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Old 04-05-2007, 05:47 PM   #1
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Temperature Question...

I just got my 2004 Wrangler under a week ago. It has only 16k miles, so it was well under-used. Sometimes I think that can be a bad thing.

Anyway, It got cold here in Northern NJ again and I noticed a slight "antifreeze" smell for a minute or two, then it seemed to go away. I noticed that the temperature gauge was running a little over the halfway mark. I'm not sure what temperature it was running at, but what is the normal running temperature for a TJ? What does your stock temperature gauge normally run at?

Thanks for the help.

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Old 04-05-2007, 06:02 PM   #2
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I just checked the gauge and it was running at a little over 210, maybe around 215.

I checked the antifreeze overflow and it was right in between the two lines (Full & Empty) This is a 6 cyl. Could it just be the thermostat? If so, how much is it and could I do it myself?

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Old 04-05-2007, 06:19 PM   #3
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Mine normally runs around 210 on the road. I have an 04, 4.0 I6. Thermostat is pretty easy to change yourself, they only run a few dollars. But the temp you are reporting is pretty normal, so I don't think it's necessary.
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Old 04-05-2007, 06:20 PM   #4
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215 is perfectly normal for a Wrangler to run at. The temp light won't even kick on til it gets over 240 I believe. So you are fine with that.

As far as the smell, can you detect any kind of spillage that has occured from rad, hoses or overflow? What about on your hood. Can you see any over spray on it where the bottle is?
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Old 04-05-2007, 06:24 PM   #5
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215 is perfectly normal for a Wrangler to run at. The temp light won't even kick on til it gets over 240 I believe. So you are fine with that.

As far as the smell, can you detect any kind of spillage that has occured from rad, hoses or overflow? What about on your hood. Can you see any over spray on it where the bottle is?

OK, I feel a little better about it, but now I will keep an eye on it. When I looked under the hood, I did not see any leaks or spray anywhere, but I caught a wiff of antifreeze as I opened the hood. Should I fill the overflow container to the FULL line?

Any other thoughts on the smell being a problem?
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Old 04-05-2007, 06:30 PM   #6
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I just looked again, and I saw nothing. Not a drop on the ground or anywhere.

Could it be something since it wasn't driven much?

Also, what are the pros and cons of running a 180* thermostat or a 195* thermostat?
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Old 04-05-2007, 06:40 PM   #7
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the 195 is the stock one. the 180 will just lower your operation temp. you may run a little richer but you wont see any gains from it.
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Old 04-05-2007, 06:43 PM   #8
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Also, what are the pros and cons of running a 180* thermostat or a 195* thermostat?
Other people might have a different opinion, but I personally don't feel that there is an need to run a 180* thermostat on our Wranglers. Jeeps engines are designed to run at 210 normally and will start to run rich if ran much cooler than that when warmed up. Our engines run at their most efficient state at the 210 mark.
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Old 04-05-2007, 06:59 PM   #9
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I believe i have the low temp termostat and my heater is preatty cold in the winter.thats the only con i can think of for the low temp termostat.

Unless i drive it like its stolen my arrow stays bellow the halfway mark!!!
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Old 04-05-2007, 07:17 PM   #10
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Running a cooler thermostat than the factory specified 195 degree model will just cause problems. A cooler, even just a 180, thermostat will cause the engine to take longer to reach its designed-for temperature. Plus, in some states, that cooler thermostat will cause it to fail an emissions test as the engine needs to be fully at temperature to pass the smog tests.

Finally, a cooler thermostat can cause a significant reduction in mpg since in the right climate conditions it can keep the engine in the warm-up mode which keeps the air fuel mixture overly rich.

Run the proper 195 degree thermostat, your engine will be much happier at its designed for temperature. And 210 or so is its normal temperature.
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Old 04-05-2007, 10:33 PM   #11
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Newer Fuel Injected motors need to run warmer(195 thermostate) to keep down on pings and knocks due to no lead in the gas.

