Silly diesel cap

[geekything]

What's with the flimsy green tank cap? I can understand it on the DEF spout given that doesn't get filled up much but on the main fuel spout?

 

[MADDOG]

Yup...got rid of mine and got a nice aluminum locking one from Geno's Garage.

 

[Kapt]

MIne didn't even come with the flimsy green cap. I also bought the aluminum one

 

[geekything]

Yup...got rid of mine and got a nice aluminum locking one from Geno's Garage.

Thanks for the tip!

 

[Typetwelve]

Dumb question...but does the system really need one? I chucked that green plastic cap back in Jan of 2018...haven't ran one since.

 

[geekything]

Dumb question...but does the system really need one? I chucked that green plastic cap back in Jan of 2018...haven't ran one since.

I just found a video that heavily insinuates that you don't need the green cap. The outside flap of the fuel tank has a rubber liner to stop things getting in, and the metal flap is supposed to moderately seal the tank (diesel doesn't have the nasty quirk of not running when the gas cap is off!).

I'd still like one of those aluminum caps, though. I don't mind keeping the crappy plastic one on DEF.

 

[MADDOG]

From what I've read you don't need one for the fuel system to function properly.

I wanted one to keep the fuel thieves out of my truck.

 

[Raymond1050]

You guys know there is a second flap in the filler pipe.

 

[Kapt]

You guys know there is a second flap in the filler pipe.

I do

 

[RAM DRVR]

Aluminum cap set from amazon, $10.
https://www.amazon.com/dp/B01NCAH0E...olid=13B5C5Z0K4WDR&psc=0&ref_=lv_ov_lig_dp_it

 

[17CrewCab1500]

I love how people go nuts cause there are no caps etc.

 

[LouM]

I love how people go nuts cause there are no caps etc.

I installed caps in mine right after I bought it. I drive in fields and dirt roads frequently. I have seen the dust, dirt, mud and snow and ice that accumulates in that pocket.
I know that having a cap has keep crap from getting into my fuel and def tanks.

 

[geekything]

I installed caps in mine right after I bought it. I drive in fields and dirt roads frequently. I have seen the dust, dirt, mud and snow and ice that accumulates in that pocket.
I know that having a cap has keep crap from getting into my fuel and def tanks.

I'm in Ontario, land of road salt. I absolutely guarantee that some would manage to find it's way into my tank even with the rubber seal on the fuel flap!

 

[Kapt]

I'm in Ontario, land of road salt. I absolutely guarantee that some would manage to find it's way into my tank even with the rubber seal on the fuel flap!

There is a second flap in the filler neck that keeps stuff from getting in your tank. Never a bad thing to be careful though. That's why I bought the aluminum one

 

[LouM]

Yea, but anything on the first cap that falls thru or gets knocked in by the filler pipe is going to get in, and melted snow and slush splashed up of the road that gets past the filler door has a good chance of getting in the tank.

 

[Kapt]

Yea, but anything on the first cap that falls thru or gets knocked in by the filler pipe is going to get in, and melted snow and slush splashed up of the road that gets past the filler door has a good chance of getting in the tank.

Except that there is a second flap in the filler neck (Not the DEF neck. Always keep a cap on that!) that keeps crud from getting in there, and I'm not counting the filler door

 

[LouM]

Except that there is a second flap in the filler neck (Not the DEF neck. Always keep a cap on that!) that keeps crud from getting in there, and I'm not counting the filler door

7
Yea but the filler pipe is knocking both those flaps open and anything in there is going in the tank.

 

[WY-Dave]

You guys know there is a second flap in the filler pipe.

I found out the hard way when I tried to add anti-gel without a funnel by using a pen to hold open the flap haha

 

[WY-Dave]

Green cap? did they change colors? I had this red cap
View media item 27199
then the $10 set
View media item 27200

 

[Kapt]

7
Yea but the filler pipe is knocking both those flaps open and anything in there is going in the tank.

The second flap has an opening that is supposed to dump out the crud while keeping it out of the tank. That's the design idea anyway