losing coolant
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
losing coolant
My 06 has been getting hard to start and will buck and jerk when pulling a trailer at 65-70 going up a hill. If I just push harder on the throttle, it'll boost up, but it will buck and jerk. It'll also push boost past 30 psi. If I completely let off the throttle and hammer down, it will not do this. I was thinking that it was related to my mystery coolant loss. I do not see any puddles under the truck. I do however see coolant leaking out of the cap, but I do not think it is enough to be using a gallon a week... I could be wrong. What could be my issue here? I just sent out my FICM to ed to get repaired and the atlas 40 put on it. My average mpg has been suffering and is down to about 13 highway at 70 with cruise on, unloaded.
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Cargo Master
Joined: Oct 2008
Posts: 2,308
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From: Elyria, OH
I also have the blue spring installed and am using rotella t 5w40 oil. So I do not know if this is engine related or trans related. There are no codes in the computer. What should I do/ look for?
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
Do you have any gauges that read live data like scan gauge II? And have you had to add coolant and if so did you fill it past the min mark on the degas bottle? Have you replaced the degas cap? Does it only show signs of wetness on the degas bottle after you have been towing hard?
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Cargo Master
Joined: Oct 2008
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From: Elyria, OH
I see moisture on it after towing and after driving hard. I have replaced the cap. Hard start is when cold and it would puff black smoke and idle rough for a few seconds. I have not pulled the egr valve. The only thing I have to read live data is my OTC scan tool.
Senior User
Joined: Nov 2007
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I just got my truck bak today from the shop.they did a oil cooler and egr cooler. While they were replacing those they found that my heater hose tat had a sensor on it was leaking onto my exhaust causing me to lose a half gallon a week. I thought it was my egr cooler. You might want to check that area. I never had any puddles under my truck.
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Cargo Master
Joined: Oct 2008
Posts: 2,308
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From: Elyria, OH
I'm going to pull the valve tonight to see if it is carboned up. Sounds like it could be my issue that I've been dealing with all along
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Postmaster
Joined: Sep 2010
Posts: 3,472
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From: Southern Cal
I just got my truck bak today from the shop.they did a oil cooler and egr cooler. While they were replacing those they found that my heater hose tat had a sensor on it was leaking onto my exhaust causing me to lose a half gallon a week. I thought it was my egr cooler. You might want to check that area. I never had any puddles under my truck.
This extreme heat created, can split open the egr cooler which allows coolant directly into the intake. If not resolved early, hydrolock can occur, bent connecting rods/pushrods, etc.
Pull your egr valve and look for wetness as a sure sign.
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
This is down in the EGR housing. There is damp soot in the lower portion. Looking like a blown EGR cooler to me...
This is the valve itself. Its pretty dirty, but i have seen worse
Another shot
Well, what do you guys think?
Logistics Pro
Joined: Dec 2004
Posts: 4,138
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From: South Weber, Utah
Yepper i'd say so. Looks like you will be doing an EGR cooler and oil cooler. Lets hope the head gaskets are ok. And since you will have everything taken apart it is a most excellent time to do your STC fitting on the HPOP if it has not been done.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 243
From: Saratoga Springs,UT
You need some gauges for shure
Boost past 28psi is asking for trouble
Knowing the oil cooler condition would be a Bonus here as the Gooey Blackstuff in the EGR Valve could be from Poor Combustion in addition to coolant Loss
If the egr cooler does leak its only a Pinhole (Plus you didnt say the Magic word "White Smoke")
If I had to guess
#1with Boost Over 30 psi
#2 Coolant getting Pushed out the CAP
#3 No Mention of White Smoke (what you would have with EGR Cooler Fail)
Id say your HeadGaskets Are Gone or Really the OEM Bolts have stretched
The Sensors that control turbo need Checked and turbo May need to be Clean since your Overboosting
The thermostat needs checked or replace since its cheap and your Going Deep
The Intake manafold needs cleaned along with the IAT2--MAP--EBP sensor
Boost past 28psi is asking for trouble
Knowing the oil cooler condition would be a Bonus here as the Gooey Blackstuff in the EGR Valve could be from Poor Combustion in addition to coolant Loss
If the egr cooler does leak its only a Pinhole (Plus you didnt say the Magic word "White Smoke")
If I had to guess
#1with Boost Over 30 psi
#2 Coolant getting Pushed out the CAP
#3 No Mention of White Smoke (what you would have with EGR Cooler Fail)
Id say your HeadGaskets Are Gone or Really the OEM Bolts have stretched
The Sensors that control turbo need Checked and turbo May need to be Clean since your Overboosting
The thermostat needs checked or replace since its cheap and your Going Deep
The Intake manafold needs cleaned along with the IAT2--MAP--EBP sensor
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