1999 5.9 4x4 D Not getting to Operating Temperature? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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chriscorliss
 
  1999 5.9 4x4 D Not getting to Operating Temperature? - Posted: 10-23-2007, 01:57 PM
Chris w/1999 5.9L D
Joined: Oct 2007
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City: Litchfield Park
State: AZ
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Post #1

Gentlemen,
If you could help me out I would greatly appreciate it. I read all 926 threads and learned a lot, but I am still unable to diagnose why my
1999 4x4 5.9L D of 89,000 miles will not get to operating temperature. It began doing this about 6 months ago, I replaced the thermostat with a 195, and it continues to run cold. IT WILL GET TO OPERATING TEMP with the A/C on, so I know the gauge is good, but the needle barely enters the "white brackets" on the temp gauge with the A/C off. And the engine fan turns freely when I move it. Any ideas?
I have been losing oil and coolant with no puddles on the ground. From this forum I understand I am losing oil because the intank manifold gasket is failing and losing coolant due to evaporation since I live in Arizona and the reservoir is not pressurized. Do you guys concur?
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qtipextra
 
 Posted: 10-23-2007, 02:58 PM
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Post #2

is this at idle, or will it barley warm up when you drive it around? Mine seems to take a while to warm up idling, I have to drive a little for it to warm up. But the less heat your engine has, the better. Why worry about it? I could understand it's it's not warming up to the point where it runs smooth, but if it runs smooth, why worry about it?
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chriscorliss
 
 Posted: 10-23-2007, 06:16 PM
Chris w/1999 5.9L D
Joined: Oct 2007
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City: Litchfield Park
State: AZ
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Post #3

Both. It doesn't get to Operating Temp in either Idle or after driving around unless I have the A/C on. I guess the only draw back is that I don't have any heat when I need it--it only comes out luke warm. So you are saying that there are no negative side-effects to having the engine run cold all the time?
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gramol
 
 Posted: 10-23-2007, 06:29 PM
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Post #4

for the money put another thermostat in...... test drive with scan tool to verify proper operating temp......190 to 205 ish.
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HemiDak
 
 Posted: 10-23-2007, 07:36 PM
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Post #5

Sounds like a stuck thermostat to me as well.
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bentcrank
 
 Posted: 10-24-2007, 06:48 PM
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Post #6

Chris, I currently have the same problem with my 99 5.9. surprising since you live in AZ. I live in IL so need to address this problem immediately. I have a few ideas and will let you know what i come up with. keep us posted. thanks
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bentcrank
 
  Uh OH - Posted: 10-24-2007, 07:16 PM
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Chris, I Meant i have the operating Temp problem, not the others, From what you describe you should see if under the RAD cap you see a milkshake like foam-funk goin on. sure sign of a head - manifold gasket problem. funny thing is your oil level should go up. otherwise it's dumping in a cylinder or two and being burned up. check your plugs for fouling. or get a compression test.
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