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Old 03-13-2017, 02:24 PM   #15
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It's normal ... wipe it off with paper towels so it doesn't get into the reservoir. It's just overflow from the last time it was filled.
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Old 03-13-2017, 02:41 PM   #16
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On my pickups with DEF tanks, they were always heated tanks to keep the urea in a liquid state, would it be terrible if some crystals fell into the tank ? wouldn't they go into suspension with the rest of it?
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Old 06-21-2017, 09:55 AM   #17
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Originally Posted by PropFan View Post
Is this level of accumulation around the filler cap normal? Should I just flush this away with water?

Your overfilling it
Rinse off with water
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Old 06-21-2017, 09:22 PM   #18
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Actually, it looked like this when I bought it. Since cleaned up. See my 3/5 post.
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Old 06-22-2017, 10:31 AM   #19
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I found the same residue when I picked mine up. I used the hose to rinse the crystals off and found that the cap wasn't really tight. Wash it off, top off the DEF, and screw down the cap so it is tight.

Someone asked the question whether or not the crystals would redissolve if they fall into the tank. The answer is Yes, because DEF is not a saturated solution and any crystals that fall in will redissolve.
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