Diesel Fuel in Coolant - Ford Powerstroke Diesel Forum
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Old 10-12-2007, 09:24 AM
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Diesel Fuel in Coolant

Hi;

I have a 2001 ford tow truck with a 7.3 motor. I filled up yesterday and today I have diesel fuel in my coolant over flow resorvoir. I dont have any diesel in my engine oil or transmission, just my coolant system. Any idea what could be causing this?

Thanks
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Old 10-12-2007, 09:55 AM
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I am having the same problem right now. From what I understand you have a cracked injector cup, a brass part the injector sits in. My trucks been in the shop a week. You need a special tool to fix it with out pulling the heads.

Good Luck!
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Old 10-27-2007, 05:16 PM
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2nd time fuel in coolant

I found my coolant had fuel in it about 2 months ago. I took it to the dealer and they replaced all the cups/caps on the left head ( they pressure tested and said there was a leak on that side ). everything went and felt good for the last two months, I thought I was loosing some power the last couple of weeks, when I looked under the hood today I found there was more fuel getting into the coolant. Now I have to consider another 3k$ to replace the caps/cups on the other side, or replace the entire engine!!!!(OUCH).
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Old 10-27-2007, 06:11 PM
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Cracked cups is what causes this.. If you are inclined, you can purchase the special tool from OTC.
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Old 10-28-2007, 07:58 AM
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Most likely an injector cup issue. And you don't need to buy an OTC tool. You can use an over sized bolt that will screw in to this and carefully pull it out with a pulley puller. Re-installation is extremely important that you put the seals in the correct spots on the external parts of the cup otherwise you'll have the same issues. This task isn't something I'd recommend for someone that's somewhat mechanically challenged. I wouldn't take it to the dealership, but I would definitely find someone in your area who's familiar with the motor to help you out. Like someone from this board or another forum.
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Old 10-28-2007, 09:00 AM
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well i just finished replacing all eight cups on my early 99. 2,4 were leaking put i did not want this to happen again so i took the time to replace them all. i made my own puller set out of stuff in my shop. go buy a 1 1/4 x 14 tap. the one i bought was 47 bucks. then went to a bolt store and bought the bolt that matched the pitch. i paied 5 bucks for the bolt. i then cut the head off of the bolt to shorten it because you do not have much room on the back two holes and the one next to the heater box. one top of the bolt i welded a long nut not sure what you call it but it is a nut that is 3/4 inch long to thread into. my slide hammer i made out of some left over 1/2 rod that i welded a washer on one end and then started sleeving tube that i had laying around and then welded a bolt to the end that would thread into the nut on the bolt. total lenght is around 7-8 inches and weighed 2lbs. this little set cost 52 bucks and worked like a dream. after got a feel for the first one i was moving along. you will get a feel for it after one or two. this is not that hard of a deal. it took me a day to do all eight and get the truck going. so you know i am a self tought rench and fabracator. so jump in and do it. few little tips...stuff a small pice of rag in the bottom of the cup to keep shaving out of the piston, use some cutting fluid. even though they are brass the sleeves are tougher than you think.
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Old 12-14-2007, 10:39 PM
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Thanks eaton. Good tips.
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Old 07-08-2009, 05:40 PM
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I also have a 2002 7.3 with diesel in the coolant. I have been told it has cups by one mechanic and does not have cups by another. Can anyone tell me for sure if the 2002 7.3 has cups?
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Old 07-08-2009, 09:37 PM
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Yes it does.
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Old 07-09-2009, 07:45 AM
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Does anyone have any pictures of the cups? or how they are in the motor? I dont think I have ever seen them before.
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