Crankcase Breather Filter CV50633 / CV50634 for Cummins ISX & ISM Engines
CV50633/CV50634 crankcase breather filter for Cummins ISX and ISM engines. OEM cross-reference verified. Bulk orders from IXIN Filter.
Description
This CV50633 crankcase breather filter is a coalescing crankcase ventilation (CCV) element engineered as a direct replacement for the Cummins CV50633 and CV50634, used across Cummins ISX and ISM engines found in Kenworth, Freightliner, Peterbilt, Navistar/International, Western Star, and Volvo trucks. It’s designed to separate oil mist from crankcase blow-by gases before they recirculate back into the engine’s intake system.
Important: CV50633 and CV50634 Are Not Interchangeable
While these two part numbers are often listed together, they are specified for different engine production years, not used as a matched pair or freely interchangeable substitutes. Based on published fitment data, CV50633 is generally specified for 2009 and earlier ISX/ISM engines, while CV50634 is specified for 2010 and newer ISX/ISM engines. Please confirm your specific engine’s production year and OEM part number before ordering, particularly for bulk purchases across multiple truck models or years.
Product Overview
The CV50633/CV50634 crankcase breather filter uses coalescing filter media designed to separate oil droplets from crankcase blow-by gases, helping keep oil mist from recirculating into the turbocharger, charge air cooler, and intake manifold. As explained in this overview of crankcase ventilation systems, blow-by gases accumulate in the crankcase during normal engine operation and must be filtered before being routed back into the intake, since unfiltered oil mist can foul sensitive turbocharger and intake components over time. A clogged or degraded crankcase filter can allow crankcase pressure to build, which may lead to seal damage if not replaced at the recommended interval. Each unit is dimensionally verified against OEM measurements and tested for filtration performance before shipment — not just matched by part number.
Fits the Following Engines & Truck Models
| Category | Applications |
|---|---|
| Engines | Cummins ISX, ISM (production year determines CV50633 vs. CV50634 — see note above) |
| Truck Brands | Kenworth, Freightliner, Peterbilt, Navistar/International, Western Star, Volvo, Spartan Motors, Oshkosh Motor Truck Co., American LaFrance |
Always confirm your specific engine’s production year and serial number against the OEM cross-reference before ordering, since crankcase filter specifications differ between ISX/ISM production eras.
OEM Cross-Reference Numbers
| Brand | Number |
|---|---|
| Cummins / Fleetguard | CV50633, CV50634, CV5063300, CV5063400, CV50617, CV50031, CV50601, CV50607, CV15000, CV50633FLG |
| Cummins (Engine Part) | 3691476, 904-7904, 4312011, 4312013, 3685528, 3683918, 3691687 |
| Other Cross-Reference | 99340, 220124, CB57, WS10124, SS10124 |
Key Features
- Coalescing filter media, designed to separate oil mist from crankcase blow-by gases before recirculation
- Protects turbocharger, charge air cooler, and intake manifold from oil contamination carried by blow-by gases
- Dimensionally verified against OEM specifications, not just cross-reference number matching
- Consistent batch quality control, with raw material and pre-shipment testing on every production run
- Broad application coverage, spanning Cummins ISX/ISM engines across multiple major truck brands
Specifications
Note: independent public sources confirmed the cross-reference numbers, engine applications, and service interval data for this part, but consistent physical dimension data (diameter, length) was not available across the sources checked. Please confirm exact filter dimensions with your technical team or against the OEM part before finalizing production specifications.
| Spec | Detail |
|---|---|
| Filter Type | Coalescing crankcase ventilation (CCV) element |
| Filter Media | Coalescing |
| Recommended Service Interval | Approximately 50,000-67,500 miles for on-highway use; shorter intervals (around 1,000-1,500 hours) for transit, refuse, and school bus applications — always confirm against the specific engine’s maintenance schedule |
| Application | Cummins ISX/ISM engines |
| Dimensions | Not independently confirmed — verify against OEM part before production |
| Packaging Options | Standard retail box, bulk carton, or private-label packaging available |
Why Source This Crankcase Filter from IXIN Filter
We manufacture this CV50633/CV50634 crankcase breather filter in our own production facility, with quality control checkpoints from raw material inspection through final pre-shipment testing. If you’re sourcing for a distribution business, truck parts retailer, or fleet, we can provide:
- Sample units for independent testing before a bulk order
- Documentation on OEM cross-reference verification
- Flexible MOQ and private-label packaging options
- Consistent batch-to-batch quality for repeat orders
Frequently Asked Questions
What does a crankcase breather filter do? It separates oil mist from the gases that blow past the piston rings into the crankcase (blow-by gases), preventing that oil from recirculating into the turbocharger, charge air cooler, and intake manifold, while also helping regulate crankcase pressure.
Should I order CV50633 or CV50634 for my truck? This depends on your engine’s production year. CV50633 is generally specified for 2009 and earlier ISX/ISM engines, while CV50634 is specified for 2010 and newer engines. Confirm your engine’s exact configuration before ordering.
How often should this filter be replaced? Published service intervals are approximately 50,000-67,500 miles for on-highway trucks, with shorter interval recommendations (around 1,000-1,500 hours) for transit, refuse, and school bus applications. Always follow the specific engine manufacturer’s maintenance schedule.
Do you offer samples before a bulk order? Yes. We recommend requesting a sample for independent testing before committing to a bulk order, especially for first-time buyers.
Ready to order or request a sample? Contact IXIN Filter for pricing, MOQ, and lead time on the CV50633/CV50634 crankcase breather filter.
