looks like blow by but tech says its steam

[Waterloo]

LOL! Sorry for laughing, but they got you good with the EGR Cooler... They whacked me $2500 for mine, the real problem was a $10 hose clamp... And I have to ask, what did you get for $7,000? If just the cooler, that is beyond theft, that is into the two foot long double headed pink dildo territory. And trust me, that $2500 of mine was just the beginning of my pink dildo experiences...

I am assuming you have a Cummins, if so, which one? Year?

Did they check your air compressor? Did they pressure test the coolant system to actually find where it could be leaking? Did they do a combustion gas leak test with the dye as per the Cummins manual? And does it have a delete, if so, who did it?