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  #1  
Old 10-23-2010, 10:26 AM
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Fuel In Coolant.

Got home the other day and found fuel in my coolant. So I'm going to be doin the injector cups next weekend. I've heard several different opinions on wether or not to replace injectors when doing the injector cups. what do you all think? If I do the injectors I'm thinking of doing the beans stage 2's and getting there custom tunes. I'm just wondering if I should plan on doing the injectors or can I get away with only doing the cups??? Thanks for the help.
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Old 10-24-2010, 12:21 PM
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At the very least I would put new o rings on the injectors while you have them out. Although having them rebuilt, or a new set would be an even better idea.
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Old 10-24-2010, 12:26 PM
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you do not have to do anything to the injectors if they are working fine. just make sure you put NEW injector rings on before putting them back in.
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Old 10-24-2010, 12:41 PM
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Do not use cheap chinese napa o rings either. Unless you feel like pulling them again soon.
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Old 10-24-2010, 12:43 PM
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lol austin, had experience from that?

i only recommend rings from ford or alliant(injector mfg)
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Old 10-24-2010, 12:47 PM
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The only time I've done injector cups was while changing all the injectors. Shop figured we might as well change em if we were doing the injectors. Not sure if it works the other way around. I wouldn't think so though. You could always just send the injector to your local diesel shop to get tested.
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Old 10-26-2010, 07:52 AM
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You are already going to have them out, so yes now is the time to do them. If not, you MUST use new ALLIANT O rings.

PPPLLLEEAAASSEEEE Do yourself a favor and get the injector cup brush and make sure you have a long skinny screw driver. You HAAAVEEE to get all of the old locktite out... otherwise it won't seal. Throw a little brakekleen in there and then blow it out real good afterwards. The new locktite won't set on a wet surface.

Also since one is leaking you can do them all or just the side that is leaking.

You can pressurize the head and see the leak usually once the injectors are out.
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Old 10-26-2010, 03:43 PM
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When I was in the Army, I was working with a 1088 bobtail. The thing was overheating, and it was dripping diesel from what APPEARED to be the coolant overflow tube, dispensing on the ground underneath the truck. I was like wtf.. so I got a mechanic. He was stumped why the truck was overheating. For the hell of it, I pulled the coolant flow cap, which is about 2ft above the fuel fill cap. It smelled like pure diesel. The mechanics said I was crazy, there is no way diesel fuel got into the coolant reservoir.

Long story short, those dumba$$es finally listened to me and drained all the coolant.. "coolant".. which consisted of 90% diesel fuel. They had to rebuild the whole motor.

Army mechanics= not happy.


I'd love to know what dumba$$ put diesel in there.. I still dont know :think:
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Old 10-26-2010, 04:24 PM
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Are you saying someone put diesel in the coolant tank instead of coolant? That's as dumb as it gets.I've known people to put antifreeze in their windshield washer because they both have the word a anti-freeze in them. Up here in Canada we use windshield washer antifreeze in the winter.
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Old 10-26-2010, 05:48 PM
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Yes.. somebody, wether it was a prank or they really were a complete dumba$$, put diesel in the coolant fillup. Granted, they do kinda look similar on our army trucks.. except one is over your head, and the other is dick-level and has a 55gallon tank attached to it...
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