The 373-4830 Oil Cooler Test Plates are a specialized diagnostic tool set designed to isolate and pressure test engine oil coolers on Caterpillar on-highway engines used in the CT660 platform.
These plates are installed in place of oil cooler connections to seal off ports, allowing technicians to perform controlled pressure testing and accurately diagnose:
- Internal oil cooler leaks
- Oil-to-coolant or coolant-to-oil contamination
- Hidden cooler core failures
Originally specified for the CAT CT660 truck platform, this tool applies to engines sharing the same oil cooler design, including:
- CAT CT11, CT13, CT15 engines
- Navistar MaxxForce 11, 13, 15 (shared platform design)
Key Features & Benefits
- Designed for CAT CT660 on-highway engine applications
- Fits CT11, CT13, CT15 and equivalent MaxxForce platforms
- Allows accurate oil cooler pressure testing
- Detects internal leaks and cross-contamination
- Prevents misdiagnosis of engine issues
- Secure sealing for reliable test results
- Durable construction for repeated professional use
Typical Applications
- Oil cooler pressure testing
- Cooling system diagnostics
- Engine rebuild inspection
- Troubleshooting oil/coolant contamination
- On-highway diesel engine service
Why It Matters
Oil cooler failures often mimic major engine problems like head gasket issues. Without proper testing, this can lead to:
- Unnecessary teardown
- Misdiagnosis
- Increased downtime
The 373-4830 test plates allow technicians to confirm oil cooler condition quickly and accurately, saving time and avoiding costly mistakes.