Bosch 3331 vs Champ PH47: Oil Filter Compatibility
Compare Bosch 3331 and Champ PH47 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 M18x1.5 thread.
Quick verdict
Both use a M18x1.5 thread.
- 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 3331 and Champ PH47 specifications
How matching is scored| Specification | Bosch 3331 | Champ PH47 |
|---|---|---|
| Thread size | M18x1.5 | M18x1.5 |
| Gasket OD | 71 mm | 70.6 mm |
| Gasket ID | 62 mm | 62.2 mm |
| Can OD | 75.01 mm | 76.2 mm |
| Height | 85.34 mm | 88.9 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M18x1.5.
Gasket OD differs by 0.4 mm (Bosch 3331: 71 mm, Champ PH47: 70.6 mm).
Gasket ID differs by 0.2 mm (Bosch 3331: 62 mm, Champ PH47: 62.2 mm).
Champ PH47 is 3.6 mm taller (Bosch 3331: 85.34 mm, Champ PH47: 88.9 mm) -- check clearance before substituting.
Can OD differs by 1.2 mm (Bosch 3331: 75.01 mm, Champ PH47: 76.2 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.