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{"title":"ISUZU NPR 4HG1 TURBO CHARGER ASM 8973267520 704136-0003 8972083520","imgUrl":"https:\/\/img.chinax.com\/nimg\/49\/ea\/f9c869f0e686c77a889c17a84b86-200x200-1\/isuzu_npr_4hg1_turbo_charger_asm_8973267520_704136_0003_8972083520.jpg","attrs":{"Model Number":"NPR 4HG1","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"Durable Isuzu Cars Parts FVR32 6HE1 Gasket Cylinder Head 8943963341","imgUrl":"https:\/\/img.chinax.com\/nimg\/52\/e1\/d6ef2b7634d5d277fb6272e10b8b-200x200-1\/durable_isuzu_cars_parts_fvr32_6he1_gasket_cylinder_head_8943963341.jpg","attrs":{"Brand Name":"YIMI","Model Number":"FVR32 6HE1","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS"}}
{"title":"BL0CK ASM CYL NPR 4HG1 4HG1-T 4HF1 8982045330","imgUrl":"https:\/\/img.chinax.com\/nimg\/b5\/65\/486b19b43672c3be4efdee332582-200x200-1\/bl0ck_asm_cyl_npr_4hg1_4hg1_t_4hf1_8982045330.jpg","attrs":{"Model Number":"NPR 4HG1 4HG1T 4HF1","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"NPR 700P 4HK1 TURBO CHARGE 8980000311 8970786400","imgUrl":"https:\/\/img.chinax.com\/nimg\/bf\/e4\/ab2ffd604bc21336062bab1561b6-200x200-1\/npr_700p_4hk1_turbo_charge_8980000311_8970786400.jpg","attrs":{"Model Number":"NPR 700P 4HK1","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"NPR 4BD2 3.9L CYLINDER HEAD 8971030270","imgUrl":"https:\/\/img.chinax.com\/nimg\/c0\/a8\/bc770a27bfb7fb839df3007b51a1-200x200-1\/npr_4bd2_3_9l_cylinder_head_8971030270.jpg","attrs":{"Model Number":"NPR 4BD2","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
The Piston Oil Jet (OEM Numbers: 8-94370579-1 / 8943705791) is a premium-quality, direct replacement engine component designed specifically for ISUZU NPR66 series medium-duty trucks equipped with 4HF1 diesel engines. This precision-engineered oil jet directs a stream of pressurized oil onto the underside of the piston crown for essential cooling and lubrication.
OE Quality: Manufactured to strict ISUZU dimensional and material specifications for perfect fit and function
Precision Orifice: Delivers correct oil flow rate and spray pattern for optimal piston cooling
Durable Steel Construction: Withstands high oil pressure, temperature, and vibration
Restores Piston Cooling: Eliminates overheating, scuffing, and seizure caused by clogged or damaged jets
Direct Replacement: Matches OE jet dimensions and mounting configuration
Long Service Life: Engineered for heavy-duty diesel engine applications
Essential for Engine Overhaul: Critical component to replace during piston or block service
Reliable Performance: Ensures proper lubrication and cooling for extended engine life
Vehicle & Engine Compatibility
This piston oil jet is specifically designed for ISUZU medium-duty trucks and commercial vehicles:
ISUZU NPR66 (Medium-Duty Trucks)
ISUZU N Series (NK, NP - as applicable)
ISUZU 4HF1 Engine Specifications:
4-Cylinder, Inline Diesel
Displacement: 4.3L
Valvetrain: OHV
Application: Medium-duty trucks and commercial vehicles
Also compatible with various ISUZU models using the 4HF1 engine with the same piston cooling jet configuration.
Installation Notes
Professional engine builder installation recommended:
Drain engine oil - Drain oil to prevent spills during component removal
Remove the oil pan - Remove the oil pan to access the piston oil jets
Locate the oil jets - Identify the piston cooling jets and note their orientation
Remove the old oil jet - Carefully remove the old jet from the engine block
Clean the mounting area - Remove dirt, debris, and old sealant from the jet bore
Inspect oil galleries - Ensure all oil passages are clear and free from sludge
Install the new oil jet - Press or thread the new jet into position with correct orientation
Torque if applicable - Tighten to manufacturer torque specifications if threaded
Check clearance - Ensure the jet does not contact moving parts
Reinstall oil pan - Install new oil pan gasket and reinstall pan with proper torque
Refill with engine oil - Fill with correct grade and quantity of engine oil
Start and check - Start engine; check oil pressure warning light and inspect for leaks
Quality Control
Material Verification: Confirms steel composition meets ISUZU strength specifications
Dimensional Inspection: Jet dimensions and mounting points verified within OEM tolerances
Flow Testing: Sample tested to ensure correct oil flow rate and spray pattern
Pressure Testing: Sample tested for integrity under operating oil pressure
Visual Inspection: 100% checked for cracks, burrs, or manufacturing defects
Packaged Safely: Protected and packaged 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
For pricing, availability, or bulk purchase of the Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine, 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 ...