Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Radiator Cap: Initial Inspection and Diagnostic Overview
1. Inspect the areas under the vacuum valve and rubber seal for rust or dirt particles.
2. Raise the vacuum valve and rubber seal and using warm tap water, thoroughly flush away loose rust or dirt particles trapped under both seal
surfaces.
3. Inspect and remove any embedded rust or dirt particles on the sealing surfaces of the rubber seals.
4. Inspect the radiator filler neck opening for rust or dirt particles on the sealing surface at the bottom of the filler neck opening. Use a clean cloth to
wipe the sealing surface, removing any rust or dirt particles. Also inspect and clean the secondary sealing surface.
5. If paint is seen on the filler neck sealing surfaces remove it using paint thinner. DO NOT scrape sealing surfaces.
