Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Cap
The fuel cap seals the inlet end of the fuel filler pipe and prevents the escape of fuel liquid and vapor. It is tethered to the fuel door on the vehicle body to prevent loss. The cap requires 1/4 turn (plus an additional 1/4 turn to activate at least three "clicks" of the ratcheting top feature) to engage the filler pipe neck during installation.
The cap also incorporates a spring-loaded, "free-spin" feature (about 150°) noted during removal.
The cap is vented to the atmosphere in both positive and negative (vacuum) pressure modes to prevent build-up of excessive pressure in the system. The cap is designed to vent at a positive pressure of about 2 psi. (60 in. H2O) and negative pressure (vacuum) of about 1 psi. (26 in. H2O).
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.