Dorman 996-1001 Engine Oil Separator

In stock
SKU: 591|9961001
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Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price $595.15
Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.

Product details

  • SKU 591|9961001
  • Barcode #N/A

Product Description

This crankcase breather repair kit directly replaces the crankcase breather element on specific vehicles. It features the exact fit, function and performance as the factory part, and can potentially save you time and money if the OEM dealership only has the complete breather assembly, forcing you to also buy the lower aluminum housing, even if that isn't the failure point. The separator can fail on its own, either by clogging, cracking, or having a separator bearing fail from age and wear, which is indicated by noise and vibration. Excessive oil mist from the gas outlet can also be a failed separator symptom. When any of those failures occur, you can replace the separator with this kit, reducing part costs and install time by not having to replace the lower housing on the engine block.

  • OEM quality - this replacement crankcase breather element matches the fit, function and performance of the original oil separator on specific vehicles for a trustworthy fix
  • Saves time and money - many dealerships only stock this oil separator as part of the complete assembly with the lower housing; replacing only the failed element saves money and installation time
  • Effective design - engineered and manufactured to efficiently and effectively filter blow-by gases, clearing DTCs, reducing contaminants, and restoring proper engine function
  • Install tip - to ensure a tight, effective connection, be sure to clean the sealing surfaces on the lower housing where the seals are seated, before installing the new separator

Detailed Applications

Year Make Model Configuration Positions Application Notes
2022 Mack Anthem Engine Desg. MP8; EngineMfr Mack
2022 Mack Granite Engine Desg. MP8; EngineMfr Mack
2022 Mack Pinnacle Engine Desg. MP8; EngineMfr Mack
2021 Mack Anthem Engine Desg. MP8; EngineMfr Mack
2021 Mack Granite Engine Desg. MP8; EngineMfr Mack
2021 Mack Pinnacle Engine Desg. MP8; EngineMfr Mack
2021 Mack TerraPro Engine Desg. MP8; EngineMfr Mack
2020 Mack Anthem Engine Desg. MP8; EngineMfr Mack
2020 Mack Granite Engine Desg. MP8; EngineMfr Mack
2020 Mack Pinnacle Engine Desg. MP8; EngineMfr Mack
2020 Mack TerraPro Engine Desg. MP8; EngineMfr Mack
2019 Mack Anthem Engine Desg. MP8; EngineMfr Mack
2019 Mack CHU Engine Desg. MP8; EngineMfr Mack
2019 Mack CXU Engine Desg. MP8; EngineMfr Mack
2019 Mack Granite Engine Desg. MP8; EngineMfr Mack
2019 Mack GU7 Engine Desg. MP8; EngineMfr Mack
2019 Mack GU8 Engine Desg. MP8; EngineMfr Mack
2019 Mack Pinnacle Engine Desg. MP8; EngineMfr Mack
2019 Mack TerraPro Engine Desg. MP8; EngineMfr Mack
2018 Mack Anthem Engine Desg. MP8; EngineMfr Mack
2018 Mack CHU Engine Desg. MP8; EngineMfr Mack
2018 Mack CXU Engine Desg. MP8; EngineMfr Mack
2018 Mack GU7 Engine Desg. MP8; EngineMfr Mack
2018 Mack GU8 Engine Desg. MP8; EngineMfr Mack
2018 Mack MRU Engine Desg. MP8; EngineMfr Mack
2018 Mack Pinnacle Engine Desg. MP8; EngineMfr Mack
2017 Mack CHU Engine Desg. MP8; EngineMfr Mack
2017 Mack CXU Engine Desg. MP8; EngineMfr Mack
2017 Mack GU7 Engine Desg. MP8; EngineMfr Mack
2017 Mack GU8 Engine Desg. MP8; EngineMfr Mack
2017 Mack MRU Engine Desg. MP8; EngineMfr Mack
2016 IC Corporation CE Commercial Engine Desg. MaxxForce DT; EngineMfr International
2016 IC Corporation CE School Bus Engine Desg. MaxxForce DT; EngineMfr International
2016 Mack CHU Engine Desg. MP8; EngineMfr Mack
2016 Mack CXU Engine Desg. MP8; EngineMfr Mack
2016 Mack GU7 Engine Desg. MP8; EngineMfr Mack
2016 Mack GU8 Engine Desg. MP8; EngineMfr Mack
2016 Mack MRU Engine Desg. MP8; EngineMfr Mack
2015 IC Corporation 1300 FBC Engine Desg. MaxxForce DT; EngineMfr International
2015 IC Corporation CE Commercial Engine Desg. MaxxForce DT; EngineMfr International
2015 IC Corporation CE School Bus Engine Desg. MaxxForce DT; EngineMfr International
2015 Mack CHU Engine Desg. MP8; EngineMfr Mack
2015 Mack CXU Engine Desg. MP8; EngineMfr Mack
2015 Mack GU7 Engine Desg. MP8; EngineMfr Mack
2015 Mack GU8 Engine Desg. MP8; EngineMfr Mack
2015 Mack MRU Engine Desg. MP8; EngineMfr Mack
2014 Freightliner 122SD Engine Desg. DD15; EngineMfr Detroit Diesel
2014 Freightliner Cascadia Engine Desg. DD15; EngineMfr Detroit Diesel
2014 Freightliner Coronado Engine Desg. DD15; EngineMfr Detroit Diesel
2014 IC Corporation 1300 FBC Engine Desg. MaxxForce DT; EngineMfr International
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Product Specifications

Grade Type: Regular
Package Contents: 1 Crankcase Ventilation Filter
Port Length: 3 in
Port Outside Diameter: 2.286 in
Port Quantity: 2
Port Type: Flanged
Port Width: 3 in

OE Numbers

DIRECT OE CROSS
20499419 VOLVO
20566628 MACK
21098264 MACK
21122539 MACK
21122541 VOLVO
21475228 VOLVO
3888808 MACK
3888896 MACK
7093618C91 NAVISTAR
7093618C92 NAVISTAR
9009483 DAIMLER