Diesel in Antifreeze

[Jesse.James]

My fiances dad has a 2005 6.0 i have mentioned a couple times before. Well the other day he pulled into the shed and i saw antifreeze all down the frame and inside the engine bay. The gasket in the cap on the resevior appears to be bad and coming off but the odd thing is the antifreeze has diesel in it. He flushed the antifreeze out and put new in and the next day you could smell antifreeze. The truck has 75K miles and he has an appointment at the dealership for next week, they said it was maybe an oring on an injector? What do you think

[cammedzx9]

that is a cracked head where the fuel passes through the cylinder head, it will need a new cylinder head, if the diesel was in the oil it would be a injector

[ajpu1983]

I would say injector cups/sleeves.

[m-chan68]

Originally Posted by cammedzx9

that is a cracked head where the fuel passes through the cylinder head, it will need a new cylinder head, if the diesel was in the oil it would be a injector

I AGREE 100%

In order for diesel fuel to contaminate the cooling system on a 6.0L, fuel would have to leak past not only the injector sleeve, but also the lower o-ring on top of that too, before it even makes it to the sleeve in the first place. That said, the likelihood for failure of both those components are slim to none, making the probability of an internal crack inside the cylinder head(s) to be quite high.

[Jesse.James]

thanks guys, i will let you know what they find next week