Baldwin B179 Heavy-Duty Spin-On Oil Filter | 1-16 UN

Baldwin B179 Heavy-Duty Spin-On Oil Filter — 1-16 UN

Overview

The Baldwin B179 is a heavy-duty full-flow spin-on lubricating oil filter for diesel, industrial, agricultural, and marine engine applications. Using a 1"-16 UN mounting thread, it removes abrasive contaminants from circulating engine oil while maintaining the flow required to protect bearings, journals, and other lubricated components. The B179 belongs to a widely cross-referenced filter family used across multiple diesel-engine platforms including Cummins, Detroit Diesel, International/Navistar, Case, and John Deere applications. Always confirm the existing OEM filter number and full engine application before ordering — filters with the same thread can differ in gasket diameter, bypass-valve setting, and internal media.

Compatible Applications

• Cummins diesel engines (confirm by existing filter number or engine model)
• Detroit Diesel engine applications
• International / Navistar diesel engines
• Case diesel equipment
• John Deere diesel equipment
• Marine and industrial diesel installations cross-referencing LF3349, WIX 51792, or P550425
• Confirm engine make, model, serial number, and existing OEM filter number before ordering — the 1"-16 UN thread is shared across multiple filter sizes with different dimensions and bypass specifications

Dimensions

• Thread: 1"-16 UN
• Outside diameter: approx. 3.69 in. / 93.7 mm
• Length: approx. 5.38 in. / 136.7 mm
• Gasket OD: approx. 2.81 in. / 71.4 mm
• Gasket ID: approx. 2.42 in. / 61.5 mm

Cross-Reference / Alternate Part Numbers

The following numbers are associated with the Baldwin B179 filter family:

• Baldwin: B179
• Fleetguard: LF3349
• Donaldson: P550425
• WIX: 51792
• NAPA Gold: 1792
• Luber-Finer: LFP4005

Cross-reference numbers are provided as a fitment aid only. Always confirm against the original OEM filter number and complete engine application before substituting.

Service Interval

Replace the oil filter at every engine oil change or at the interval specified by the engine manufacturer. Replace sooner if:

• Fuel, coolant, water, or debris contamination is found in the oil
• The engine has undergone internal repairs
• Oil-analysis results indicate excessive contamination or filter loading
• The filter canister is damaged, dented, or corroded
• The engine has operated under extended high-load or high-temperature conditions

Installation Notes

• Remove the old filter and confirm its gasket has not remained on the filter mounting base — a retained gasket will cause an immediate oil leak
• Clean the sealing surface on the filter base thoroughly
• Compare the new filter’s thread size, gasket diameter, and body length against the removed filter before installation
• Lightly coat the new filter’s gasket with clean engine oil
• Install by hand per Baldwin’s tightening specification — do not overtighten
• Refill the engine with the specified lubricant grade and quantity
• Start the engine and confirm normal oil pressure immediately
• Inspect the filter body and gasket for leaks during the first few minutes of operation
• Shut down, allow oil to settle, then recheck and correct the oil level

Related Products

• Baldwin Oil Filter B1400
• Baldwin Lube Spin-On Filter B7810
• Baldwin Fuel Filter Cartridge PF311
• Baldwin Fuel/Water Separator Filter BF1259
• Fleetguard Lube Filter LF3620
• AMSOIL 15W-40 Heavy-Duty Diesel & Marine Oil AME1GC — 3.78 L
• Browse All Oil Filters

Technical FAQ

How do I confirm B179 fits my engine?

The most reliable method is to locate the part number on the existing filter or in your engine’s service manual, then confirm it cross-references to Baldwin B179, Fleetguard LF3349, WIX 51792, or Donaldson P550425. Thread size alone is not sufficient — confirm the body length, gasket diameter, and bypass-valve specification match your application.

What is the bypass valve setting on the B179?

Confirm the bypass valve specification from the Baldwin catalog or your engine service documentation. Bypass settings vary across heavy-duty filter families even when thread and body dimensions appear identical, and an incorrect bypass setting can affect oil pressure management during cold starts or at high flow rates.

Can I substitute Fleetguard LF3349 or WIX 51792 for B179?

These are in the same cross-reference family, but always confirm the full dimensions, gasket specifications, and bypass setting against your original OEM filter number before substituting brands. Cross-reference lists are a starting point, not a definitive fitment guarantee.

What happens if I use a filter with the same thread but wrong dimensions?

A filter that threads on correctly but has the wrong body length, gasket diameter, or bypass setting can leak at the gasket, contact surrounding components, or fail to regulate oil pressure correctly. Always compare the new filter physically against the removed filter before installation.

Should I change the filter every oil change?

Yes — on heavy-duty diesel engines the oil filter should be replaced at every oil change. On high-hours commercial or marine applications, oil analysis can help determine whether more frequent filter changes are warranted based on contamination levels or filter loading rates.

Parts Desk Insights

Best use case: The Baldwin B179 is the right choice for customers servicing heavy-duty diesel engines on Cummins, Detroit Diesel, International/Navistar, Case, or John Deere platforms where the existing filter cross-references to LF3349, WIX 51792, or P550425. At $25.00 it is a cost-effective, high-quality option from one of the most trusted names in heavy-duty filtration. Most B179 orders come from customers doing scheduled maintenance on commercial vessels, generators, or heavy equipment with well-documented service histories — they know their filter number and just need a reliable stocking source.

Common customer questions: The most frequent issue is customers assuming thread size is sufficient to confirm fitment on a heavy-duty filter. The 1"-16 UN thread appears on several Baldwin filter families with different body lengths and gasket dimensions. Always ask for the OEM filter number or the existing filter part number before confirming the order. The second common point of confusion is substituting cross-reference numbers without checking bypass valve specifications — particularly important on Cummins and Detroit Diesel applications where oil pressure management is tightly specified.