Bosch 3325 vs Champ PH3682: Oil Filter Compatibility
Compare Bosch 3325 and Champ PH3682 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 3/4-16 thread.
Quick verdict
Closest known dimensional difference: height -12.7 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.
Bosch 3325 and Champ PH3682 specifications
How matching is scored| Specification | Bosch 3325 | Champ PH3682 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 63 mm | 63 mm |
| Gasket ID | 52 mm | 52.1 mm |
| Can OD | 68 mm | 82.04 mm |
| Height | 89.41 mm | 102.11 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 12 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD is identical at 63 mm.
Gasket ID differs by 0.1 mm (Bosch 3325: 52 mm, Champ PH3682: 52.1 mm).
Champ PH3682 is 12.7 mm taller (Bosch 3325: 89.41 mm, Champ PH3682: 102.11 mm) -- check clearance before substituting.
Can OD differs by 14 mm (Bosch 3325: 68 mm, Champ PH3682: 82.04 mm).
Both open their bypass valve in a comparable range: Bosch 3325 at 12-15 psi, Champ PH3682 at 12-12 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.