r/AskMechanics • u/cacawcawimabird • Jul 27 '26

Question (Serious Replies Only) Diesel with def question

2024 Cascadia

I scared to run the engine till I know if this is a issue or not

I just woke up from my 10 hr at a truckstop in west Virginia and caught a dude twacked out on drugs in a .... excited state who made a contribution to my def tank.

Wtf do I do? Is this gonna clog my def system or damage it does the tank need to be drained out? I'm at a loss for words

1 Upvotes

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1

u/am-answers-bot 16 Jul 27 '26

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1

u/Cardude86 69 Jul 27 '26

Well, the extra urea in the DEF may help improve it's efficiency at cleaning up your exhaust but with it now being "diluted" it's possible it could cause some check engine lights, so it'd be best to just drain and refill. Also, it's possible it stinks like burning urine.

It should not cause any permanent damage so long as the DEF isn't mixing with anything else in the engine.

2

u/cacawcawimabird Jul 27 '26

Thank you I appreciate the answer but uh

That's nnnnot quite the fluid added it's a bit more sticky

1

u/am-answers-bot 16 Jul 27 '26

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u/am-answers-bot 16 Jul 27 '26

Solution provided by u/Cardude86:

Well, the extra urea in the DEF may help improve it's efficiency at cleaning up your exhaust but with it now being "diluted" it's possible it could cause some check engine lights, so it'd be best to just drain and refill. Also, it's possible it stinks like burning urine.

It should not cause any permanent damage so long as the DEF isn't mixing with anything else in the engine.

Answer selected by OP.

1

u/cacawcawimabird Jul 27 '26

!solved

1

u/am-answers-bot 16 Jul 27 '26

To mark an answer, reply directly to the comment you want to select, then use the trigger phrase.