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Lil-Koda
Dodge Dakota
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9/30/2004
18:24:48
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 Subject: Overheating
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Message:
I have a 200 Quad Dakota with a 5.9L. Just recently had to replace the damn freeze plugs. And now the damn truck overheats everytime I put a load on it of go off roading. Fluid is a 50/50 mixture, and everything seems fine. A friend of mine had a Durango with same motor and said once his overheated one time it never stopped. Any ideas or other people withthe same problem??
2000 Dakota QC
5.9 L
Flowmaster
K&N Intake
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DSW
Dodge Dakota
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9/30/2004
20:11:10
|  RE: Overheating
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Message:
Fan clutch, I replaced it twice on my 00 4.7 with 138K miles, the OEM clutch went out at about 80K, truck was overheating in high temps 110+. The last one was on 1 1/2 years and "seemed" fine but the truck was overheating while towing, I had the lifetime warranty from Autozone and decided to swap it. Replacing the fan clutch resolved the overheating problem both times.
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Lil-kota
Dodge Dakota
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9/30/2004
20:24:49
|  RE: Overheating
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Message:
Cost for new fan clutch. The fan does seem to be spinning kind slow at an idle...heard about cracked heads and blown head gaskets but have no smoke ot fluid lose right now. Wondering if sometin else got cooked or damaged we I overheated from the freeze plug failure..Which brign up another thing who the hell use galvanized plugs, got 5 letters for dodge B.R.A.S.S. or the work D.I.K.H.E.D. works tooo...
Anyways tring to figure this out. Passenger rear window lock making noise like a dying cat, and rear window not working too, probably a wrie short or soem thin.. Any advice on the over heating?? Fan Clutch or what???
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shank
GenIII
10/01/2004
02:12:51
|  RE: Overheating
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Message:
my Bro-in-Law's 98 Ram kept overheating, replaced the Clutch (Pain in arse) water pump & thermostat. still overheated.
Replaced radiator & prob solved. It all looked good down the hole but once we broke the ends off there was a ton of corrosion & gunk built up in the water channels.
Had same prob w/my '96 Jeep. Radiator replaced 1st this time & prob solved.
Good Luck
Shank
Next time a Honduh wants to race
Ask him how many sheets of plywood he can haul?
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DSW
Dodge Dakota
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10/01/2004
14:39:56
| RE: Overheating
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Message:
1st thing in the morning drive the truck around the block to get the fan clutch freewheeling, turn off the truck and spin the fan, it should spin pretty easy. Now drive the truck and get it hot (200+) to where the fan clutch should be fully engaged, turn off the truck and spin the fan, it should be pretty hard to turn the fan, but will still turn to some degree. If the truck is hot and the fan is freewheeling, not grabbing, the fan clutch is bad. Even if there is some change in resistance to spin from hot to cold the fan clutch could still be bad as it might not be engaging completely. A tell tale sign of problems is silicone oil leakage from the back side of the fan clutch around the shaft and back plate.
Fan clutch from the stealer $100+, $50+ aftermarket. I got mine from Autozone for $50 and have already used the lifetime warranty $$ Cha Chig!
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Try this
Dodge Dakota
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10/01/2004
16:15:25
| RE: Overheating
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Message:
Another trick for the fan clutch check is to get the truck to operating temp; Turn off engine; Use a pipe to hold the fan from spinning; Start the truck; raise the engine RPM to 2K while holding the fan still; Continue the 2K idle for about a minute; Release the fan;
The fan should begin to spin then ROAR to lock-up.
If the fan simply spins without locking up then you have a defective fan clutch.
Please use extreme caution when trying the above trick. I assume no responsibility for damage... to your person or property when trying this ;)
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Lil-kota
Dodge Dakota
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10/01/2004
16:43:34
|  RE: Overheating
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Message:
Thanks for the idea, i'll give it a try...at least DSW's idea. The other sounds kinda dangerous and like it could damage a clutch that was not damaged to start with...why would I want to LOCKUP the fan??? Any other idea on what it can be though, I kinda dought it the clutch cause it run a great temp like 190 when at low speeds, only when off roading ( uphill) or with a trailer does it overheat.....
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Try this
Dodge Dakota
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10/01/2004
17:11:58
| RE: Overheating
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Message:
Uhhh... you'd want to lock up the fan to see if it can lock up... When the temp gets hot, the fan is supposed to lock up. If it just spins slowly (relative to the engine speed) then you'll over heat.
I've used my method hundreds of times on fan clutches (it was the perscibed way to check them).
