These oil jet check valves are essential components designed to regulate cooling oil flow to pistons in Isuzu commercial trucks. This set of 4 precision-engineered valves ensures proper lubrication and temperature control for your engine's pistons, helping to prevent overheating and premature wear. Manufactured from high-speed steel with a machined black finish, these valves are built to meet OEM specifications for reliable performance. Compatible with Isuzu NRR, NQR, and NPR-HD models equipped with 4HK1 5.2L and 4HE1 4.8L engines from 1995 to 2024, they provide a direct replacement solution for maintaining optimal engine function. Each valve features a hexagonal head design with threaded shaft and center bore for precise oil delivery. The robust construction ensures durability under high-pressure conditions, while the check valve mechanism prevents backflow to maintain consistent oil pressure. Ideal for fleet maintenance, repair shops, or DIY mechanics looking to restore proper piston cooling function in their Isuzu trucks.

COMPATIBLE APPLICATION: Set of 4 oil jet check valves designed specifically for Isuzu NRR, NQR, and NPR-HD trucks with 4HK1 5.2L and 4HE1 4.8L engines from 1995-2024

PISTON COOLING FUNCTION: These check valves control oil flow to cool pistons, preventing overheating and ensuring optimal engine performance and longevity

DURABLE CONSTRUCTION: Manufactured from high speed steel with machined exterior finish for superior strength, precision fit, and long-lasting reliability

OEM SPECIFICATIONS: Meets original equipment manufacturer specifications to ensure proper fit and function as a direct replacement part

OEM

8973296180 / 1131610120 / 1131610100

1131610090 / 1131610080 / 8943240490