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Main concern of the Powestroke mechanic at the Ford dealer was the crystallization of the urea plugging the fuel lines, pump and injectors. I'm covered by my insurance so I'm letting the dealer and insurance company handle it.
If it didn't get far enough into the system to hit the WIF sensor, which is in the primary filter housing under the cab, it didn't get to the pump or injectors, but I guess that's their call.
I don't understand why Ford didn't ; 1) Give the separator bowl a 12 oz. capacity. 2) Use a lock-off style filter that completely stops the fuel flow after a predetermined amount of water amasses in the separator chamber. We've had these on aviation fuel tanks for decades.
Dilution rate has nothing to do with it. Def is a water based product and will not mix with the fuel. After more than about the first 3-4 ounces fills the water separator, the rest will pass through to the high pressure fuel pump causing it to lock up. Then the cam breaks and the pistons hit the valves. Thirteen ounces is a fatal dose if the truck runs long enough to suck it up from the bottom of the tank, which is where it will be sitting due to its density. Fortunately if the Water in Fuel (WIF) light hasn't come on, it hasn't got there yet. Drain/dry the tank and re-install it. For the next couple weeks drain the water separator every few days, or IMMEDIATELY if the light comes on. Don't attempt to drive it home first. Pull to the side of the road and open the yellow drain valve and let about 6 oz. out.
To the O.P.- You ducked the bullet on this one, but if it ever happens again, DO NOT START THE ENGINE. I don't care how many people are honking at you. A new 6.7 plus labor puts a big dent in 20 grand.
True statement, the DEF will just roll around in a 1/10 gallon "bubble" or possibly a bunch of smaller bubbles at the bottom of the tank. Not sure how far off the bottom of the tank the suction sits but absolutely good advice above.
Thanks to the OP for the healthy reminder. It's good to see posts like this once in awhile.
I have done similar. Traveling outside home base once I grabbed the green fuel nozzle like I had done hundreds of times before and got 5 gallons in before realizing diesel at that station was yellow handled.
Called my son whom I was visiting (his college days) and had him bring 5 5gal. containers and some nalgene tubing. Pumped out all I could, refilled with the real thing and was on my way. Used the contaminated fuel as accelerant for huge stump and brush burns we do every year.
I don't talk to anyone, answer phone, allow help......nothing while starting the fuel nozzle, adding DEF!!!! However important it may be, it can wait. When fueling, I always check to make sure I have the slimy nozzle, press the "DIESEL" button and generally do a "sniff test" of the nozzle before inserting into the fill spout.
Don't just look for the "green" nozzle!! Some stations put green nozzles on gas pumps!!!
Dealer took a sample of the fuel today and there is definitely water droplets in the fuel. The plan is to drain and clean the fuel tank and to flush the fuel lines between the tank and the engine mounted fuel filter and replace the filters and add a fuel additive. As of now looking around $800-900 per the estimate. Insurance company will give me a letter guaranteeing coverage in case of any other problems with the fuel system and engine. Ford recommends a total of change out the the fuel lines, injectors and fuel pump for the cost of $13,000 plus.
I would have been hesitant about just flushing the lines and cleaning of the tank if the amount of DEF was more than 1/10 of a gallon.
Wow I have learned a lot about the DEF in fuel issue. I wonder why there is no lock on the fuel door. A nefarious soul with 2.5 gallons of DEF could do a whole lot of damage in a parking lot.
Wow I have learned a lot about the DEF in fuel issue. I wonder why there is no lock on the fuel door. A nefarious soul with 2.5 gallons of DEF could do a whole lot of damage in a parking lot.
Or water, or anything. Scary. You can get a locking fuel cap. I remember, I had one on my '71 Dodge Dart in the '70s.
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