The factory high-pressure oil lines on the 7.3-liter Power Stroke are a weak point, known for leaking and being a nightmare to work on. Thoroughbred Diesel recently tackled this common problem, providing a detailed oil pump lines installation guide.

The Most Important Warning

Before a single wrench was turned, Wade from Thoroughbred Diesel focused on the single most critical step of the entire job: electrical safety. “One thing that is in this set of instructions that is a major installation point on this kit, is to make sure that you disconnect the positive cables of the batteries,” he stressed.

He explained that this is the most common and costly mistake people make. The new, metal-encased lines will instantly arc and burn a hole if they touch a live power source, like the alternator lug, creating a massive oil leak that is not covered under warranty.

Step-by-Step High-Pressure Oil Pump Lines Installation

With the batteries disconnected, the mechanical work began with removing the fuel bowl to gain access to the High-Pressure Oil Pump (HPOP) underneath. Wade shared his personal frustration with the factory quick-connect fittings, calling them the “bane of my existence” as he removed the old lines and fittings together.

The process also involved a key performance upgrade: removing the factory check valves from inside the HPOP before installing the new, higher-flow CNC fittings. The new kit also included a third “crossover” line, which connects the two cylinder heads to help balance oil pressure.

The CNC Fabrication Diesel Performance Difference

Throughout the installation, Wade highlighted the thoughtful details of the CNC Fabrication Diesel Performance kit. He pointed out that CNC numbers every fitting and provides a clear map, which takes the guesswork out of the installation. The biggest difference, however, was in the final appearance. Wade praised the clean, professional look of the finished job. “You see a lot of these aftermarket lines that come up. They’re longer and they loop around. It clutters up the engine bay more,” he said.

More Than Just a Leak Fix

Thoroughbred Diesel’s guide to the high-pressure oil pump lines installation is a perfect masterclass for any 7.3-liter owner. It proves that with the right parts and the right guidance, you can permanently fix a notorious problem and add a clean, high-performance touch to your engine bay.