Fuel Tank Cap for 1966-1969 Jeep CJ Series & More - Gates 31625

Seal the filler neck and keep your classic's fuel system breathing correctly with the Gates Fuel Tank Cap 31625. This OE-equivalent cap is a direct-fit replacement for many vintage vehicles, including the 1966-1969 Jeep CJ Series, the 1948-1950 Ford F-1 and the 1951-1953 Hudson Hornet. See the "Vehicles it fits" section for the full list.

• Two-way relief valve: a pressure-relief/vacuum-relief action lets the fuel tank "breathe" while helping keep fuel fumes from escaping.
• Fuel-resistant seal: the sealing gasket is compounded from fuel-resistant rubber to close off the filler neck.
• Rugged construction: built to OE-level standards with rugged, heavy-duty construction.
• OE-equivalent replacement: Gates lists the 31625 as an OE-equivalent fuel tank cap that installs in place of the original on the listed applications.

The fuel tank cap seats on the filler neck to close off the tank while its two-way valve regulates pressure and vacuum as fuel is drawn down and temperatures change. If the original cap's seal has hardened, cracked, or lost its grip, fuel vapors can escape and the tank may not hold proper pressure — signs this cap may need replacing. Diagnose the cause first; if a failed cap is the issue, this Gates unit installs in place of the worn original on the listed applications.

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