The M20100 Cummins BC3 w/ Jacobs Oil Stopper is a specialized service tool designed for controlling and isolating engine oil flow during maintenance on Cummins BC3 engines equipped with Jacobs Vehicle Systems (Jacobs brake) systems.
When servicing valve train components—particularly in engines equipped with engine brakes—oil flow to the rocker housing and brake assemblies must be properly managed. The M20100 functions as an oil stopper, allowing technicians to temporarily block or control oil passages during service procedures.
This is critical when working on:
- Jacobs brake housings
- Rocker arms and valve train assemblies
- Cylinder head service operations
Without proper oil control, technicians may encounter:
- Excessive oil spillage
- Contamination of components during disassembly
- Difficulty maintaining a clean working environment
The M20100 is designed to fit precisely within the BC3 oil passage system, providing a secure seal that prevents uncontrolled oil flow while allowing service work to proceed efficiently. Its application-specific design ensures compatibility with Cummins BC3 platforms using Jacobs engine brake systems.
Constructed from durable, oil-resistant materials, the tool is built for repeated use in professional diesel repair environments where clean, controlled service conditions are essential.
Key Features & Benefits
- Designed for Cummins BC3 Engines: Specifically configured for BC3 applications
- Compatible with Jacobs Brake Systems: Enables safe service of engine brake-equipped engines
- Oil Flow Control: Prevents oil spillage during valve train and head service
- Improves Cleanliness: Maintains controlled work environment
- Secure Fitment: Seals oil passages effectively during service
- Prevents Contamination: Protects components from oil exposure during disassembly
- Durable Construction: Built for repeated professional use
Typical Applications
- Jacobs brake system service and maintenance
- Valve train and rocker arm service
- Cylinder head removal and installation
- Engine brake housing repairs
- Engine overhaul procedures on BC3 platforms
Why It Matters
Engines equipped with Jacobs brake systems rely on pressurized oil for operation. During service, uncontrolled oil flow can create:
- Messy work conditions
- Increased risk of contamination
- Reduced service efficiency
The M20100 provides a simple but critical solution by isolating oil flow where needed. This allows technicians to:
- Work cleaner and faster
- Maintain control during disassembly
- Reduce cleanup and rework time
In professional diesel environments, tools like this directly impact productivity and service quality.