Jeep jk running hot

Haven't done a test yet but I believe that removing the air dam is a big contributing factor to hot Jk's. The air dam creates a low pressure area that helps pull air through the radiator. ... but in the programming. I suspect that the lower temperature Jeeps must be running a different thermostat in conjunction with a different program. 2014 ...

Afterward it was running slightly hot, but only about 212-215 so nothing terribly alarming. My girlfriend took the jeep the next day and it overheated on her way to work. ... 2016 JK Rubicon Hard Rock Auto Trans 2008 Jeep Liberty Auto Trans 1988 E-150 4.9L 5 Speed Stick God Bless Our Troops.11585 posts · Joined 2011. #3 · Aug 29, 2017. I tried them on two different occasions, and they increased engine temps for me. I took them off and boxed them up. My 3.6L runs plenty hot, I didn't need to add to it. 2016 JK Rubicon Hard Rock Auto Trans. 2008 Jeep Liberty Auto Trans. 1988 E-150 4.9L 5 Speed Stick.May 1, 2012 · Mud with cake up the cooling fins and cause you to run hot.... another issue may be your thermal clutch on your fan may be bad and not engaging. You should feel a bit of resistance on the fan if you try and spin it... it should not freewheel.. so to speak. ~Todd~ 2004 X 4.0 5 speed--- SOLD. 4" Lift, 4.56's, 33" Duratracs on M/T Classics. 320 posts · Joined 2008. #1 · Jul 6, 2010. My jeep is currently running hot but only on the freeway. Around the town it runs fine. Fan clutch is good and thermostat is new. Started to overheat after a trip to an ORV park but I washed the radiator out and its pretty clean on the outside. Also drained and refilled the system completely.#1 · Dec 15, 2017. My 2007 Jeep JK with 204,000 miles won't start when hot. Cold starting is fine. After the Jeep runs to full temperature, is turned off and then sits for 30 minutes, it …Overheats Towing. 2011 3.6 WK2 Laredo, 5000# tow package. Bought new. Will not tow 3500# boat trailer over Guadalupe Pass in NM; overheats and goes into limp mode. Changed out thermostat. Changed out single row radiator for two row radiator. No improvement. Had dealer burb system. No improvement.3 posts · Joined 2017. #1 · May 25, 2017. I recently purchased a new 2017 Wrangler Unlimited Rubicon Recon edition. The headlights are great and perform similar to the HIDs on my Audi S5. These headlights appear to have integrated Daytime Running Lights (3 LEDs under the main LED unit) but I have not figured out how they operate.

If your laptop fans are running louder or more frequently than usual, this could be a sign that your laptop is running too hot and needs better air flow, or it could mean that your...Sep 9, 2011 · The thermostat opens at around 195°F, and when the Jeep is moving, the temp will stay there. When not moving, the engine temp will rise to 215°F, and the fan will come on to cool things back down to 195°F, where it, (the fan), will shut off. During the cycling up and down between 195°F and 215°F, The gauge will not move, because everything ... Haven't done a test yet but I believe that removing the air dam is a big contributing factor to hot Jk's. The air dam creates a low pressure area that helps pull air through the radiator. ... but in the programming. I suspect that the lower temperature Jeeps must be running a different thermostat in conjunction with a different program. 2014 ...29 posts · Joined 2008. #7 · Apr 17, 2009. X2. I have a 01 WJ. Mine would over heat only on warmer days when you idled in traffic. The fan control/relay was shot and the electric fan was not cutting on. I checked the fan by running a + and - from the battery. Fan worked. Started it up waited a while and the fan would not come on.kkeeble Discussion starter. 2 posts · Joined 2016. #1 · Feb 13, 2016. Need advice- I have a 2015 Wrangler JK- 14K miles, This week it started overheating. I brought it to the dealer and they stated someone mixed coolant in the radiator, NO ONE has touched the radiator other than the dealership or factory. It was serviced (oil change) 2x once ...Step 3:Again, we have ample airflow across the radiator, so we must inspect the proper antifreeze circulation.If there is a restriction in the system , it willproduce the same affect.Water calcification can accumulate in the radiator and then drastically reduce the flow of coolant at a very high speed. Removing the radiator from the vehicle are ...2018 overheating issues. Hello all! Just recent purchased a used 2018 jk unlimited sport. It's has 98000 miles on it. I'm new new to the jeep community. Long story short the radiator fan is excessively loud and the jeep is over heating, I drove it about an hour and a half from the place I bought it from and now I can't even make it down the street.