BTW... I'm an ASE certified Master Tech.
You're right though; it can be dangerous which is why I listed the disclaimer and caution ;) It will definately tell you whether you've got a bad fan though.
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Ok...whatever
Dodge Dakota
JOIN HERE
10/01/2004
17:42:43
| RE: Overheating
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Message:
I swear...everyone on hear is a mechanic, or ASE certified Master Tech, or used to design exhaust for trucks, or used to build transmissions/engines for dodge, or blah blah blah! Give me a break. I just have a hard time believing eveyone's claims. I could say I was all those things, and dish out a bunch of bad advice to people, but they would believe it just because I said I was an "ASE certified Master Tech".
Whatever...
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gen1dak
Dodge Dakota
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10/01/2004
19:43:56
| RE: Overheating
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Message:
The fan clutch is a thermally activated viscous-drive. It does not lock up. If it's shot, you should be able to easily spin the fan by hand with the engine off. Flick it, and it'll freewheel. If the viscous drive is good, you will be able to spin it, but there will be a fair resistance, and motion will stop almost immediately after you pull your hand away. Do not run the engine and hold the fan with a pipe. This is absolutely stupid. Also, it's a good idea to replace the thermostat after an overheat because this can alter the functional temp range, and may cause the thermostat to open earlier, or later than it should. Another possibility, and I hope it isn't the cause.... the tranny could be sending a message....if it's an automatic. The tranny fluid may be saturating the radiator with excess heat if the tranny is heading towards failure.
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Science Guy
Dodge Dakota
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10/02/2004
12:56:02
| RE: Overheating
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Message:
Try this posted ---> Another trick for the fan clutch check is to get the truck to operating temp; Turn off engine; Use a pipe to hold the fan from spinning; Start the truck; raise the engine RPM to 2K while holding the fan still; Continue the 2K idle for about a minute; Release the fan
My response ---> This is how people get hurt. That is the most idiotic suggestion to diagnose a fan clutch I've heard yet!
No, I'm not a mechanic. Just a scientist with common sense.
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He is right
Dodge Dakota
JOIN HERE
10/02/2004
17:37:48
| RE: Overheating
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Message:
You can call it stupid or whatever you like. I was a design engineer for Mazda for over 20 years (cooling systems in particular). The description of holding the fan while warming the engine is exactly how we tested them. Believe me when I tell you that a good fan will appear to lock up with the roar he describes. A poorly working fan will slowly get up to speed. Even bad fans will show viscous resistance when you spin them, so that test will not show a bad fan.
I also would not recommend that "shade tree" mechanics try this as (in my opinion) the risk would be high for injury.
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gen1dak
Dodge Dakota
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10/02/2004
18:48:39
| RE: Overheating
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Message:
Funny, in that none of us would be shadetree mechanics, would we? So basically, you're posting this to see your words in type?
So do they test ignition systems at Mazda by holding a sparkplug wire in their hand while cranking the engine? Notice I didn't say "hands" because if it's the fan tester guy, he would only have one hand.
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JIM
Dodge Dakota
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3/24/2011
23:01:19
| RE: Overheating
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Message:
does the fan clutch affect the flow of antifreeze through the engine? My 2000 dodge durango 5.9l is overheating raplaced thermastat, water pump, filler neck,bypassed the heater core and changed the cooling temp sensor i am all out of ideas.
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02dak4.7
Dodge Dakota
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3/25/2011
12:00:46
| RE: Overheating
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Message:
No, but it does affect the cooling of the engine. On your truck the fan clutch is what engages the fan, so if you clutch is bad it will overheat.
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Korey
Dodge Dakota
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4/24/2017
18:13:30
| RE: Overheating
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Message:
You need to replace your coolant sensor.once the engine over
heats one time that sensor goes bad and will continue to
cause problems for your engine. Auto zone sells them for 23$
a piece with a lifetime warranty. 20$ for a 1 year warrenty.
I have a 2002 Dakota that I wrecked. The front end was
obliterated. I had to replace both radiators, battery, water
pump, thermostat, front end frame and I'm waiting on the order
for my fan clutch blades. I have the clutch sitting next to me in
my truck. Just wanted to see about other issues might be
happening to mine and I stumbled over this thread. Once I put
my fan and clutch on my water pump I am replacing that
coolant sensor. There are little wires that get fried once the
engine over heats and it destroys the sensor. Look into that
sensor and if not the problem then it's just 20 bucks you put
into your truck.
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