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calvin40
Dodge Dakota
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12/08/2004
11:06:44

Subject: 4.7 overheating
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My 2001 Dakota QC 4x4 with the 4.7 and towing group has been overheating and losing coolant from the overflow bottle. It has 50,000 miles. The fan clutch was replaced at 38,000 miles. It seems to get hot at idle and low speeds, loses coolant, and doesn't reclaim it from the bottle. I suspect a warped head or bad head gasket?



Joe X
Dodge Dakota
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12/08/2004
14:22:14

RE: 4.7 overheating
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If it doesn't reclaim from the bottle, that's a clue that the pressure cap may be faulty.
When the engine heats up and the coolant expands, if the cap doesn't hold pressure, it just goes into the bottle. Then when the engine cools and the coolant contracts, if it's not pulling from the bottle, it's just sucking air in.
Check the cap, and make sure the hose to the bottle is not ripped or split.
Also, does the electric fan turn on when it's supposed to?




Sarcastic
Dodge Dakota
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12/08/2004
14:25:51

RE: 4.7 overheating
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If you take it to a Dodge service department, they won't be able to find what's wrong because it won't show up on their scan tool.
They don't know nothin' about machinery any more.




TexasTodd
Dodge Dakota
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12/08/2004
15:34:03

RE: 4.7 overheating
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calvin,

To add to what Mr. X said,

If it runs correctly, I doubt it's a head or head gasket.

I haven't had any fan or fan clutch on mine for 3 years now, stock 4.7 with the Trailer tow, etc., never gets hot, if it's getting hot, I doubt it's the fan clutch anyway, due to the fact that I don't even have one on my 4.7. Just the stock elec system, and a 180 t stat. It didn't get hot with the 195 either.

Good luck



rje
Dodge Dakota
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12/08/2004
21:54:25

RE: 4.7 overheating
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Replaced fan clutch, water pump,thermostat and bleed the system still overheated. Finally, Sent it to the dealer and had the radiator checked. Sure enough the radiator was over 75% clogged. Thank god for extended warranties.

Rob



HeavyHitter
Dodge Dakota
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12/09/2004
17:25:53

RE: 4.7 overheating
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Had the same problem. Couldn't detect CO in the radiator but it ended up being the head gasket. I switched over the to 5.9L radiator (1.8" vs 1" core width)replaced the head gaskets. Did some porting/valve job while I had the heads off, welded a boss for a return oil line and threw on an intercooler with a T-4. Runs strong and never get anywhere near the temp it used to before the fan clutch kicks in.



calvin
Dodge Dakota
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12/16/2004
12:01:12

RE: 4.7 overheating
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update: it is at dealer now, having heads pulled and checked. One cylinder had coolant in it. The thermostat put in this summer was bad, wouldn't open in 220 degree water, may have caused air pocket in cooling system from heat and probably warped a head.



will
Dodge Dakota
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12/15/2007
16:36:16

RE: 4.7 overheating
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I also had same problems.I have the over heating,lose of coolant on a constant bases.I`ve replaced the clutch fan,the radiator,the termostat.Thinking this problem might be also caused from the orange anti freeze,flushed system and put normal antifreeze,in.And finally we found that #3 cylendar is pressurizing cooling system. we found this by pressurizing each cylendar until we found the one.this means head gasket.



01Motorsport
Dodge Dakota
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12/16/2007
00:26:57

RE: 4.7 overheating
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Radiator caps do wear out/go bad. Replacement is a simple, cheap test in trouble shooting.



Drew
Dodge Dakota
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7/19/2008
05:10:14

RE: 4.7 overheating
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My 2000 problem is that when it's cool outside the truck doesn't even get close to overheating (200-210, but on a sunny day after about 25-35 miles the temp goes from normal (210) to about 220-250 (almost to the red). Why is this happening.



Danny Howell
Dodge Dakota
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7/23/2008
21:32:04

RE: 4.7 overheating
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I also have experienced overheating with my 2001 Dodge Dakota. As a matter of fact, it ran hot this afternoon. I replaced the top hose and it seems to have cooled it off but not completely. Now, when I am idling the truck seems to do fine but when I am in gear I have started hearing a pinging noise. The more I accelerate, the faster the pinging becomes. Does anyone have any idea what could be causing the problem or possibly what the overheating did to my motor?



