Fuel Cap Leaks - 2017 RAM Cummins 3500?

[Tommy Brasher]

Has anyone changed to a screw-on fuel cap on a 2017 RAM 3500?

I filled up with fuel and always stopped when it clicked off.

I stopped within one block for lunch on a 96-degree day.

When I returned to my truck, fuel was coming out of my fill neck, I was also backed on a hill, and fuel was to my front bumper, a Mega Cab.

I know my 2006 had a screw-on fuel cap, and I never had this problem with that truck.

Thanks,
Tommy

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[watersupply189]

Has anyone changed to a screw-on fuel cap on a 2017 RAM 3500?

I filled up with fuel and always stopped when it clicked off.

I stopped within one block for lunch on a 96-degree day.

When I returned to my truck, fuel was coming out of my fill neck, I was also backed on a hill, and fuel was to my front bumper, a Mega Cab.

I know my 2006 had a screw-on fuel cap, and I never had this problem with that truck.

Thanks,
Tommy

I think the screw-on cap is not allowing your tank to ventilate, causing an expansion inside your tank which can cause the fuel to leak out.


2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

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[Tommy Brasher]

Hi, on my 2017 RAM, I have a rubber plug for a fuel cap, and it is pushing out fuel.

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[AK Bob]

Hi, on my 2017 RAM, I have a rubber plug for a fuel cap, and it is pushing out fuel.

It sounds like your fuel tank vent tube is plugged.

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[watersupply189]

Hi, on my 2017 RAM, I have a rubber plug for a fuel cap, and it is pushing out fuel.

I misread the post thinking you did install a screw cap.

I have the plastic plug that came with my 2016 truck when new with no issues.

As AK Bob stated, your vent tube could be blocked.


2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

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[F350Cummins]

I am running an aftermarket aluminum cap held in by an O-ring and friction.

I ran it in 2016 for 100K miles, and it has been on my 2014 since I got it.

one like this

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