Baldwin Filters
Baldwin Filters B31 Spin-On 13/16" Thread 3-1/2" L hvac control
Spin-on oil filter with 9.8 micron rating, anti-drainback valve and 13/16"-16 thread for AMC and GM vehicles
- ColorTransparent
- Spin-on design enables quick, tool-free filter changes
- 8 micron rating traps fine contaminants for cleaner oil
- Anti-drainback valve prevents dry starts after shutdown
- G449-B gasket included for a leak-free seal
- Fits AMC and GM light-duty trucks with 13/16"-16 thread
Baldwin Filters B31 spin-on filter
The Baldwin Filters B31 is a spin-on oil filter with a 13/16" thread and a 3-1/2" length. It suits automotive and light-duty truck engines requiring a full-flow lube cartridge. The transparent housing and 9.8 micron rating support routine maintenance intervals. Buyers who need a different thread pitch or a cartridge-style element cannot use this filter.
Sustained-flow filtration performance
The full-flow design passes all engine oil through the 9.8 micron media on every cycle during extended operation. An anti-drainback valve retains oil in the canister after shutdown, delivering immediate pressure at cold start. The G449-B attached gasket maintains a consistent seal through thermal expansion and vibration. Service life follows the engine manufacturer's recommended change interval.
Straightforward spin-on installation
Installation requires hand-tightening the 13/16" thread onto the engine mounting pad until the gasket seats, then a final partial turn. The integrated G449-B gasket eliminates separate seal handling and alignment errors. Over-tightening can distort the canister or damage the thread, while under-tightening risks leaks. Clear the surrounding area for a filter wrench if removal torque becomes high.
Highlights
- Spin-on design enables quick, tool-free filter changes
- 8 micron rating traps fine contaminants for cleaner oil
- Anti-drainback valve prevents dry starts after shutdown
- G449-B gasket included for a leak-free seal
- Fits AMC and GM light-duty trucks with 13/16"-16 thread
Specifications
| Brand | BALDWIN FILTERS |
|---|---|
| Color | Transparent |
Questions about this item
How much heat does the Baldwin B31 spin-on filter generate during continuous engine operation?
The Baldwin B31 is a passive oil filter with no moving parts or electrical components, so it produces no measurable heat of its own during all-day operation.
What thread specification must the engine block have for the Baldwin B31 to install correctly?
The filter requires a 13/16"-16 thread on the engine mounting pad to match its spin-on base.
Will the Baldwin B31 fit older AMC and GM light-duty trucks that originally used a different filter height?
At 3-1/2 inches tall with a 3-inch diameter, the B31 matches the listed applications for AMC and GM automotive and light-duty truck engines.
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