Being a shade tree mechanic since about 1959 I know there are few things more troublesome than snapping off a bolt. I'm finding many posts on various sites by people who have snapped one or both bolts on the exhaust manifold side of the EGR crossover pipe. So, why mess with them? Why can't I just insert a block off between the other end of the crossover pipe and the EGR? Does that EGT sensor have to be reconnected, what does it do?. If it is just to give me a temperature reading I can weld a bung in the DPF replacement pipe and use one of those sensors. The other cross over pipe can be removed or it could also be blocked where it connects to the EGR. Tell me why I'm wrong or better yet tell me if anyone makes a kit to do that, Thanks

 

No responses Stanley. Did you happen to find any information on this outside of this forum. Im curious as well.

 

Sorry no. I guess 6.7 guys mostly hire someone to do their mods. Im gonna PM a guy I think will know. If I learn anything Ill post it.

 

If I understand your question you would need 4 block off plates and because the cross over pipes are fixed lengths I'm not sure you could do that.
Removing the crossover pipes was not that hard for me but I soaked the bottom two bolts for a week before trying to remove.

 

You could cut the cross over pipes in half in-situ, slide in a steel plate and weld it back up. I had no problem getting my bolts out though. You don't HAVE to have that EGT sensor connected.

 

the X4 programmer Has the option to purchase their EGT probe

 

I only removed the one pipe and installed blanks, disconnected electrical connectors on egr. The blank for manifold is where egt probe is mounted, depending on tuning it can be used to trigger defuel if it gets too hot. I spent some time monitoring temps like on previous 7.3, and after this I stuffed in closet and don’t worry about it. Running Tyrant tow tune only.

 

So you removed the EXHAUST MANIFOLD TO EGR COOLER pipe only. It seems to me that would do the job as no soot would go from the exhaust in to the EGR cooler. The only remaining potential problem would be a coolant leak in the EGR cooler or the EGR valve. I don't read where that is a common point of failure on the 6.7. The other block off plates are just cosmetic, I think. You did remove the problem bolts which are the two in the exhaust manifold. Were they any problem?

 

That is correct, I expect to have to return to compliance either prior to sell or as ever changing emissions demand. For the two bolts, mine were very easy, removed with only 4000 on the odometer. I do think a penetrating lube soak and mixed warm up would make these easy.

 

We only removed the one manifold pipe as well. . If you cut off the source from manifold no gasses will be going through the other one. At least thats what logic tells me. I believe its just cosmetic removing the other pipe and if we are leaving egr on to make it easier to go back to stock why take that pipe off when it will need to go back on.
also changed out the plastic intercooler pipes. Common failure point when you least need it. Put mbrp exhaust from down pipe back. S &B cold air untake. Used tyrant tunes on scs x4 tuner. Its a beast.

Stanley,its worth it in the end, But theres really no way to know how tough those bolts will be. My greatest fear was snapping them. 300k mileage or 28k mileage doesnt matter.I had a local shop remove the bolts because he works exclusively on 6.7s and deleting. But he said they were some of the worst he has seen coming out yet. He said some ford dealers in the area had pulled bolts on the manifold pipes and put antiseize on them trying to prevent future problems for them selves under warranty work. True? Idk..... but my truck came from out of state. But maybe some dealers do do this. They know the egr will plug up and maybe they take 5 minutes to remove bolts when new to help themselves later. Im sure thats not common but could explain why some guys have absolutely no problems removing their bolts. Mine are now covered in anti-seize

 

So can you just block off the opposite side of the pipe? I think it would be much easier than fighting those bolts off of there.

 

I dont see why not but I wanted to monitor egt at manifold and put a sensor at that plate. I dont know how you can slide a block off plate on one end though,it would be very tight. Maybe it can be done.

 

Well I’m guessing you would still remove the EGR cooler and everything else like a normal delete. Just not that crossover pipe. Leave it because of the potential of the bolt breaking.

 

Ok if your removing the whole cooler then yes i suppose you could. But Im not certain but I think its going to be very hard removing the cooler with that manifold pipe left in place. Theres not much room in there to pull out that cooler. “Normal delete” isnt necessarily removing cooler. Most guys keep it in place. Some do remove them. I left mine in place. Much easier to go back to stock if emissions law change. Hopefully the valve doesnt freeze in cooler sitting in engine bay. But taking it off you risk same issue unless its kept in a vacuum environment. Much more labor intensive to remove the cooler especially if you havent done it before. But breaking bolts is too.

 

if you had a plate same thickness as gasket, likely you could slide it in, I don't know what thickness or gauge would be needed to hold back the drive pressure seen. I think in the end though if you did get a plate in there, if/when you revert back to stock, you'd still need to pull the pipe to clean out soot build up as to not immediately plug the egr.