Yoursme High Pressure Oil Pump Hoses Kit for Ford 7.3L Powerstroke (1999–2003) — HPOP & Crossover Lines with Master Service Seals

The Yoursme High Pressure Oil Pump (HPOP) Hoses, crossover lines and master service kit is a complete replacement set designed to restore sealed, high-pressure oil delivery on Ford 7.3L Powerstroke trucks from 1999–2003.

If your 7.3L Powerstroke is leaking HPOP oil, suffering from loose fittings, or you’re preparing a pump rebuild, this kit groups all the hoses, crossover line and seals needed to complete the job. Components are forged, zinc-plated steel with OEM-equivalent gaskets and rubber O-rings, rated for the temperature and pressure ranges common to diesel HPOP systems. The kit combines a dedicated HPOP hose and crossover assembly with a master service pack so technicians and DIY mechanics can replace hoses, seals and gaskets in one service session.

What parts are included and why does that matter?

The package supplies the high-pressure hose lines, crossover line and a master service collection of seals, O-rings and gaskets. Having the electrical, fluid and sealing pieces in one kit reduces repeat shop time and avoids rework caused by missing small parts.

• High-pressure hoses and crossover line built for 4800 psi working pressure.
• Master service kit with all seals and O-rings needed to reseal the HPOP.
• Forged steel fittings with clear zinc plating to resist corrosion.
• Heat-shielded hose sections rated for continuous protection up to 1100°F.

Will this kit fit my Ford 7.3L Powerstroke or Navistar engine?

Yes—the hoses and crossover assembly are matched to 1999–2003 Ford 7.3L Powerstroke F-series, E-series and Excursion models. The master service kit covers a wider range including earlier 7.3L engines and compatible Navistar DT466 and T444E applications for seal replacements during pump servicing.

• Hoses and crossover: 1999–2003 Ford 7.3L Powerstroke (F-250 through F-750, E-series, Excursion).
• Master service kit: compatible with 1994–2003 7.3L Powerstroke and Navistar 1995–2004 DT466/T444E.
• Replaces common OEM part numbers such as YC3Z-9J323-E/F and F81Z-9J323-E.

How durable and safe are the hoses under heavy use?

The hoses are engineered for high-pressure diesel oil systems with substantial burst strength and wide temperature tolerance. Materials and heat shielding are chosen to prevent degradation from heat, oil, and road exposure—minimizing the risk of premature failure in demanding conditions.

• 4800 psi working pressure and 23,200 psi minimum burst pressure ratings.
• Temperature range covering -50°F to 260+°F for ordinary operation.
• Heat shield provides 1100°F continuous and 2000°F intermittent protection.

What tools or steps are needed to install the master service parts?

The master service kit contains seals and O-rings for a full HPOP reseal; professional tools and basic mechanical skills are recommended for proper reinstallation. Following torque specs and lubrication of new O-rings will ensure a leak-free fit and extend service life.

• Seal and O-ring replacement for HPOP removal and reinstallation.
• Use of proper torque tools, thread sealant where specified, and clean surfaces for sealing.
• Recommended to inspect related hoses, fittings and the pump housing during service.

Who this is for: This kit is aimed at technicians, fleet maintenance managers and experienced DIY mechanics who service Ford 7.3L Powerstroke trucks and need a complete hose and service-seal solution. It’s especially useful when addressing HPOP leaks, during pump replacement, or when performing preventative maintenance to avoid downtime on F-series, E-series and Excursion diesel vehicles.