Baldwin BT425 vs Baldwin BT424: Oil Filter Compatibility
Compare Baldwin BT425 and Baldwin BT424 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 11/2-16 thread.
Quick verdict
Closest known dimensional difference: height -50 mm. Verify application-specific requirements before substituting.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Baldwin BT425 and Baldwin BT424 specifications
How matching is scored| Specification | Baldwin BT425 | Baldwin BT424 |
|---|---|---|
| Thread size | 11/2-16 | 11/2-16 |
| Gasket OD | 126.6 mm | 126.6 mm |
| Gasket ID | 118.3 mm | 118.3 mm |
| Can OD | 128.6 mm | 127.8 mm |
| Height | 227 mm | 177 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 9 | 10 |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 11/2-16.
Gasket OD is identical at 126.6 mm.
Gasket ID is identical at 118.3 mm.
Baldwin BT425 is 50 mm taller (Baldwin BT425: 227 mm, Baldwin BT424: 177 mm) -- check clearance before substituting.
Can OD differs by 0.8 mm (Baldwin BT425: 128.6 mm, Baldwin BT424: 127.8 mm).
Both open their bypass valve in a comparable range: Baldwin BT425 at 9-9 psi, Baldwin BT424 at 10-10 psi -- these ranges do not overlap.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.