Shadow_Grey said:
Coolant will still be flowing just no exhaust flow. Unless you do like Weweld did coolant will always flow thru the cooler.
then what did weweld do?
UPDATE:
i just called elite diesel and talked to Tadd. he told me that with the up-pipe with EGR delete, that coolant would still flow thru the EGR cooler, but it runs thru an internal pipe, which has the "fins" around it.
at stock, the fins are heated by the exhaust, which in turn heats the coolant.
so now, with the up-pipe with EGR delete, only atmospheric air will be circulating around the EGR cooler.
he also said, that with the EGR valve unpluged, it will not hurt anything. he said that on most '04's like mine, that it may not even set off the CEL. it might cause a code to throw, but that wouldn't do anything.