DEF

Hey guys have a small leak under truck looks like it’s coming from the diesel exhaust tank, big problem?

Hey guys have a small leak under truck looks like it’s coming from the diesel exhaust tank, big problem?

No fluid leak is good. Get it into the shop and have it looked at. May not be a "big" problem but you won't know unless someone checks it out.

Temporary patch until you get to the shop...rub a bar of soap over the hole if you see it...soap will fill the hole, works on a fuel tank also

Temporary patch until you get to the shop...rub a bar of soap over the hole if you see it...soap will fill the hole, works on a fuel tank also

I dunno, Parrothead. DEF is mostly water. And I bet you have used soap and water together, haven't you?

If it's a small, drip-drip leak, just let your company breakdown people know. If it's a dribble or worse, let them know right now.

DEF is water and urea. So it simply smells bad. But do get the leak fixed.

Interesting, I had to read up on DEF and educate myself as this is something new since the last time I drove truck!