Titan 4WD V8-5.6L (VK56DE) (2006)
Radiator Cap: Testing and Inspection
CHECKING RADIATOR CAP
Inspect the radiator cap.
NOTE: Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
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Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
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Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the metal retainer.