9-7X V8-5.3L (2005)
Variable Valve Timing Actuator: Testing and Inspection
Displacement on Demand (Dod) Oil Pressure Relief Valve Diagnosis and Testing
Displacement on Demand (DoD) Oil Pressure Relief Valve Diagnosis and Testing
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Tools Required
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J 21867 Pressure Gage
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J-21867-16 Oil Pressure Adapter
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J 42907 Oil Pressure Tester
1. Important: This test is performed to verify the operation of the displacement on demand (DoD) oil pressure relief valve. Refer to Displacement
on Demand (DoD) System Description and Lubrication Description (Main Pressure Below 55 psi - DoD Off) Lubrication Description (Main
Pressure Above 55 psi - DoD Off) Lubrication Description (Main Pressure Below 55 psi - DoD On) Lubrication Description (Main Pressure
Above 55 psi - DoD On).
Remove the oil filter and install the J 42907.
2. Install the J 21867 or equivalent to the J 42907.
3. Remove the oil pressure sensor and install the J-21867-16.
