicle on a hoist and support the engine/transmission before removing the transmission. Never reuse old oil seals.
Installation Guidelines
Preparation: Raise vehicle on hoist. Support engine with lifting device. Remove transmission from engine.
Removal: Remove flywheel or flex plate. Remove old oil seal using seal puller or pry bar.
Inspection: Inspect crankshaft sealing surface for wear, scoring, or pitting.
Cleaning: Clean crankshaft surface and flywheel housing bore thoroughly.
Installation: Coat new oil seal lip with clean engine oil. Use seal driver to press seal into flywheel housing until fully seated.
Flywheel Installation: Reinstall flywheel or flex plate. Tighten bolts to specification.
Final Check: Check engine oil level. Run engine and check for oil leakage.
Road Test: Lower vehicle and perform road test to verify no oil leakage.
Maintenance Schedule
Every 10,000 km: Inspect rear main seal area for oil leakage. Check engine oil level.
Every 40,000-50,000 km: Inspect rear main seal and flywheel housing for oil residue.
Whenever transmission is removed: Always replace rear crankshaft oil seal with new unit.
When clutch slippage is detected: Inspect rear main seal immediately.
Packaging & Supply
Standard Packaging: Sealed bag + moisture barrier + neutral carton
Custom Packaging: Neutral box, color box, or customer-branded packaging
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...