Overheating and the Dealer can't Diagnose
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Joined: Sep 2007
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From: MN
Ok this a riddle that is driving me and my father crazy. He has a 07 3500 with around 70k on it. He has an edge aditude and a afe stage 3 intake on it. That is all for add-ons. He has had some bad cooling problems no one can diagnose it to date including the dealer and a second indipendant shop. 
The parts replaced so far include the water pump, thermostat, cooling fan, and all the coolant as well. 
The last time it was at the dealer they said it could be the pump or maby a head gasket but they couldnt be sure.
We replaced the pump and the temps did drop by 10 deg or so but still it heats up to 215 deg with a no load on a minor hill at 60 mph. No real loading or work. On previous test drives before the pump it would go to 225 easy on the same strech. Prior to any problems it woulnt get above 205 with a load. Also it seems to peg the boost right away. what i mean by that is just lean about 55% throttle on acceleraton from a stop and boom 37psi like 2 seconds later. We cant figure it out and no one else has given us any real help either. Any input would be greatly apreciated.
The parts replaced so far include the water pump, thermostat, cooling fan, and all the coolant as well. The last time it was at the dealer they said it could be the pump or maby a head gasket but they couldnt be sure. We replaced the pump and the temps did drop by 10 deg or so but still it heats up to 215 deg with a no load on a minor hill at 60 mph. No real loading or work. On previous test drives before the pump it would go to 225 easy on the same strech. Prior to any problems it woulnt get above 205 with a load. Also it seems to peg the boost right away. what i mean by that is just lean about 55% throttle on acceleraton from a stop and boom 37psi like 2 seconds later. We cant figure it out and no one else has given us any real help either. Any input would be greatly apreciated.I know your older, its ok.
Banned
Joined: Jan 2006
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From: McDonough GA
Check your MAP sensor and clean it with electrical contact cleaner. You should neot see boost numbers that high without other issues. I wonder of the ECU is just seeing invalid info and totally messing up the injection event trying to compensate.
Old Mopar Aficionado Extraordinaire
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From: North West Jorsey
Nice
Forgot about the MAP and the MAF. I just can't seem to get into the groove with this crap for the last 5 trucks.
Does that have a waste gate on it? I forget on the 5.9's now.
Does that have a waste gate on it? I forget on the 5.9's now.
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Joined: Jan 2006
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From: McDonough GA
The 04.5-07 5.9's all have an electronically controlled WG that should open at 30-32 psi. Unless its being fooled which I believe the juice does, but, not 40 psi right off the bat like that.
The only thing I can think of if that is true, the CAC or something else is plugged. THAT would cause high engine heat and all manner of weird boost problems.
Hmmm, I wonder if the turbo is going bad and throwing oil into the CAC. Something more to chech on for the OP.
Administrator / Free Time Specialist
Joined: Nov 2005
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From: Birmingham, Alabama
No MAF, just the map.
The 04.5-07 5.9's all have an electronically controlled WG that should open at 30-32 psi. Unless its being fooled which I believe the juice does, but, not 40 psi right off the bat like that.
The only thing I can think of if that is true, the CAC or something else is plugged. THAT would cause high engine heat and all manner of weird boost problems.
Hmmm, I wonder if the turbo is going bad and throwing oil into the CAC. Something more to chech on for the OP.
The 04.5-07 5.9's all have an electronically controlled WG that should open at 30-32 psi. Unless its being fooled which I believe the juice does, but, not 40 psi right off the bat like that.
The only thing I can think of if that is true, the CAC or something else is plugged. THAT would cause high engine heat and all manner of weird boost problems.
Hmmm, I wonder if the turbo is going bad and throwing oil into the CAC. Something more to chech on for the OP.
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Joined: Jan 2006
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From: McDonough GA
It takes fuel to make boost. That fast a rise is going to be noticeable in a power increase and quite likely some pretty good smoke on acceleration.
Back to using manual gauges for boost and EGT's like the water temp to track an electronic problem.
Back to using manual gauges for boost and EGT's like the water temp to track an electronic problem.
Registered User
Joined: Nov 2007
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From: Kuna, Idaho
What does the coolant temp do first thing in the morning? It should rise to a temp about 193-195° and drop to 186-190° as read on the E J/A. When you accelerate from there it should go up a little, but not as high as your seeing.
It should take a very full load to get to 207°, which is where the OEM thermostat opens. I have only seen temps that high 10 or so times this summer and I towed my TT about 3200 miles.
The boost thing is also interesting.. High boost and high coolant temps could be caused by wrong timing.. something that is controlled by the Edge. How do the EGT's look under normal driving. If the Edge is messing the timing up to cause the boost/coolant issues then they should be much hotter.
It should take a very full load to get to 207°, which is where the OEM thermostat opens. I have only seen temps that high 10 or so times this summer and I towed my TT about 3200 miles.
The boost thing is also interesting.. High boost and high coolant temps could be caused by wrong timing.. something that is controlled by the Edge. How do the EGT's look under normal driving. If the Edge is messing the timing up to cause the boost/coolant issues then they should be much hotter.
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From: Longview, Tx
If you are reading boost off the edge I promise you the gauge is not showing the actual boost pressures. I just don't see it being possible for full boost at the load levels you are saying, even if the waste gate was welded shut. I don't see that causing you heat problem, but I have seen stranger things.
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