Joe X
Dodge Dakota
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7/24/2008
00:32:30

RE: 4.7 overheating
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How many miles on your coolant? Over 50,000? Replace it.



adam
Dodge Dakota
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8/15/2008
12:15:57

RE: 4.7 overheating
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danny, if your hearing a pinging noise you should get it checked out right away i had a jeep cherokee that started doing that but i ignored it and ended up throwing a rod.... now it needs a new motor lol. and as for my dakota problems i blew my head gaskets, soon to get fixed though.



wayne
Dodge Dakota
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9/04/2008
21:23:38

4.7 exhaust leak
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I have just gotten a leak in my left exhaust manifold area . after a lot of inspection it seems like the bottom of the head is oxidizing allowing for the leak.. this truck came from the vermont area. but has been washed every weekend and very well taken care of!! also it has been in alabama for the last year I would like anyone with this same pile of poop problem to let me know what they did to fix this problem!!! thank you



Dman
Dodge Dakota
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9/06/2008
01:25:07

RE: 4.7 overheating
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Be very careful allowing your truck to overheat. Two weeks ago my Dakota 4.7 overheated bad. The in-line filler cap on the top hose had disinegrated. Got it towed home, replaced the hose, thought I was good to go. The overheating had also burned out the exhaust gasket - replaced that. When I got it running again it had a bad miss. Halfway to work the next day the enging light comes on. P0307, #7 misfire. Pulled the plug and it was all carboned up. Replaced all the plugs still had a miss on #7. Also replaced coil plug and injector - $100 bucks. Still had a miss. On the advise of my cousin I pulled the valve cover. Sure enough, the rocker had fallen off. Put it back on and it was ticking bad. Thought the valve was stuck so I ran some Slick50 fuel cleaner through it. It seemed to be gettting better, only had a miss at idle. This was until I was headed to work Thursday. I was running about 65 down the highway and I got the loudest grinding/clank noise I've ever heard come from under the hood. By the time I got pulled over and looked oil and anti-freeze were pouring out of the block faster than if I had pulled the drain plug. I haven't tore into it yet but it is locked up solid. Right now I'm looking for a reman to drop in. So it looks liked the $34 top hose may end up costing me 2 or 3 grand.



Ryan
Dodge Dakota
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9/15/2008
18:13:38

RE: 4.7 overheating
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I have a 2001, 70,000 miles. I am not overheating, my thermostat is working, I have fluid flowing. I am spitting antifreeze out of the overflow at the tank. My windows inside are fogging up. I replaced the heater core 6 months ago. I think that antifreeze is coming in the vent by the windshield. I had my radiator checked, and it was partially clogged. I am stilll having the problem. I am not losing power with the truck, and I dont have antifreeze in oil. I am going to try the radiator cap, and then the return hose. Any one else have any ideas?



valentine
Dodge Dakota
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9/27/2008
13:49:27

RE: 4.7 overheating
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04 dakota quad cab 4.7 v8 ....2 months ago i started getting hot. termostat i replaced, then new water pump and finally a new raditor. ran great for two month, and now the same exact thing. Seems like the overflow tank is filling up like before and ive always had a water problem under the passenger carpet. Can any one help me with where to start. please.



Ryan
Dodge Dakota
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9/27/2008
16:56:17

RE: 4.7 overheating
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I have figured out what the problem is with mine. I replaced the radiator cap, and the truck ran great for a couple hours. Then it turned out that it was the heater core. Once I bought the new cap and returned proper pressure back to the system; it spit antifreeze all over the drivers side floor. It turned out that my 6 month old heater was leaking the whole time.



daddio
Dodge Dakota
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9/27/2008
19:33:39

RE: 4.7 overheating
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valentine you need a new radiator cap. and the water under the carpet may be from the a/c drain being stopped up.



sam
Dodge Dakota
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10/04/2008
01:00:38

RE: 4.7 overheating
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My truck has been overheating in warm temps for quite some time now. Actually, it has not ever really gone all the way to the overheat point but it has been at 3/4 on the temp gauge. I have read a lot of people suspecting warped heads or failed head gaskets and this is not very common with these engines. Not to say that it does not happen but the warped heads usually are a result of the overheating and not the cause. The cause on my truck was the build up of sand and bugs in the radiator and condensor fins. It is not very easy to back wash these components without removing them. I removed them and washed out the debris and it is now operating in the normal range. I am hoping that no damage has been done to the heads but time will tell-so far so good.



Jacobus
Dodge Dakota
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10/31/2008
13:00:10

RE: 4.7 overheating
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Y'all,
A non-overheating but similar problem:
2001 Dakota, losing coolant through the reservoir, system has been pressure checked and given a new radiator cap, no overheating, no coolant inside the cab, just slow constant coolant loss. Ideas??



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