Description
Ford 6.7L Powerstroke Gen 2 Fuel Filter (2017-2019) — FD-4625 Cartridge Element
The FD-4625 Fuel Filter Element is the exact-fit replacement for 2017-2019 Ford 6.7L Powerstroke Gen 2 engines. This drop-in cartridge replaces HC3Z-9N184-B and HC3Z-9N184-C with OEM-equivalent filtration performance.
2017+ Fuel System: What Changed
For the second-generation 6.7L, Ford redesigned the fuel filter housing to a cartridge-style system. Unlike the 2011-2016 spin-on filter, the 2017+ uses a drop-in element inside a permanent canister. The quick-disconnect return line fitting (HC3Z-9A564-A) is a known failure point — we stock the replacement connector separately.
Specifications
| Part Number |
FD-4625 |
| OEM Cross-Reference |
HC3Z-9N184-B, HC3Z-9N184-C, Motorcraft FD-4625 |
| Filter Type |
Cartridge (drop-in element) |
| Filtration Rating |
10 Micron |
| Fitment |
2017-2019 F-250, F-350, F-450, F-550 6.7L Powerstroke |
| Service Interval |
Every 22,500 miles (drain water separator every oil change) |
Critical: Check Your Return Line Connector
The fuel filter return line connector (HC3Z-9A564-A) on 2017+ models is a plastic quick-disconnect fitting known to crack and cause hard starting. If your truck cranks excessively before firing, replace this connector along with your filter. We stock it here.
Installation Steps
- Locate filter canister on driver-side frame rail
- Drain water using the 6mm hex drain plug
- Unscrew the canister cap (36mm socket)
- Remove old cartridge element — note orientation
- Install new FD-4625 element, replace O-ring
- Reinstall cap — torque to 25 Nm
- Cycle ignition ON (not start) 6-8 times to prime
- Start engine, check for leaks
FAQ
Q: FD-4625 vs FD-4624 — what's the difference?
A: FD-4624 was the original part number, superseded by FD-4625 with improved filtration media. FD-4625 is backward-compatible with all 2017-2019 applications.
Q: Can I use the old spin-on filter (FD-4615) in my 2017+?
A: No. The 2017+ fuel filter housing is completely different. You MUST use the FD-4625 cartridge element. Using the wrong filter type can damage the housing and cause leaks.
Q: Why is my 2017+ 6.7L hard to start after sitting?
A: The #1 cause is a cracked return line connector allowing air into the fuel system. Replace connector HC3Z-9A564-A (we stock it). Second most common cause: fuel draining back through a worn filter housing check valve.
Q: How do I prime the fuel system after a filter change?
A: Turn the key to ON (do NOT start) for 30 seconds. Turn OFF. Repeat 6-8 times. The in-tank pump will fill the filter housing and purge air. Starting without priming can cause extended cranking and possible CP4.2 damage.
