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Wayne
Dodge Dakota
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4/01/2003
19:04:39
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 Subject: Running hot
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Message:
My 2001 Dakota is running hotter than normal. Dealer replaced fan clutch, still running hot. Thinking thermostat stuck, installed 180. Still running hot. Dealer felt 180 messed up the way fans worked, went back to 195 thermostat. Running cooler but weather became cooler. Thinking leaking head gasket, compression checked good, spark plugs ok. Weather now 85, running hot, hooked up camper, running way to hot. Pulled camper 3200 miles last summer, mountains, 100 degrees, no problem. Today, big problem. Help, anybody got any ideas?
2001 Dakota Quad 4x4 4.7 5 speed Intense Performance Z Tube, Magna Flow muffler
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Texas Todd
Dodge Dakota
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4/02/2003
14:31:31
|  RE: Running hot
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a lower temp fan messed up the function of the fans?-NOT! This dealer must not know that you don't even need the viscous fan with the electric one in most all cases. Driving, the rads getting air. Does this 4x4 have the trailer towing pack?
I think I know what's wrong, seen it posted before.
Did you bleed ALL the air out of the system?-probably not, and it runs hotter.
Check the bleeder screw, with it open and the engine running and warm so the t-stat will open and circulate the fluid.
If you've done all that correctly, then sorry, never mind.
LOL, I love these dealers and their knee jerk reactions-changing the fan clutch?
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Wayne
Dodge Dakota
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4/02/2003
15:19:15
| RE: Running hot
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Message:
Texas Todd, thanks for responding. The fan clutch was bad, excessive movement and noisy. (85000 miles already) Hence dealer determination that it was the problem. Current thinking is that the Tstat is not opening. Infared sensor says 235 degrees on bleeder nut, 140 upper right corner radiator, 105 lower left radiator. Possible exhaust air getting into the system causing Tstat not to open. (Head gasket leak, cracked head) But, compression good, no sign on plugs, no heavy exhaust vapor. Very confused. Today, 200 mile trip, ambient temp when I left 50. Ran near normal, 65 mph for 150 mile. Last 50, ambient temp 78, AC on, 75 mph on interstate. Ran hot. No trailer. Any ideas? Oh yes, running heater cools engine significantly. Probably why I didn't notice the problem this last winter.
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dweishaar
GenIII
4/02/2003
16:27:19
|  RE: Running hot
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Message:
I think he was refering to bleeding the air out of the system from the bleeder screw(hex head) on the upper hose mount on the engine.....if you get air pockets in your system, you're in for a lot of trouble(radiator will be cool, engine will be hot as hell). Also, check all of your hoses, if one is leaky and sucking air, even after you bleed the system, you'll get air pockets....good luck.
The Baja Dak
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Wayne
Dodge Dakota
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4/02/2003
17:23:25
| RE: Running hot
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OK, opened bleed screw and very small bubbles were evident immediately. As engine warmed, larger and more bubbles appeared. Never seems to end. Can't find any leaking hoses, but is it sucking air from somewhere? Or does this take longer than I'm expecting. (20 minutes so far)
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dweishaar
GenIII
4/02/2003
17:57:54
| RE: Running hot
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Message:
Sounds like a leak in the system. The bubbles should stop after the engine reaches operating temp, then just fluid should start coming out. might wanna have someone look at it.
The Baja Dak
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JS
Dodge Dakota
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4/02/2003
22:00:19
| RE: Running hot
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Message:
How do bleed air out of the system. Where exactly is this blead screw. I have a 98 5.2 with MI intake. Is this hex bleeder screw on the intake. Mine started running hot only when ambiet temp is above 90 this started happening after I almost overheated last summer. I would like to try this to see if fixes the problem.
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Texas Todd
Dodge Dakota
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4/03/2003
12:34:38
| RE: Running hot
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Message:
This bleeder screw is on the 4.7.
someone else may post on the 5.2.
Wayne, there could be that much air in there, you have to add fluid while you're doing this, to replace the air in the system, when it quits bubbling, it's good to go.
I would do as you are and make sure about a leak though. Seems like water would come out if air were leaking in?
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terry
Dodge Dakota
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10/16/2003
13:19:23
| RE: Running hot
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I know this is a few mo. old but I didn't see this when I needed it. I could not figure out what was wrong when my 4.7 kept overheating then I went to a radiator shop. they told me that if not bled of air the truck would overheat. it makes perfect sence so its free to check.
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Growl99R/T
Dodge Dakota
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10/16/2003
14:02:14
| RE: Running hot
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same thing happened in my R/T.
lemme guess, your heat blows out cold air as well?
air in the cooling system...... like already mentioned. is there a bleeder in the 5.9? i just fill it up with fluid with the cap off whie it runs..... then cap it once it's full and it has run for a minute or so.....
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gen1dak
Dodge Dakota
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10/16/2003
15:34:15
| RE: Running hot
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You've gotta be kidding me. A little air in the system and these things overheat? Jeeeezzzz, whatever happened to trucks you couldn't kill with a nuke? I have a more insidious explanation. I'm a worst case kind of guy, so either it's a not-so-bad heater control valve, or a tranny overheating issue. Ever since these overdrives came onto the scene, the reliability has gone out the window. My old 727 was like granite. The A500 in my Dak was a total piece of crap. Burned up every 15-20k, and I didn't tow anything. They work fine with aftermarket kits, but stockers still seem to suffer. A disintegrating tranny will run hot and cause a run-hot condition.
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Endless_R/T
Dodge Dakota
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2/08/2004
15:54:54
| RE: Running hot
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Message:
So is there a bleeding nut/screw for the 5.9?
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