Every one of my family's Jeeps(all with 4.0L) run abour 210-215.
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Old 04-05-2007, 11:29 PM   #12
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Newer Fuel Injected motors need to run warmer(195 thermostate) to keep down on pings and knocks due to no lead in the gas.
The cooler the air the less chance of pings there is unless you're using really low octane fuel.. when the engine runs hotter you will get more pings... NA engines dont have much of ping problems unless its freezing cold outside, you are using the cheapest gas available 86 or so, you have 9 to 1 compression ratio or above and you just started your engine. However pings are a major problem in boosted engines .
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Old 04-05-2007, 11:40 PM   #13
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LOL - I donno what I was talking about... talking with a friend on MSN at the same time about his Supra and talking here is no good... Sorry, what I ment was that they help reduce wear and emmisions buy keeping the motor at the right temp. Donno if the pings/kocks crossed over from talking with him.
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Old 04-06-2007, 02:05 AM   #14
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Thanks for all the information!
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Old 04-06-2007, 08:20 AM   #15
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...at the same time about his Supra and talking here is no good.
i came from the racing world few months ago.. When you turbo or supercharge an engine you have to run high octane gas in it otherwise it will ping like a bell when you try to drive it above 3-4 psi of boost. When you boost it above 6psi this creates a lot more heat so the air going in is too hot it will again start pinging and thats not good at all and can be fatal for the engine. In that case you have to add an intercooler to cool the air temps down. The only pinging you can have is if you start your cold engine at freezing temps and you have really low octane rating in it with +9:1 compression pistons (wranglers have only 8x:1 so you can run cheap on the gas) Emisions is correct though.. too cold needs more fuel and creates more smoke
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Old 04-06-2007, 10:34 PM   #16
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Yep - I know all about boost and the effects it has on your pedal foot Was an import guy all through highschool and helped several friends build motors(Supra, Civic, RX7).... turbos are cool, but too much of a hassle when it comes to heat in the desert... thats why I stuck with my Jeeps
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Old 04-06-2007, 10:37 PM   #17
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I don't know if it has anything to do with the temp or what, but my jeep has a little ping sometimes when I accelerate, sounds like it needs better gas, but I hate to start running plus or premium, because I know it will ping if I ever go back down.
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Old 04-06-2007, 11:43 PM   #18
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I don't know if it has anything to do with the temp or what, but my jeep has a little ping sometimes when I accelerate, sounds like it needs better gas, but I hate to start running plus or premium, because I know it will ping if I ever go back down.
Ping normally indicates carbon build-up inside the combustion chambers. The built up carbon continues to glow after the combustion stroke which then prematurely ignites the air-fuel mixture prematurely during the next combustion stroke causing pinging/pre-mature detonation. Built-up carbon is normally caused by driving the engine too conservatively... which might seem counter-intuitive to some.

You can get rid of carbon deposits by SLOWLY trickling 12-16 ounces of plain water into the throttle body as the engine runs just above idle, slowly enough that it takes 1-2 minutes to drain the container. NO, this will not cause hydrolock if you simply trickle it as described, and it will leave your combustion chambers sparkling clean. This is a 50+ year-old technique that works very well... and it's free. No need for anything exotic, plain water works as well as anything else for this job.
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Old 04-07-2007, 12:00 AM   #19
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Thanks Jerry, I will definitely try this. I had a 90 Olds Cutlass Calais that my grandparents bought new and gave me when I turned 16 that did the same thing. I guess it makes sense why now!! They were definitely very easy on a vehicle and that makes me feel good about my Jeep. I have only had it since December but I would be very glad to know the previous owner was too easy on it.
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Old 04-07-2007, 12:05 AM   #20
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Yes - sometime you need to drive it like you stole it
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Old 04-07-2007, 08:57 AM   #21
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Quote:
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Yep - I know all about boost and the effects it has on your pedal foot Was an import guy all through highschool and helped several friends build motors(Supra, Civic, RX7
hey take a look i'm senior in high school Id love to turbo my wrangler btw.. too bad the only kit i've seen is like 4k and it sucks twice the gas of my old miata.. and if i turbo it.. oh god :cry: That would be sweet though turbo wrangler

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