Not necessarily blown gaskets, romping on it too hard will push the EGTs to the point of flash boiling the coolant, ESPECIALLY if you have a stock coolant cap (they are notorious for causing coolant puking). Black Onyx gaskets are absolutely JUNK, I've heard of 6.0s popping B/O gaskets with studs in place just as much as stock gaskets with TTY bolts, go ARP studs with factory Ford HGs. If you legally can, get that EGR cooler out of there ASAP, otherwise put in a BulletProof cooler. A clogged stock EGR/oil cooler can blow gaskets too
Originally Posted by Mdub707
If you don't follow on just one part of that, you will have failure again.
Also if you have the tools and knowledge (pretty basic knowledge) you can do it yourself and save about $3000