Description
Wix 51734 is a spin-on full-flow lube oil filter for Ford 7.3L Powerstroke and 7.3L IDI/IDIT diesels, replacing Motorcraft FL1995 and Ford F4TZ-6731-A with the factory 1-1/2 in -16 thread, 8.09 in length, and 4.28 in OD. Built on Wix enhanced cellulose media (~21 micron, 28–30 GPM rated flow, 385 psi burst), it is sized for the high oil flow the 7.3L’s HEUI hydraulic injection system demands.
Signs You Need a New Oil Filter
- Service interval reached (5,000 mi typical, every oil change on the 7.3L)
- Low oil pressure at idle, especially when hot
- Long crank from cold start (HEUI system depends on oil supply)
- Dirty or contaminated oil on the dipstick
- Engine running hotter than normal under load
Specifications
| Manufacturer | Wix Filters |
|---|---|
| Part Number | 51734 |
| Part Type | Spin-On Full-Flow Lube Oil Filter |
| Media | Enhanced Cellulose |
| Overall Height | 8.09 in (205.5 mm) |
| Outer Diameter (Top) | 4.28 in |
| Thread Size | 1-1/2 in -16 |
| Burst Pressure | 385 psi |
| Max Flow Rate | 28–30 GPM |
| Nominal Micron Rating | 21 µm |
| Engine Compatibility | Ford 7.3L Powerstroke; 7.3L IDI / IDIT; 6.0L Powerstroke (secondary) |
Cross References
This filter replaces or is equivalent to the following part numbers:
- Motorcraft: FL1995
- Ford: F4TZ-6731-A, F4TZ-6731-AB
- Fleetguard: LF3630
- Baldwin: B7039
- Napa Gold: 1734
- Fram: PH3614
- Hastings: LF400
- Luber-Finer: LFP3614
- GM / Mercruiser: 25177933, 862889
Applications
This oil filter fits the following engines:
- Ford 7.3L Powerstroke (1994.5–2003)
- Ford / International 7.3L IDI & IDIT (1988–1994)
- Ford 6.0L Powerstroke — secondary application (2003–2007)
Representative vehicles using these engines:
- Ford F-250 / F-350 Super Duty 7.3L (1994.5–2003)
- Ford F-250 / F-350 7.3L IDI / IDIT (1988–1994)
- Ford F-450 / F-550 Super Duty 7.3L (1999–2003)
- Ford E-350 / E-450 Econoline diesel vans (1995–2003)
- Ford Excursion 7.3L Powerstroke (2000–2003)
Verify your engine and configuration before ordering — the 51734 is the OE-sized filter; if the previous owner installed an extended-length adapter, a longer filter (Wix 51792 / Motorcraft FL2016) may be required.
