Compression Ignition Addict
Join Date: Mar 2008
Location: Santa Rosa, CA
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Yes, you still need to upgrade because even with the EGR valve closed, hot exhaust still gets to the EGR cooler which can overheat and crack it.
Also if your oil cooler gets plugged up, then not enough coolant will circulate through the EGR cooler also making it very succeptable to cracking!
The factory EGR cooler is very thin and weak, so as long as it is still hooked up on your truck it is the "Weak Link" in your engine!!!
2005 F-250 CC/SB 4x4 medium wedgewood blue
5" lift, 5" Donahoe rear springs, 35x13.50 Extreme A/T's, 18x10 Ultra Predator wheels, 4.30 gears, Banks 4" exhaust, Airraid intake, SCT from Innovative, ARP headstuds, Bulletproof ficm, Scangauge II, Randy Ellis Design lightbar, Street Scene flares, Harpoon mod, Zoodad mod, LED 2010 taillights, dual color LED front turn signals, Pioneer avic-D3 with ipod and backup cams
Last edited by GregsSD; 10-06-2012 at 12:08 AM.