Baldwin BW5178 Cooling System Filter
OE Quality 60-Day Returns
Baldwin

Baldwin BW5178 Cooling System Filter

Brand Baldwin BW5178
Contains 10 units bte
Fits "mack engines, trucks"
Height 5 3/8
Height (mm) 136.5
Integral Gasket {g381-a}
Outside Diameter 1 3 11/16
Outside Diameter 1 (mm) 93.7
Per Inch 20
Replaces "gmc 6439296; mack 25mf428, 25mf428-a; white 27-077522"
Thread 4-mar
Fits —

Cooling system filter. Helps keep coolant circulating cleanly through the system.

Integral gasket. Includes gasket G381-A for a more complete seal.

Threaded design. 4-Mar thread for straightforward installation.

$25.70Free shipping
In stock · usually ships same day before 1pm CST
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Baldwin BW5178 Cooling System Filter for Mack

The Baldwin BW5178 is a cooling system filter built for Mack engines and trucks. It is specified with a 4-3/4 thread, 5 3/8 in. height, and 3 11/16 in. outside diameter, making it a direct-fit service part for cooling system maintenance on Mack applications.

Key Features

  • Cooling system filter for Mack engines and trucks
  • Thread size: 4-3/4
  • Height: 5 3/8 in. (136.5 mm)
  • Outside diameter: 3 11/16 in. (93.7 mm)
  • Integral gasket: G381-A
  • Replaces GMC 6439296, Mack 25MF428, Mack 25MF428-A, and White 27-077522
  • Part number: BW5178

Detailed Description

Use the Baldwin BW5178 when servicing cooling systems on Mack engines and trucks that call for this filter specification. The filter’s dimensions, thread pattern, and integral gasket reference help support proper fitment during routine cooling system maintenance. If you are searching for a Baldwin BW5178 cooling system filter for Mack trucks or a Baldwin BW5178 replacement filter for Mack engines, this part matches the listed application details and cross-references common OE numbers.

This part cross-references GMC 6439296 and Mack 25MF428 for the same application.

Common Issues This Filter Helps Address

  • Cooling system contamination from suspended debris
  • Reduced filtration performance during scheduled service intervals
  • Fitment mismatch when replacing an OE cooling system filter
  • Seal concerns related to the specified integral gasket style
  • Service delays when matching Mack cooling system filter specifications

Installation Notes and Tips

Verify thread size, height, and outside diameter against the removed filter before installation. Confirm the gasket reference matches the housing specification and inspect the sealing surfaces for residue or damage. Use the BW5178 only on Mack engine and truck applications that call for this filter format.

Quality Assurance

Baldwin manufactures filtration components for heavy-duty automotive and commercial vehicle service. The BW5178 is built to the listed dimensional and application specifications for Mack cooling system maintenance.

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes