Gates
OE Equivalent Fuel Cap

Gates 31640 Fuel Tank Cap

Brand Gates 31640
Lockable No
Type Oe equivalent fuel cap
Thread Diameter 1.5
Depth 1.38
9849 Vented anti-surge
Cam Type Shallow cam
Cam Type Shallow cam
OE Comparison Rating Oe performance
Shell Diameter (in) 2.53
Venting Vented anti-surge
Product line OE Equivalent Fuel Cap
Fits Chevrolet, Ford, Lincoln, Mercedes-Benz, Mercury, and Pontiac · 200 vehicles

OE equivalent cap. Meets or exceeds OEM specifications for a direct replacement.

Heavy-duty construction. Rugged build stands up to demanding fuel system use.

Vented anti-surge. Helps control fuel movement for steadier operation.

Cross-references ATP RG-40, Febi-Bilstein 31640 and Four Seasons 46114 for the same application. See all 72.

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OE Equivalent Fuel Cap for Classic Ford and Mercury

The Gates 31640 is an OE Equivalent Fuel Cap built for a secure, factory-style seal on select classic vehicles. It is a vented anti-surge fuel tank cap with rugged construction and OE performance sizing for shallow cam filler necks.

Compatible With 1953-1970 Chevrolet, Ford, Lincoln, Mercedes-Benz, Mercury, and Pontiac applications listed below, including Ford Thunderbird, Mercury Cougar, and Chevrolet Corvette fitments.

  • OE Equivalent Fuel Cap with OE performance comparison rating
  • Vented anti-surge design for the specified applications
  • Fits shallow cam filler necks
  • Heavy-duty construction for fuel tank sealing service
  • Thread diameter: 1.5 in.; shell diameter: 2.53 in.; depth: 1.38 in.
  • Non-lockable design

Product Details and Fitment

This Gates fuel tank cap is engineered to meet or exceed OEM specifications for the listed vehicles. The Gates 31640 is specified for shallow cam filler necks and is listed as vented anti-surge, making it a direct replacement choice for classic Ford Thunderbird, Mercury Cougar, Mercury Marquis, Pontiac Bonneville, and Chevrolet Impala applications where the original cap style matches the catalog fitment.

This part cross-references ATP RG-40 and Four Seasons 46114 for the same application.

What This Fuel Cap Helps Address

  • Fuel odor from a cap that no longer seals properly
  • Evaporative fuel loss caused by a worn or incorrect cap
  • Driveability issues related to a damaged or mismatched filler-neck seal
  • Fuel tank pressure irregularities on vented anti-surge applications
  • Replacement needs for original-style caps on classic Chevrolet, Ford, Mercury, Pontiac, Lincoln, and Mercedes-Benz models

Installation Notes and Tips

Verify filler-neck style before ordering. This cap is listed for shallow cam filler necks and specific OE-equivalent applications, so match the vehicle year, make, model, and notes exactly. Confirm the cap type, venting style, and dimensions against the original part before installation. For best results, inspect the filler neck for wear, corrosion, or damage that could affect sealing.

Quality Assurance

Gates OE Equivalent Fuel Caps are built with heavy-duty construction and are specified to meet or exceed OEM requirements for the listed applications. Part number 31640 is cataloged as an OE performance replacement for the vehicles shown in the fitment data.

This part fits 200 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeTransmissionLitersCylindersFuel TypePositionNotes
1970FordLTD——5.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970FordLTD————GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970FordLTD——5.8LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970FordLTD——6.4LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970FordLTD——7.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970FordThunderbird——7.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970LincolnContinental——7.5LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryColony Park——6.4LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryColony Park——7.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryCougar——5.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryCougar——5.8LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryCougar——7.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryMarquis——6.4LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1970MercuryMarquis——7.0LV8GASN/AW/O Calif. Emission System; OE Equivalent Fuel Cap
1969FordLTD——5.0LV8GASN/AOE Equivalent Fuel Cap
1969FordLTD————GASN/AOE Equivalent Fuel Cap
1969FordLTD——5.8LV8GASN/AOE Equivalent Fuel Cap
1969FordLTD——6.4LV8GASN/AOE Equivalent Fuel Cap
1969FordLTD——7.0LV8GASN/AOE Equivalent Fuel Cap
1969FordThunderbird——7.0LV8GASN/AOE Equivalent Fuel Cap
1969MercuryColony Park——6.4LV8GASN/AOE Equivalent Fuel Cap
1969MercuryColony Park——7.0LV8GASN/AOE Equivalent Fuel Cap
1969MercuryCougar——5.8LV8GASN/AOE Equivalent Fuel Cap
1969MercuryCougar——6.4LV8GASN/AOE Equivalent Fuel Cap
1969MercuryCougar——7.0LV8GASN/AOE Equivalent Fuel Cap
1969MercuryMarquis——6.4LV8GASN/AOE Equivalent Fuel Cap
1969MercuryMarquis——7.0LV8GASN/AOE Equivalent Fuel Cap
1969MercuryMontego——4.1LL6GASN/AOE Equivalent Fuel Cap
1969MercuryMontego——5.0LV8GASN/AOE Equivalent Fuel Cap
1969MercuryMontego————GASN/AOE Equivalent Fuel Cap
1969MercuryMontego——5.8LV8GASN/AOE Equivalent Fuel Cap
1969MercuryMontego——6.4LV8GASN/AOE Equivalent Fuel Cap
1969MercuryMontego——7.0LV8GASN/AOE Equivalent Fuel Cap
1968FordLTD——5.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968FordLTD————GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968FordLTD——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968FordLTD——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968FordThunderbird——6.4LV8GASN/AOE Equivalent Fuel Cap
1968FordThunderbird——7.0LV8GASN/AOE Equivalent Fuel Cap
1968MercuryColony Park——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968MercuryColony Park——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968MercuryCougar——5.0LV8GASN/AOE Equivalent Fuel Cap
1968MercuryCougar————GASN/AOE Equivalent Fuel Cap
1968MercuryCougar——6.4LV8GASN/AOE Equivalent Fuel Cap
1968MercuryCougar——7.0LV8GASN/AOE Equivalent Fuel Cap
1968MercuryMarquis——6.4LV8GASN/AOE Equivalent Fuel Cap
1968MercuryMarquis——7.0LV8GASN/AOE Equivalent Fuel Cap
1968MercuryMontego——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968MercuryMontego——5.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968MercuryMontego————GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968MercuryMontego——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1968MercuryMontego——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967FordLTD——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967FordLTD——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967FordLTD——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967FordThunderbird——6.4LV8GASN/AOE Equivalent Fuel Cap
1967FordThunderbird——7.0LV8GASN/AOE Equivalent Fuel Cap
1967MercuryCapri——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryCapri——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryCapri——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryColony Park——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryColony Park——6.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryColony Park——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryCougar——4.7LV8GASN/AOE Equivalent Fuel Cap
1967MercuryCougar——6.4LV8GASN/AOE Equivalent Fuel Cap
1967MercuryMarquis——6.7LV8GASN/AOE Equivalent Fuel Cap
1967MercuryMarquis——7.0LV8GASN/AOE Equivalent Fuel Cap
1967MercuryVillager——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryVillager——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1967MercuryVillager——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966FordLTD——3.9LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966FordLTD——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966FordLTD——5.8LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966FordLTD——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966FordLTD——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966FordThunderbird——7.0LV8GASN/AOE Equivalent Fuel Cap
1966MercuryCapri——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryCapri——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryCapri——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryColony Park——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryColony Park——6.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryColony Park——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryMarauder——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryMarauder——6.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryMarauder——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryVillager——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryVillager——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1966MercuryVillager——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965FordLTD——3.9LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965FordLTD——4.7LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965FordLTD——5.8LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965FordLTD——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965FordLTD——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965MercuryColony Park——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965MercuryColony Park——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965MercuryMarauder——6.4LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965MercuryMarauder——7.0LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1965MercuryVillager——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1964MercuryColony Park——6.4LV8GASN/AOE Equivalent Fuel Cap
1964MercuryColony Park——7.0LV8GASN/AOE Equivalent Fuel Cap
1964MercuryMarauder——6.4LV8GASN/AOE Equivalent Fuel Cap
1964MercuryMarauder——7.0LV8GASN/AOE Equivalent Fuel Cap
1964MercuryVillager——2.8LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1964MercuryVillager——3.3LL6GASN/AExc. Wagon; OE Equivalent Fuel Cap
1964PontiacBonneville——6.4LV8GASN/AOE Equivalent Fuel Cap
1964PontiacBonneville——6.9LV8GASN/AOE Equivalent Fuel Cap
1964PontiacGrand Prix——6.4LV8GASN/AOE Equivalent Fuel Cap
1964PontiacGrand Prix——6.9LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletBel Air——3.8LL6GASN/AOE Equivalent Fuel Cap
1963ChevroletBel Air——4.6LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletBel Air——5.3LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletBel Air——6.7LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletImpala——3.8LL6GASN/AOE Equivalent Fuel Cap
1963ChevroletImpala——4.6LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletImpala——5.3LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletImpala——6.7LV8GASN/AOE Equivalent Fuel Cap
1963ChevroletImpala——7.0LV8GASN/AOE Equivalent Fuel Cap
1963Mercedes-Benz300SE—Automatic3.0LL6GASN/AOE Equivalent Fuel Cap
1963MercuryColony ParkWagon—6.4LV8GASN/AOE Equivalent Fuel Cap
1963MercuryColony ParkWagon—6.6LV8GASN/AOE Equivalent Fuel Cap
1963MercuryMarauder——6.4LV8GASN/AWagon; OE Equivalent Fuel Cap
1963MercuryMarauder——6.6LV8GASN/AWagon; OE Equivalent Fuel Cap
1963PontiacBonneville——6.4LV8GASN/AOE Equivalent Fuel Cap
1963PontiacBonneville——6.9LV8GASN/AOE Equivalent Fuel Cap
1963PontiacGrand Prix——6.4LV8GASN/AOE Equivalent Fuel Cap
1963PontiacGrand Prix——6.9LV8GASN/AOE Equivalent Fuel Cap
1963PontiacLeMans——3.2LL4GASN/AExc. Wagon; OE Equivalent Fuel Cap
1963PontiacLeMans——5.3LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1963PontiacTempest——3.2LL4GASN/AExc. Wagon; OE Equivalent Fuel Cap
1963PontiacTempest——5.3LV8GASN/AExc. Wagon; OE Equivalent Fuel Cap
1962ChevroletBel Air——3.8LL6GASN/AOE Equivalent Fuel Cap
1962ChevroletBel Air——4.6LV8GASN/AOE Equivalent Fuel Cap
1962ChevroletBel Air——5.3LV8GASN/AOE Equivalent Fuel Cap
1962ChevroletBel Air——6.7LV8GASN/AOE Equivalent Fuel Cap
1962ChevroletCorvette——5.3LV8GASN/AOE Equivalent Fuel Cap
1962ChevroletImpala——3.8LL6GASN/AOE Equivalent Fuel Cap
1962ChevroletImpala——4.6LV8GASN/AOE Equivalent Fuel Cap
1962ChevroletImpala——5.3LV8GASN/AOE Equivalent Fuel Cap
1962ChevroletImpala——6.7LV8GASN/AOE Equivalent Fuel Cap
1962MercuryColony ParkWagon—3.6LL6GASN/AOE Equivalent Fuel Cap
1962MercuryColony ParkWagon—4.8LV8GASN/AOE Equivalent Fuel Cap
1962MercuryColony ParkWagon—5.8LV8GASN/AOE Equivalent Fuel Cap
1962MercuryColony ParkWagon—6.4LV8GASN/AOE Equivalent Fuel Cap
1962PontiacBonneville——6.4LV8GASN/AOE Equivalent Fuel Cap
1962PontiacCatalina——6.9LV8GASN/AOE Equivalent Fuel Cap
1961ChevroletBel Air——3.8LL6GASN/AOE Equivalent Fuel Cap
1961ChevroletBel Air——4.6LV8GASN/AOE Equivalent Fuel Cap
1961ChevroletBel Air——5.7LV8GASN/AOE Equivalent Fuel Cap
1961ChevroletCorvette——4.6LV8GASN/AOE Equivalent Fuel Cap
1961ChevroletImpala——3.8LL6GASN/AOE Equivalent Fuel Cap
1961ChevroletImpala——4.6LV8GASN/AOE Equivalent Fuel Cap
1961ChevroletImpala——5.7LV8GASN/AOE Equivalent Fuel Cap
1961ChevroletImpala——6.7LV8GASN/AOE Equivalent Fuel Cap
1961MercuryColony ParkWagon—4.8LV8GASN/AOE Equivalent Fuel Cap
1961MercuryColony ParkWagon—5.8LV8GASN/AOE Equivalent Fuel Cap
1961MercuryColony ParkWagon—6.4LV8GASN/AOE Equivalent Fuel Cap
1961PontiacBonneville——6.4LV8GASN/AOE Equivalent Fuel Cap
1961PontiacCatalina——6.9LV8GASN/AOE Equivalent Fuel Cap
1960ChevroletBel Air——3.8LL6GASN/AOE Equivalent Fuel Cap
1960ChevroletBel Air——3.9LL6GASN/AOE Equivalent Fuel Cap
1960ChevroletBel Air——4.6LV8GASN/AOE Equivalent Fuel Cap
1960ChevroletBel Air——5.7LV8GASN/AOE Equivalent Fuel Cap
1960ChevroletCorvette——4.6LV8GASN/AOE Equivalent Fuel Cap
1960ChevroletImpala——3.8LL6GASN/AOE Equivalent Fuel Cap
1960ChevroletImpala——4.6LV8GASN/AOE Equivalent Fuel Cap
1960ChevroletImpala——5.7LV8GASN/AOE Equivalent Fuel Cap
1960FordThunderbird——5.8LV8GASN/AOE Equivalent Fuel Cap
1960FordThunderbird——7.0LV8GASN/AOE Equivalent Fuel Cap
1960PontiacBonneville——6.4LV8GASN/AOE Equivalent Fuel Cap
1959ChevroletBel Air——3.8LL6GASN/AOE Equivalent Fuel Cap
1959ChevroletBel Air——4.6LV8GASN/AOE Equivalent Fuel Cap
1959ChevroletBel Air——5.7LV8GASN/AOE Equivalent Fuel Cap
1959ChevroletCorvette——4.6LV8GASN/AOE Equivalent Fuel Cap
1959ChevroletImpala——3.8LL6GASN/AOE Equivalent Fuel Cap
1959ChevroletImpala——4.6LV8GASN/AOE Equivalent Fuel Cap
1959ChevroletImpala——5.7LV8GASN/AOE Equivalent Fuel Cap
1959FordThunderbird——5.8LV8GASN/AOE Equivalent Fuel Cap
1959FordThunderbird——7.0LV8GASN/AOE Equivalent Fuel Cap
1959PontiacBonneville——6.4LV8GASN/AOE Equivalent Fuel Cap
1958ChevroletBel Air——3.8LL6GASN/AOE Equivalent Fuel Cap
1958ChevroletBel Air——4.6LV8GASN/AOE Equivalent Fuel Cap
1958ChevroletBel Air——5.7LV8GASN/AOE Equivalent Fuel Cap
1958ChevroletCorvette——4.6LV8GASN/AOE Equivalent Fuel Cap
1958ChevroletImpala——3.8LL6GASN/AOE Equivalent Fuel Cap
1958ChevroletImpala——4.6LV8GASN/AOE Equivalent Fuel Cap
1958ChevroletImpala——5.7LV8GASN/AOE Equivalent Fuel Cap
1958FordThunderbird——5.8LV8GASN/AOE Equivalent Fuel Cap
1958PontiacBonneville——6.1LV8GASN/AOE Equivalent Fuel Cap
1957ChevroletCorvette——4.6LV8GASN/AOE Equivalent Fuel Cap
1957FordThunderbird——4.8LV8GASN/AOE Equivalent Fuel Cap
1957FordThunderbird——5.1LV8GASN/AOE Equivalent Fuel Cap
1956ChevroletCorvette——4.3LV8GASN/AOE Equivalent Fuel Cap
1956FordThunderbird——4.8LV8GASN/AOE Equivalent Fuel Cap
1956FordThunderbird——5.1LV8GASN/AOE Equivalent Fuel Cap
1955ChevroletCorvette——3.8LL6GASN/AOE Equivalent Fuel Cap
1955ChevroletCorvette——4.3LV8GASN/AOE Equivalent Fuel Cap
1955FordThunderbird——4.8LV8GASN/AOE Equivalent Fuel Cap
1954ChevroletCorvette——3.8LL6GASN/AOE Equivalent Fuel Cap
1953ChevroletCorvette——3.8LL6GASN/AOE Equivalent Fuel Cap
1953ChevroletCorvette——3.9LL6GASN/AOE Equivalent Fuel Cap
Directly replaces or cross-references 72 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ATP — RG-40Febi-Bilstein — 31640Four Seasons — 46114SKF — 10640SKF — 116403-E-303-E-383-E-403-GF-303-GF-384-11124-11534-39064-39088-9420-303-112F1353-2107177-51977-524703-1031703-10333401362011638144366410362641036314002439211201551AS6AB9AZ 9030 ABF-30BF-38BG-30BG-30ABG-36BG-38BG-40C-30C-38C6GY 9030 AC7AZ 9030 ADGF-30DGF-38DGF-40DGF40EG-30EG-30AEG-38EG-40AFC-30G-30G-30AG-38G-40G-40AGT-4GT-34GT-40AGT-62GT-63MFG-30MFG-38MGC-40PG-40ARG-30RG-30ARG-40AW22-106WG-30WG-30AWG-38WG-40