what are a couple ways to diagnose a leaking EGR COOLER?

[2000excursion]

as title states please help...random white smoke seems to be getting worse. lots of smoke

[hazard]

well the best way to find a small but getting worse coolant leak is to a- check for external leaks, b- take an oil sample. i work for cummins and i replace a chit tone of egr coolers on anthing from isb to the isx engines and this seems to be a real good way to see if the egr cooler is leaking seems like we get some drivers that keep an eye on the coolant level and notice a loss soon before it gets bad enough. (not always the cooler but it at least lets you know something is leaking internally), the oil sample result will show a high percentage of potassium content in the oil. i guess this is what i am going to do on my 6.0 just because i can get oil samples done pretty easily and for about 20 bucks so i think its a good idea... hope this helps.