fuel and radiator

[Robert11]

I've got fuel pouring out of my radiator while truck is running, does anyone know what the likely cause would be and any possible suggestions on fixing it. thanks

[mschn99]

Originally Posted by Robert11

I've got fuel pouring out of my radiator while truck is running, does anyone know what the likely cause would be and any possible suggestions on fixing it. thanks

the only way for fuel to get into the coolant is an injector sleeve (sometimes called a cup) leaking. All eight injectors will need to be removed and then the cooling system pressurized to see which sleeve is leaking....

[straycat]

That's a new one on me, I've never heard of that before. Keep us posted on this if you don't mind, I am interested in the outcome of this one.

Gord.

[Robert11]

Originally Posted by straycat

That's a new one on me, I've never heard of that before. Keep us posted on this if you don't mind, I am interested in the outcome of this one.

Gord.

No problem.

[Robert11]

Now for the hard question: where can I buy injector sleeves? Do I need to go to the stealership?

[straycat]

You could check with some of the vendors, but I don't know, it may be a dealer only item. Good luck with it.

Gord.

[straycat]

You might want to try IHC, they would probably be a bit better priced there.

Gord.

[Robert11]

I am looking at a drawing of the fuel system for the 7.3, but I do not see any part marked injector sleeve. On the injector there are a bunch of o-rings could it be those have failed?

[motopatzo]

Reminds me of a similar problem I had working on a power stroked school bus. I had fuel sitting on top of the coolant in the over-flow tank. The fix was to remove all the injectors, removed all the sleeves, replaced the sleeves and replaced all the injector o-rings. I had to borrow the "special tool" from International. It is a threader that cuts threads into the sleeve, then you install a special adapter and use the slide hammer to tap it out. Of- course in a school bus (Van body), there wasn't and clearance to use a slide hammer. If I recall correctly, I had to build a tool of some sort that bolted on the head, and used it as a bracket to pull from....I still have it somewhere.............

[mschn99]

Originally Posted by motopatzo

Reminds me of a similar problem I had working on a power stroked school bus. I had fuel sitting on top of the coolant in the over-flow tank. The fix was to remove all the injectors, removed all the sleeves, replaced the sleeves and replaced all the injector o-rings. I had to borrow the "special tool" from International. It is a threader that cuts threads into the sleeve, then you install a special adapter and use the slide hammer to tap it out. Of- course in a school bus (Van body), there wasn't and clearance to use a slide hammer. If I recall correctly, I had to build a tool of some sort that bolted on the head, and used it as a bracket to pull from....I still have it somewhere.............

That is completely correct....and if you dont build one of those "bolt up" type pullers, you cant use a slide hammer on the back two cylenders on each head...you have to remove the motor, head, or cab to do it without a bolt up puller type system...

To elaborate on the question above...the injector sleeve is a brass cup that is basically press fit and locktited into the head. It is what the lower o rings for the injector and the actual copper washer by the nozzle seal to....sorry for not getting back to you sooner on this one...