egr
Posting Guru
Joined: Nov 2012
Posts: 2,123
Likes: 5
Well ya said it yourself. The increase in the temps. Primarilly the delta or temp differential between the ECT reading and the EOT reading.
The coolant temp and oil temp difference. A delta of 15*deg. greater temp difference between coolant and oil is almost a shure of a restricted [plugging] oil cooler.
The coolant temp and oil temp difference. A delta of 15*deg. greater temp difference between coolant and oil is almost a shure of a restricted [plugging] oil cooler.
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
The EGR cooler can fail catastrophically or it can start degrading to the point it should be replaced during other work. Sometimes the first sign of failure is a massive cloud of white smoke dumping out of the truck, sometimes it's a wet EGR valve, sometimes it's the temp delta, sometimes it's a chocolate milkshake in the degas bottle, sometimes it's a hydrolocked motor. If the EGR cooler completely lets loose it's probably because of a clogged oil cooler, but if you have a wet EGR valve it could just be leaking slightly even if you currently have a good temp difference. On a used truck if the oil cooler was replaced but not the EGR cooler, the EGR cooler could easily start leaking with an acceptable temp variance of less that 15*.
Kind of depends on what the order of failure is; the oil cooler blocking coolant flow, the EGR cooler packed up with carbon build up, stuck EGR valve, etc. There's not one definitive root cause that applies to all cases, even though the oil cooler is the most common one.
Kind of depends on what the order of failure is; the oil cooler blocking coolant flow, the EGR cooler packed up with carbon build up, stuck EGR valve, etc. There's not one definitive root cause that applies to all cases, even though the oil cooler is the most common one.
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New User
Joined: Feb 2013
Posts: 12
Likes: 0
my temps has never change water level never changed today i ran the **** out of it still no changes and never smoked it seems to do it when i start it cold but goes away im leaving for daytona thrusday hauling friends and my bike down last thing i want is to brake down
Lead Driver
Joined: Mar 2010
Posts: 5,505
Likes: 256
From: Woodbridge, Ontario, CA
If the ambient temperatures are very cold where you are, it's not unusual for your truck to smoke a little white during takeoff when the engine is cold. It the symptom disappears once it's up to operating temperature, I would call it normal.
Elder User
Joined: Jan 2011
Posts: 951
Likes: 2
From: Center, Texas
My egr cooler crapped out a couple months ago with deltas of 7-9 consistently. It ruptured causing a hydrolock. I pulled it and plugged and welded the ends plus removed the scoop from the up pipe. Got her back together finally and running good. Only have put about 250 miles on it since I got her patched up but deltas are still good. Didn't change my oil cooler due to the good deltas so I hope that don't bite me later. Left valve plugged in and so far no CEL. Mines an 05.
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New User
Joined: Feb 2013
Posts: 12
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yeah its been very cold and after about 2 minutes no smoke whats so ever but to be honest i never notice or look all winter
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