It is not so much of an IF as a WHEN. Deleting mine this 2 week break from work for that very reason.Egr could potentially leak and dump coolant into the motor....that’s a big if
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I don't think the tune actually shuts off the EGR, it simply keeps the code from showing up. You can unplug it to keep it from operating, but I want to do the delete just to prevent future problems with it leaking coolant into my engine.
I am going to take the time to change my thermostats while I am at it, since you have to drain the coolant to delete the EGR cooler and my coolant is due for a change anyway. Again, just to solve future problems and to put my coolant back on a new basis for future maintenance.