2021 Fuel cap

[QCHunter]

Hey everyone, I have a 21 Ram with the 6.7 and wanted to get a fuel cap for the diesel. My filler has 3 ribs that seem like it would keep the aftermarket caps from sealing. Has anyone been using a fuel cap in a 21 Ram?
Here is my filler.

 

[Broccoli2]

Yep, 2020's are the same and probably 19's too. I bought one on Amazon and like you said it's round and does not really fit tight. I keep meaning to look into the Mopar version. I think it's plastic and fits over the entire top where the Amazon one fits inside..

 

[boatdude1]

Geno’s Garage sells caps for them. Regular and locking. Very good quality.

 

[Camper99]

This is the one I got from Amazon.

https://www.amazon.com/dp/B088153872

It turns only a little bit to "lock"/tighten into place.

Here it is installed.



I would have ordered a cap from Geno's, but it was listed as backordered when I got this one.

 

[Sir Snacksalot]

Waiting on my back order from Genos. However I bought an $8 aluminum DEF cap with retention lanyard and it fits good


Sent from my iPhone using Tapatalk

 

[QCHunter]

This is the one I got from Amazon.

https://www.amazon.com/dp/B088153872

I turns only a little bit "lock"/tighten into place.

Here it is installed.

View attachment 14850

I would have ordered a cap from Geno's, but it was listed as backordered when I got this one.

Perfect. That’s what I was looking for. I kept looking at the cheaper caps that weren’t made for the fins inside the filler neck. I will order this to help keep dust and water out.
Thank you

 

[Dunner]

This is the one I got from Amazon.

https://www.amazon.com/dp/B088153872

It turns only a little bit to "lock"/tighten into place.

Here it is installed.

View attachment 14850

I would have ordered a cap from Geno's, but it was listed as backordered when I got this one.

I just got the same amazon cap had ordered from genos and they told me both locking and non locking would be 45 days for stock to arrive so I cancelled my order.

 

[Broccoli2]

This is the one I got from Amazon.

https://www.amazon.com/dp/B088153872

It turns only a little bit to "lock"/tighten into place.

Here it is installed.

View attachment 14850

I would have ordered a cap from Geno's, but it was listed as backordered when I got this one.

Can you post a picture of the cap upside down so we can see the part that fits inside... Does it have groves that match the inside of the fill hole? The one I got from amazon doesn't fit quite right with the "fins'

 

[Camper99]

Can you post a picture of the cap upside down so we can see the part that fits inside... Does it have groves that match the inside of the fill hole? The one I got from amazon doesn't fit quite right with the "fins'

Here are a few angles. The cap seems to push the filler neck flap open slightly, but as you can see there is an o-ring on the cap itself.