Nissan HR15 engine oil pump gear

Nissan HR15 engine oil pump gear - Precision drive component for stable lubrication pressure

Product Features

• Engine-matched geometry: Gear profile and pitch designed for the HR15/HR15DE oil pump to maintain target flow and pressure under typical driving loads.
• Wear-resistant surface: Case-hardened tooth flanks (typical 58–62 HRC) to reduce scuffing and pitting during high-cycle operation and cold-start boundary lubrication.
• Dimensional control: Tight runout and concentricity tolerances to minimize pump noise, cavitation risk, and pressure pulsation in the engine lubrication system.

Product Description

This gear drives the oil pump in Nissan HR-series 1.5L gasoline engines (HR15/HR15DE). Its function is to transmit torque from the crankshaft-driven stage to the pump rotor, ensuring continuous oil delivery to bearings, camshaft journals, timing components, and hydraulic lash adjusters. The gear’s involute profile, tooth contact ratio, and surface finish are selected to sustain hydrodynamic film formation, reduce micro-slip, and maintain stable oil pressure across a wide RPM range. Typical use cases include HR15 oil pump gear replacement, scheduled engine overhauls, and preventive maintenance for fleets.

Manufacturing follows controlled heat treatment and process capability aligned with automotive quality systems (e.g., ISO 9001, IATF 16949). Materials and hardness depth are specified to resist tooth root fatigue and abrasive wear from contaminated oil. The component is available for OEM-spec supply or aftermarket HR15 oil pump gear programs, with PPAP/IMDS and traceability upon request. Commercial options include batch production for distributors, bulk order pricing, and private-label packaging.

Technical Specifications

Applications

This product is applicable to the following industrial scenarios:

• Nissan HR15 oil pump gear replacement during engine rebuild or corrective maintenance.
• Preventive maintenance for ride-hailing, delivery, and fleet vehicles using HR15-based powertrains.
• Aftermarket parts programs requiring stable supply for HR15DE lubrication system components.
• Technical investigations of low oil pressure, pump noise, or gear wear in HR-series engines.

FAQ

1) How do I verify compatibility with my Nissan HR15 engine?

Match the oil pump gear to the engine code (HR15/HR15DE) and the pump assembly part number on the vehicle or service manual. If an OEM drawing or sample is available, confirm teeth count, module, width, and hub features. When in doubt, provide VIN and pump P/N for cross-check.

2) What are common symptoms of a worn or damaged HR15 oil pump gear?

Typical indicators include delayed oil pressure after cold start, intermittent low-pressure warnings at idle, abnormal pump noise, and metallic debris in the oil filter. If these occur, inspect tooth flanks for pitting, scuffing, or abnormal wear and verify pump clearances.

3) Do I need to prime the oil pump after replacing the gear?

Yes. Pre-lube the pump with clean engine oil and follow service manual procedures to prevent dry running. After assembly, crank the engine without ignition (if possible) to build oil pressure, then verify pressure at idle and under light load. Replace the oil filter and use oil grade specified for the HR15DE.