Join Date: Sep 2011
Location: Breslau, Ontario
Older post, but I am new to this site and have some thoughts. The EGR system injects hot exhaust gas into the combustion chamber to help with NOX emissions. Here in Ontario they do not even check for NOX. A EGR delete will light the CEL light on the 06-07 trucks. The amount of smoke will be reduced with the delete.
I have to disagree with some of the earlier information. My understanding, the oil cooler plugs from the old factory gold coolant. This over heats the EGR cooler melting it down. The coolant leaks into the exhaust and shows as white smoke. Overheated coolant from the bad EGR cooler along with too few head bolts is what blows the headgaskets.
Even a brand new EGR cooler can go bad from a plugged oil cooler. Even with a new oil cooler the dirty contaminated cooling system can plug up the new oil cooler causing the EGR cooler to go bad. If you were compressing liquid you would have a bent rod. I check my EOT and ECT with my Scangauge II. Fantastic little gauge! If the temps very over 15 degrees the wrench light will come on and time for a oil cooler
Install a coolant filter and get ready to be surprised with whats in the cooling system. Hope this helps.
2005 F250 SCSB 4x4
-ARP studs, PowerMax turbo, Custom tuned SCT, Accufab intake elbow, Coolant filter, Oil bypass filter, Autometers and Scangauge, Zoodad + fast idle mods, Gogo direct solenoid, 4" turbo back MagnaFlow duals,2.5 levelling kit, Air bag helpers, Cowl hood, 7.5` Arctic plow