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Mikey
Dodge Dakota
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12/24/2007
11:49:10

Subject: Temp Gauge
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Could someone please help?
I would like to know what the coolant temp should read on my 99' 5.2 slt. On the gauge, mine reads at about half way in between 55-100.
Could everybody let me know what there's runs at.
Please.
Thank you.

Merry Christmas All



Curly
Dodge Dakota
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12/24/2007
13:20:15

RE: Temp Gauge
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Either your Tstat is stuck or the temp sensor failed. 180 - 190F If your talking C then I wouldn't know. Happy Holidays



Scott
Dodge Dakota
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12/24/2007
15:40:45

RE: Temp Gauge
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whether its in 'F or 'C the gauge position should be about same.... if its in the middle of the gauge sweep it should be fine and at normal operating temp.... now if the needle sits more towards the cold mark meaning like it barely moves from a cold start then the stat is stuck open.... now if your more towards the hot mark then ya got stuck shut stat or bad fan clutch or even possible restricted radiator



Mikey
Dodge Dakota
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12/26/2007
02:52:24

RE: Temp Gauge
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Curly.
Would a bad temperature sensor stop my engine temp from getting hot?
I was always under the impression that it only tells the gauge what to read on the instrument cluster.
Scott.
I'm not really sure that it could be the stat, cause I've gone through about 6 of them. Two each of Partsource (Motorad Brand), Napa brand. One of Canadian tire brand and one dealer (stock replacement). And a cooling system flush.

Thanks all.




Josh
Dodge Dakota
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12/26/2007
07:49:25

RE: Temp Gauge
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The sensor only feeds the gauge. Put a new one in and see if that makes the gauge read normal.




Mikey
Dodge Dakota
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12/26/2007
13:05:02

RE: Temp Gauge
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Actually I have been reading that they can also communicate with your PCM to regulate timing and other stuff that can cause poor mileage and poor and performance(and maybe affect your engines ability to get up to operating temp). But I'm not sure if that is the way they work on a 318 Mag. If they have 2 wires coming out of them, one of them goes to the console, and the other one goes to the PCM,I think.
Can anybody else confirm this.
Thanks Josh, but the heat does seem to be way off what it should be. I'd hate to replace a sensor just to make my gauge read 10-15 degrees different. Cause I won't be able to return it if it only does that.



Curly
Dodge Dakota
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12/26/2007
17:43:41

RE: Temp Gauge
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Mikey are you getting heat in the truck?



Mikey
Dodge Dakota
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12/26/2007
18:47:34

RE: Temp Gauge
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Very poor heat.
It starts to get hot when the engine is at about 2000rpm and in park, if I'm on the highway at a steady rpm it can be bearable. But with our winters in Winnipeg it can get pretty frickin cold.
I've taken a temp gun to my buddied 97 Ram 5.2 Magnum, and all of the temps coming from the heater core and to the heater core, all the rad hoses, the block itself and even the inside vents, and he is running 10-20 degrees hotter all around.
I haven't had this truck since new so I'm also starting to think that it could have an aftermarket rad or something else to help it run cooler. I also had a crappy 195 stat and it was throwing codes cause the engine was not at operating temp for long enough. I put in a bunch of new stats and the problem with the check engine light went away but I'm still getting crappy heat. I have a 195 from the dealership in there now.
Help me Curly.
Help me Josh.

Help me anybody!!!!



Curly
Dodge Dakota
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12/26/2007
20:26:09

RE: Temp Gauge
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Start by changing the coolant tempt sensor. The're cheap but I really do think your Tstat is stuck open. Avoid MotoRad, I posted awhile back I went through 3 of their FailSafe Tstats in a month. I had 2 stuck open and one Stuck closed. The funny thing behind the FailSafe was supposed to be if they fail they stay open.



.boB
Dodge Dakota
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12/27/2007
11:36:13

RE: Temp Gauge
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You could still have air in the system. The top of the radiator should be about the same temp as the bottom. If not, there's probably a big air pocket stuck in there.

Did you drill a hole in the thermostat before installing it?

Does it have a stock water pump and pulley?

Does it have an electric fan? If so, when does it come on?



Mikey
Dodge Dakota
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12/27/2007
17:39:43

RE: Temp Gauge
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.boB
Yes, I drilled out the edge of the stat.
No, actually I had to replace the (I think) stock water pump the first winter that I got it, but I still don't know if that was the stock one that I had to replace. The pulley I'm not sure about, I imagine that would get changed with the water pump would it not? I had to take it to a shop and get them to do it cause I live in an apartment, and I can only do my own work in the summer.
No, it has the 'stock' mechanical clutch fan. As far as I know it's the stock one.
Also, I was under the impresion that if I had air in the system that I would overheat unless it was in the heatercore?

Curly, is it really possible to get 6 bad stats in a row, most from different makers. I would imagine that anything is possible, but aren't we talking astronomical odds.

Thanks.



well
Dodge Dakota
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12/27/2007
18:51:17

RE: Temp Gauge
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"I drilled out the edge of the stat. "

dont know why you would
but theres your trouble
if you drilled the tstat
you have water circulating
without reaching full temp
i will also bet your using more gas
then you have before?



dude
Dodge Dakota
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12/27/2007
20:23:31

RE: Temp Gauge
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factory thermostats for the 4.7 engine
have a notch along the edge to properly
hold/locate the rubber seal.

they also have a 'piddle (?)' valve,
a small hole that allow steam pockets
on each side of the thermostat to escape
when in the closed position.

This 'valve' also allows a bit of coolant
flow thru the rad when the engine is cold.



Mikey
Dodge Dakota
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1/11/2008
17:39:17

RE: Temp Gauge
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O.k
Everything is getting even stranger with this whole thing.
Took it back to the shop and got them to backflush the heatercore, and just generally check the whole system out.
They couldn't find anything that is really wrong that would cause this to happen.
One crazy thing that I did notice , and hopefully someone can answer, is that after I let the engine get as warm as it will on it's own, while it's running. If I take up the rpm's to 2000 and hold it there for about 5 mins, the gauge will not change at all. If I bring it up even more to 2300-2500 rpm's for another 5 mins the temp will come up to 100 degrees on the gauge and the heat really comes up inside the cab. If I let it idle for 10-15 mins after the heat comes up to 100 degrees it will keep that heat where it is and run with lot's of heat until I shut it down. After it cools down and I start it up again, I have to go through the whole deal again, with warming it up and then taking the rpm's up to 2500 again for about 5 mins.
This whole thing is really starting to piss me off!!!
Anybody have any thoughts after hearing this new info.

Please help.



Robby
Dodge Dakota
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3/17/2016
14:42:40

RE: Temp Gauge
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Where can I at a temp gauge to my 2000 4.7.



Glenn Morriso
Dodge Dakota
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6/08/2017
14:49:49

RE: Temp Gauge
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When it is hot out my temperature gauge goes up all the way till check gauges light comes on. It does not overheat but you can tell something is hot. If I turn on the heat full blast the gauge will go down.



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