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I have a 2003 F250 7.3L that i am doing an injector replacement on (upgrading, no issues with current ones). The truck has 145K miles on it and my issue is if i should replace the injector cups or not.
I pulled the old injectors and put 20 PSI to the cooling system for 2 days, no signs of any coolant in the cups - so assuming they are not cracked.
The Coolant reservoir however has a distinctive rust color in it and what I read online that indicates diesel fluid is getting into the coolant (see picture of side of tank -top right). No white smoke except when starting after it has been sitting for a week or so (I only use it for towing, so not often).
Is there another way to test the cups to make sure they are good? I don't really smell any diesel in the coolant tank but then again, my 'smeller" is broken, lol
I have a 2003 F250 7.3L that i am doing an injector replacement on (upgrading, no issues with current ones). The truck has 145K miles on it and my issue is if i should replace the injector cups or not.
I pulled the old injectors and put 20 PSI to the cooling system for 2 days, no signs of any coolant in the cups - so assuming they are not cracked.
The Coolant reservoir however has a distinctive rust color in it and what I read online that indicates diesel fluid is getting into the coolant (see picture of side of tank -top right). No white smoke except when starting after it has been sitting for a week or so (I only use it for towing, so not often).
Is there another way to test the cups to make sure they are good? I don't really smell any diesel in the coolant tank but then again, my 'smeller" is broken, lol
Thanks for the input!
id just run it. Youll know youre getting diesel. By the smell and look. Rust is rust. Probably radiator issue. But diesel is unmistakable. As someone whose done cups, dont just pull them for fun!
If you pressurized it and nothing leaked down, ur fine. I wouldn't touch them. I pressurized my truck at 293k miles and had no leaks. Installed the new injectors and have 360k miles on it now without a problem. Fixing to do the same thing on a truck with 333k miles. I'm sure one day I will have to do cups. I'm not messing with it until I absolutely have to do it.
For me, if none are leaking, none get changed. If any are leaking, all of them get changed. If the engine is coming out or the cab is going up in the air, they may get changed just because it's far easier that way.
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