P0128 is an OBD II trouble code indicating that your Jeep Wrangler’s thermostat is stuck in the open position, meaning your engine isn’t getting up to the proper operating temperature.. If your Wrangler has a P0128, it is almost certain that it needs a new thermostat. No Heat. A bad thermostat will often result in no heat or less heat than …Has anyone come across this and figure it out. I'm thinking it may be a faulty thermostat or something. I really don't think it should be running around 224-230f while …Are you a proud owner of a Jeep? If so, you know that Jeeps are built for adventure and off-road capabilities. To keep your Jeep running at its best, it’s important to invest in hi...^!!! txt msgs r running language *ruining ^lol, jk!! :) In many casual discussions of language and the internet, it’s not uncommon to hear about how such “textspeak ruins language”...In Stock. $237.99 $394.95. Westin HDX Drop Nerf Steps for 07-18 Jeep Wrangler JK. In Stock. $483.99. AMP Research PowerStep XL for 07-18 Jeep Wrangler JK Unlimited 4-Door. In Stock. $2,299.99. Go Rhino E-BOARD E1 Electric Running Board Kit for 07-18 Jeep Wrangler JK 2-Door.320 posts · Joined 2008. #1 · Jul 6, 2010. My jeep is currently running hot but only on the freeway. Around the town it runs fine. Fan clutch is good and thermostat is new. Started to overheat after a trip to an ORV park but I washed the radiator out and its pretty clean on the outside. Also drained and refilled the system completely.

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Proudly sponsored by Enginetech https://enginetech.com/Engine rebuild kit I used on my 4.0L rebuild: https://amzn.to/2WuNdbuIf my videos have helped you sav...Sinks—and running water in general—are wonderful things. Hot or cold water, whenever we want it, straight out of a tap conveniently located in our own homes? It’s pretty great. But...It seems that there are more complaints from owners with 12 plus 3.6 JK's running hot, but in most instances it's normal. The variable speed fan is a better set up than prior year JK's. Beginning in 2012 with the 3.6 Chrysler went to a variable speed fan, basically low-med-high. A 3.6 will usually run at 210-230 with the AC off.If your laptop fans are running louder or more frequently than usual, this could be a sign that your laptop is running too hot and needs better air flow, or it could mean that your...Automatic transmission fluid level should be as follows, @ fluid temperature: Top "COLD" mark @ 70°F. Halfway between "HOT" & "COLD" @ 116°F. Bottom "HOT" mark @ 165°F. Near top "HOT" mark @ 200°F. If you get variable readings on the dip stick, it's most likely due to reading it at different temperatures.2012 JKU runs hot at highway speeds. I have a 2012 JK doesn't overheat but runs hotter than normal at highway seeds. Replaced thermostat radiator water pump and new factory fan .. Even bought that funnel system for purging the air. Also checked for exhaust gasses in the fluid. Several time's.

Dec 15, 2017 · My 2007 Jeep JK with 204,000 miles won't start when hot. Cold starting is fine. After the Jeep runs to full temperature, is turned off and then sits for 30 minutes, it will crank but will not start. In fact the Jeep shudders when cranking and hot. If it is left to cool for another 30 minutes, it will sputter and start and emit a rich gasoline ... Thread starter. #9. Jeepstin392 said: In Colorado here. 5500’ elevation at home. Typically see 203°-215° running around town. Highway, around here I see 212213°-230°. At altitude (10k-14k’), I see 215°-225° at idle and as high as 252° while driving. This is normal for altitude, but admit, that temp makes me nervous.It does nothing when the key is turned, besides turn the radio/ac on. Yesterday, I noticed “HOT OIL” come up on the dash. I checked oil level. It was fine. Temperature outside have been in the 90-100’s. I doubt that has anything to do with it. Oil has been changed. Engine coolant is good. Not running any codes. Could it be Starter ...It runs hot, also the temp sensor ir located on the left head so the coolant there is as hot as can be in the circuit. 2014 JK Unlimited Rubicon, Copperhead Pearl , minivan engine, 6 speed, 4.88, trussed axles, tons of armor, Rock Krawler X-Factor 2.5" lift, Falcon shocks, 35" Dick Cepek M/T tiresWater Pump Failure: A leaking water pump will result in a drop in the coolant level. but when it actually causes your Jeep Wrangler Overheating, it is more likely to be due to a failure of the water pump. The pump is driven by the timing belt which means when there is a problem with one of them, you are likely to have problems with the other one.'09 JKRU. 4" Teraflex long arm, Teraflex R44 housing, Teraflex / Fox Resis, Poly Performance skids, Nemesis Billy Rockers, Nemesis flares, 37" Nitto Trail Grapplers, 17" 5x5.5" Trailready HDs, Spyntec manual hubs, Teraflex front BBK, Teraflex rear BRK, Mopar BBK master/booster, Superior front & Alloy USA rear axle shafts, CTMs, Reids, Synergy drag link & tie rod, WTOR hydro-boosted steering ...^!!! txt msgs r running language *ruining ^lol, jk!! :) In many casual discussions of language and the internet, it’s not uncommon to hear about how such “textspeak ruins language”...2. Filled the radiator with the coolant along with the resevoir. 3. Turned on the vehicle and left the radiator cap open then let it run for a few mins, 4. Drove it around the neighbourhood. Once I started driving it around was when the overheating started to happen and the radiator fan sounded like a plane engine.Jul 28, 2020 · On hot days (temps in 90's plus), my Jeep would overheat while driving regardless of speed. Higher speeds didn't help cool it off. In older vehicles that had questionable cooling fans, you could just drive 50-60 and the airflow through radiator was enough to keep your engine happy. Not so in the JK. Particularly if you're running the A/C.

