Diesel overflow spillage problem
Saturday morning I was fueling my Dodge Cummins and was topping it off for the first time in a good while when I heard fuel splattering on the concrete underneath. I thought "oh no" I'm leaking somewh...
Forum Discussion
Common for our era of truck but easy to fix.
Put your hand up on top of the tank and feel around where the fuel line and sending unit are.
You will find a plastic nipple that's about 3/8's to 1/2" diameter. This nipple is used for gas trucks and was often just left open to the air. A few, like mine are sealed but most were wide open. You can put a rubber cap on it to seal it up. Even if this weren't the problem, it's good to seal it up rather than let road spray and dirt get in. Dodge had to do a lot of repairs back n the day because of this and often soaked the customer for it.
Also, the sending unit and line connections are sealed with a mason jar style threaded ring which is often loose. Tighten this ring if you can (my truck leaked when I filled it and I was able to turn the lid almost 4 turns). Sorry but I cant remember if the nipple is the white thing in the pic below or if it was within the mason jar lid.
Here is a pic of the tank and the mason jar lid (dirty white thing).
Ram fuel tank
Put your hand up on top of the tank and feel around where the fuel line and sending unit are.
You will find a plastic nipple that's about 3/8's to 1/2" diameter. This nipple is used for gas trucks and was often just left open to the air. A few, like mine are sealed but most were wide open. You can put a rubber cap on it to seal it up. Even if this weren't the problem, it's good to seal it up rather than let road spray and dirt get in. Dodge had to do a lot of repairs back n the day because of this and often soaked the customer for it.
Also, the sending unit and line connections are sealed with a mason jar style threaded ring which is often loose. Tighten this ring if you can (my truck leaked when I filled it and I was able to turn the lid almost 4 turns). Sorry but I cant remember if the nipple is the white thing in the pic below or if it was within the mason jar lid.
Here is a pic of the tank and the mason jar lid (dirty white thing).
Ram fuel tank
