02 F350 coolant overflowing after injector cups replaced

[Johnnystaff]

Hello everyone, I'm a new member first post.

So one day I got home from a trip and noticed coolant spilling on the floor after checking the reservoir I saw some diesel in the coolant, I did some research and found that's due a leaking injector cup or two. So I went to the local parts store and got a new set of injector cups and replaced them all. When I pulled the first injector cup the coolant was still pressurized and some leaked into the cylinder. I pulled the glow pack cranked the motor a few times to clear it out and the rest of the job went smoothly. So now I have a new problem.

When I start the truck the coolant is instantly over pressurizing and blowing out the reservoir and will overheat if it stays on, if I pull off the purge hose (I think that's what is called) from the res. bottle the coolant goes down and so does the temperature but so does a steady stream of exhaust out the hose. I don't know what happened? Could it be a cup didn't seat right? Or the oil cooler happen to fail at the same time? I don't think the head gasket could have magically just blown. I never had any over heating problems before, also there isn't any oil in the coolant nor coolant I the oil. I'm totally confused???? Could anyone help?!?

[Johnnystaff]

any ideas would help guys, I'm at a total loss right now

[rockhoundweaz]

My guess would be a cup didn't seat right.Maybe twisted a lil in the head?Did you seal the cups well?

[Johnnystaff]

I pulled the valves off and took a look at them that seem ok. when I put them in I put locktite on the top and bottom. you think of that weren't sealed or would cause just exhaust in the coolant?

[machinestheman]

theirs a very good possibility that a cup didnot seal right my suggeestion would be to pullall your glow plugs and look at them theirs a possibility that its sucking coolant in aswell it will resemble a steam cleaned look just compare them should get you in the right direction rather than pulling them all again let us know what you find

[Johnnystaff]

ok i took a better look at the injector cups and pressured up the coolant, and it all started flowing out from them...looks like they didnt seat right the first time. so I'm going to get a new set of cups and try the job again. do you have any tips to get them in properly so I don't have this problem again??

[Rishsd]

Use a wire brush on a drill to CLEAN the seat points in the head.