Powertrain

Fuel Tank Cap — CJ340

Locking fuel tank cap for the CJ340 Willys Jeep, supplied with two keys and a hinged keyhole cover.

Fits	CJ340 · locking, with keys
Category	Powertrain
Details	Locking cap with hinged keyhole cover · Cap with two keys
Also searched as	CJ340 fuel cap, Willys Jeep diesel tank cap, tapa de tanque de combustible CJ340, tapa con llave
Condition	Export grade
Availability	Export — quote within 24 hours
Supplied by	Nonu Ventures

Contact Nonu Ventures →

Price, availability and shipping for this part are handled by Nonu Ventures, the exporter. The button opens this same part on their site.

This part is also listed for the Mahindra MM540: view the Mahindra MM540 page →

More than a lid

A fuel cap has to seal against fuel surge and still let the tank breathe as the level drops. A cap whose seal has hardened lets diesel weep out over rough ground; one that cannot vent creates a vacuum that starves the lift pump and gives fuel starvation on a long run — cured briefly, and confusingly, by opening the cap.

The hinged cover over the keyhole is there to keep dust and water out of the lock. It is a small thing that decides whether the cap still turns freely in five years.

Fitting and keys

Check the sealing face on the filler neck before fitting. A new cap cannot seal against a rim that is dented or rusted, and that is a common finding on a vehicle of this age.

The cap comes with its own two keys and is not matched to the ignition or the doors. Keep the spare somewhere other than the glovebox.

Questions about this part

What does the Fuel Tank Cap fit?

It is listed for the CJ340. Quote your chassis number when you enquire so fitment can be checked.

How do I order the Fuel Tank Cap?

Use the “Contact Nonu Ventures” button. Nonu Ventures is the exporter: send them the part number, the quantity and your destination and they quote within 24 hours, shipping worldwide.