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Bypass Valve Assembly 8970757540 For ISUZU NKR77 4JH1 Engine 8-97075754-0
Product Overview
Precision-engineered bypass valve assembly regulates coolant or oil flow in ISUZU 4JH1 engines, maintaining optimal operating temperature and pressure for reliable engine performance.
Part Number
8970757540, 8-97075754-0
Product Name
Bypass Valve Assembly / Thermostat Bypass Valve
Car Model
ISUZU NKR77, ISUZU NPR
Engine Model
ISUZU 4JH1 Diesel Engine (3.0L)
Condition
100% Brand New
Origin
China Mainland
Main Market
Middle East, Asia, Africa, South America, North America & Europe
Warranty
6 Months
Features & Advantages
OE Quality: Manufactured to strict ISUZU dimensional and material specifiions for perfect fit and function
Precision Engineering: Calibrated valve mechanism ensures accurate fluid flow regulation
Durable Construction: High-grade cast housing withstands extreme temperatures and pressures
Reliable Spring Mechanism: Consistent valve operation throughout the service life
Corrosion-Resistant: Treated surfaces resist rust and degradation from coolant or oil exposure
Restores Temperature Control: Eliminates overheating or underheating caused by faulty bypass valves
Maintains Fluid Pressure: Ensures proper system pressure for optimal engine protection
Direct Replacement: Simple installation with no modifiions required
Long Service Life: Engineered to withstand the rigors of heavy-duty commercial operation
Prevents Engine Damage: Protects against overheating-related failures and costly repairs
Vehicle & Engine Compatibility
This bypass valve assembly is specifically designed for ISUZU light to medium-duty trucks:
ISUZU NKR77 - Light to Medium-Duty Trucks
ISUZU NPR - Medium-Duty Trucks
ISUZU ELF (select models with 4JH1 engine)
ISUZU NKR (various models with 4JH1 engine)
ISUZU 4JH1 Engine Specifiions
4-Cylinder, Inline Diesel
Displacement: 3.0L (2999cc)
Turbocharged, Intercooled
Valvetrain: DOHC
Widely used in NKR77 and various medium-duty trucks
Installation Notes
Professional installation recommended for proper system integrity:
Relieve system pressure - Drain coolant (or relieve oil pressure) as applicable for your system
Loe the bypass valve housing - Identify the valve assembly on the engine block or housing
Clean the surrounding area - Remove dirt and debris to prevent contamination
Remove the old valve assembly - Unbolt and carefully remove the old valve assembly
Clean mounting surfaces - Remove old gasket material and clean the sealing surfaces thoroughly
Inspect the housing bore - Check for scoring, corrosion, or damage to the valve bore
Prepare the new assembly - Install new O-rings or gaskets supplied with the valve (if applicable)
Apply sealant if required - Use approved sealant on threads or gasket surfaces per manufacturer spec
Install the new bypass valve - Position the new assembly and torque mounting bolts to specifiion
Reconnect hoses/lines - Reattach any coolant or oil lines to the valve housing
Refill coolant/check oil - Refill cooling system or check oil level per manufacturer requirements
Bleed air from system - Bleed air from the cooling system if applicable
Check for leaks - Start the engine and inspect for any fluid leakage around the valve
Verify operation - Allow engine to reach operating temperature and confirm proper valve function
Quality Control
Material Verifiion: Confirms housing and internal component materials meet OE specifiions
Dimensional Inspection: Housing and valve dimensions verified against OEM tolerances
Spring Tension Testing: Valve spring force measured to ensure correct opening and closing characteristics
Calibration Verifiion: Valve operation verified at specified temperature or pressure thresholds
Seal Integrity Check: Sealing surfaces and gaskets inspected for leak-proof performance
Surface Finish Inspection: Machined surfaces checked to ensure proper sealing and operation
Visual Inspection: 100% checked for casting defects, machining flaws, or damage
Packaged Safely: Protected and securely boxed to prevent damage during transit
Packaging and Delivery
Neutral export packing or customized packaging available
Carton or wooden case for safe transportation
Fast delivery for stock items
Shipping by Express Air or Sea
Inquiry
For pricing, availability, or bulk purchase of the Bypass Valve Assembly 8970757540 For ISUZU NKR77 4JH1 Engine 8-97075754-0, please contact our sales team for a competitive quote and expert technical support.
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 ...
