Baldwin B9 Engine Oil Filter

Baldwin B9 Engine Oil Filter

The Baldwin B9 is a spin-on engine oil filter built for classic gasoline and marine applications that call for a 13/16 thread and a 3 11/16-inch outside diameter. It includes an anti-drainback valve and an integral gasket to support oil retention at startup and a secure seal during service.

Key Features

• Part number B9 engine oil filter from Baldwin
• Anti-drainback valve helps keep oil in the filter when the engine is off
• Integral gasket included for proper sealing
• Thread size: 13/16
• Outside diameter: 3 11/16 in. (93.7 mm)
• Height: 5 3/8 in. (136.5 mm)
• Per inch: 16
• Replaces GMC 5515104 and 6435678
• Related to Baldwin B39 short version and BT112 turbo version

Detailed Description

Baldwin B9 is an engine oil filter for a wide range of older vehicles and equipment, including Jeep Cherokee, Jeep Wagoneer, Jeep CJ5, Jeep J10, and Jeep J20 applications, along with select Cadillac, Buick, Oldsmobile, Pontiac, Chrysler, GMC, International Light-Duty Trucks, Case Equipment, Allis Chalmers, and Crusader Marine uses. The filter’s dimensions and thread specification make it a direct-match service part for engines that require this format, while the anti-drainback valve supports cleaner startup oil delivery. For buyers searching Baldwin B9, Baldwin B9 oil filter, or a Jeep Cherokee oil filter replacement, this part provides a straightforward service option for the listed applications.

This part cross-references GMC 5515104 and 6435678 for the same application.

What It Helps Address

• Oil filter replacement for routine engine service
• Loss of oil retention after shutdown
• Seal issues caused by a worn or incorrect gasket
• Fitment needs for older Jeep, Pontiac, Buick, Oldsmobile, and Cadillac engines
• Service replacement for select marine and light-duty truck applications

Installation Notes and Tips

Verify the thread size, gasket sealing surface, and overall filter dimensions before installation. Confirm the engine calls for a spin-on filter with a 13/16 thread and the listed height and diameter. Pre-lubricate the gasket with clean engine oil, tighten to the manufacturer’s service specification, and check for leaks after startup. For fitment searches, this Baldwin B9 oil filter is listed for 1974-1978 Jeep Cherokee, 1974-1977 Jeep Wagoneer, 1960-1967 Cadillac DeVille, and 1960-1966 Pontiac Bonneville applications, among others.

Quality Assurance

Baldwin manufactures filtration products for automotive, truck, industrial, and marine service applications. The B9 is built to the listed dimensions and specifications for the stated vehicle and equipment coverage.