fuel

Fuel Cap

for 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD

Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Mechanic · 20+ years

Difficulty

Easy

Time

12 min

Tools

Steps

✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.

Replace the fuel cap on a 2014 Ram 2500 with 6.7L Cummins diesel engine to restore proper fuel tank sealing and prevent evaporative emissions.

Warnings

⚠Do not perform this procedure near open flames or sparks due to fuel vapor presence

ℹ️A faulty fuel cap can trigger the check engine light with EVAP system codes

Tools required

Work gloves

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Parts

Fuel cap × 1 — OEM Mopar fuel cap or equivalent

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level ground and turn off engine
Allow fuel filler neck area to cool if vehicle was recently driven
Locate fuel filler door on driver side rear of vehicle

Procedure

1
Open fuel filler door
Press the center of the fuel filler door on the driver side rear quarter panel to release the spring-loaded latch and open the door fully.
2
Remove old fuel cap
Turn the existing fuel cap counterclockwise (left) until it releases from the filler neck. The cap will click and disengage after approximately 1-2 full turns. Pull the cap away from the filler neck. If the cap has a tether, it will remain attached to the filler door.
3
Inspect filler neck
Visually inspect the fuel filler neck threads and sealing surface for damage, debris, or corrosion. Clean any debris with a clean cloth if necessary. Check the tether attachment point on the filler door for damage if replacing a tethered cap.
4
Install new fuel cap
Align the new fuel cap with the filler neck opening. If the cap has a tether, ensure it is properly attached to the filler door mount. Push the cap onto the filler neck and turn clockwise (right) until you hear and feel multiple clicks, typically 3-4 clicks. This ensures proper sealing.
5
Verify installation
Tug gently on the installed cap to confirm it is fully seated and secure. The cap should not pull off or feel loose. Close the fuel filler door by pressing it shut until it latches.

Reassembly

Ensure fuel filler door latches securely after closing
If check engine light was on due to EVAP leak, it may take several drive cycles to clear the code

Verification

Confirm fuel cap clicks multiple times when tightened and is secure
Verify fuel filler door closes and latches properly
Check for absence of fuel odor around filler neck area
If applicable, monitor for check engine light after several drive cycles to confirm EVAP system integrity

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