The ZTSE4289A Cylinder Head Pressure Adapter Plates are a comprehensive cylinder head pressure testing kit designed to verify the integrity of cylinder heads on Navistar / International diesel engines. These adapter plates seal off the cylinder head’s coolant and thermostat passages so the head can be safely pressurized with air or fluid to check for internal cracks, porosity, or leakage that may not be visible during routine inspection. Pressure testing is a critical step in head refurbishment to ensure reliable engine operation after rebuild.
This test kit includes precision-machined block-off plates for the head, a thermostat opening block plate, and a pressure regulator with gauge that allows technicians to apply controlled pressure (commonly limited to around 30 psi for safety) and evaluate whether the cylinder head holds pressure without loss. Used as part of a complete cylinder head inspection workflow, it helps detect issues like cracks in combustion chambers or cracks between water jackets before installation.
The ZTSE4289A is engineered for use in professional diesel machine shops, engine rebuild facilities, and fleet maintenance operations handling heavy-duty/Navistar engine service tasks.
Key Features & Benefits
- Complete adapter plate kit for cylinder head pressure testing on Navistar / International diesel engines.
- Includes block-off plates for head ports and thermostat opening to allow controlled pressure testing.
- Pressure regulator and gauge enable accurate leak detection and assess head integrity.
- Helps identify internal head cracks, porosity, or leakage that dye penetrant tests might miss.
- Professional-grade construction for repeated use in heavy engine service environments.
Typical Applications
- Pressure testing cylinder heads during heavy-duty engine rebuilds or remanufacturing.
- Verification of head integrity after suspected overheating or failure.
- Diesel machine shops and professional rebuild facilities performing head service.
Why It Matters
Cracks or porosity in a cylinder head can lead to coolant leakage, combustion gas intrusion into coolant passages, overheating, and engine failure. A pressure test using a dedicated adapter plate kit like the ZTSE4289A gives technicians confidence that the head is sound before costly reinstallation and service work.
Heavy item – not eligible for free freight.