Aug 12, 2023 · GreenRubi2015. 1109 posts · Joined 2011. #5 · Aug 14, 2023 (Edited) You still have air in your cooling system if your coolant temps are no longer running between 203F-210F operating temperature after opening up the cooling system to replace those parts. The factory service manual requires the use of an Airlift 550000 vacuum coolant filler on ...

Shop a wide variety of genuine & aftermarket Jeep accessories and parts for Wrangler, CJ, Cherokee & Gladiator. Free same day shipping on most orders. Skip to main content. Menu. Close; Shop by ... Jeep Wrangler JK Showcase. 1997-2006. Jeep Wrangler TJ Showcase. 1987-1995. Jeep Wrangler YJ Showcase. 1945-1986. Jeep CJ Showcase. 2011-2019 …Last winter, I never got my Jeeps heater to function properly. Heat was warm, but never hot. Did several flushes, changed thermostat, etc. Summer before, I had a problem with the Jeep running hot. After all of this work trying to get heat during the winter, the engine temps stayed down all summer. Actually, too far down. Temps run about 190.Details. Effortlessly elevate your Jeep Wrangler's style and access with the Aries ActionTrac Powered Running Boards. These innovative running boards provide a convenient and safe step-up point while adding a touch of sophistication and functionality to your Jeep. When you open your door, the step automatically extends 8" to provide an easier ...Dec 31, 2019 · As noted JK's with with the 3.6 run hot.. fan does not usually kick in till 226-228.. so if under load, steep hill for example, temps in the 230's can be expected.. Best advise is to make sure you have the least amount of stuff you can blocking the grill. sink the winch down in frame, remove grill inserts etc. Climate at the time: Pulling up/down/around 4000-5000 feet south of Flagstaff to Phoenix. Ambient temperature was pushing 105* or so. Running 4.88s right around 3200 RPMs. With AC temp would pop up to 240-244* and on a long incline pull reached 255* for about 5 minutes.The JK is still over heating. Coolant is Genuine Mopar Coolant, also. It is NOT consuming any coolant at all, it has not gone down since the last flush. There is coolant pressurizing the hoses and in the radiator. The heater works fine. However, temps are still reaching 240.May 20, 2014 · I recently replaced all the hoses and a 180-degree thermostat. we recently had a few cold days (teens on my morning commute) and the heat worked just fine the jeep was at 180 degrees the whole commute ( my Superchips tuner has the fan run temps down to 200,205 and high at 210). the fan will run on low for a bit when I run the defroster but it ... They replaced the unit, but the Jeep still is running hot (230+ on moderate hill climbs). Remember, it never used to do this. The mechanic said it might be the thermostat. I had them replace the thermostat. No difference. Anyway, it is now September, and the JK runs right around 210 - 220 on the flat, but will get over 230 and more on hills.Jeep runs hot while driving. I have a 2012 jeep jku sport, It runs hot only while driving, as soon as I park it and just let it idle it cooks down to around 208-215 and stays constant, while driving it has/will get as high as 245, but will fluctuate from 228-235. I have replaced the oil cooler (was leaking), the thermostat, and radiator cap.

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Dec 31, 2019 · As noted JK's with with the 3.6 run hot.. fan does not usually kick in till 226-228.. so if under load, steep hill for example, temps in the 230's can be expected.. Best advise is to make sure you have the least amount of stuff you can blocking the grill. sink the winch down in frame, remove grill inserts etc. kkeeble Discussion starter. 2 posts · Joined 2016. #1 · Feb 13, 2016. Need advice- I have a 2015 Wrangler JK- 14K miles, This week it started overheating. I brought it to the dealer and they stated someone mixed coolant in the radiator, NO ONE has touched the radiator other than the dealership or factory. It was serviced (oil change) 2x once ...Sep 20, 2018 · 42yrs First Jeep Discussion starter. 128 posts · Joined 2013. #1 · Sep 20, 2018. So my engine fan has been running really loud for the past 2-3 weeks. I haven't seen the temperature gage go any higher than the middle. Its really noticeable. I have a 2014 JKUR. My heater is also acting up. It blows hot and then cools off to the point of cool ... Put new Mopar thermostat in, and the JK still runs at 220 on average. Took JK to my other mechanic. He did some research and found that drilling a 1/8" hole in thermostat will allow Jeep to run cooler. Decided to drill hole. The Jeep is still running hot. About 220. Took the JK back to the dealer.FYI hot refers to a (+) wire carrying electricity, and cold refers to one that is not. Grounds are everywhere, so you can get your (-) power from almost any metal surface. 1993 Wrangler S 2.5L/AX-5/NP231 with SYE, Spartan locked Dana 30/Aussie locked Ford 8.8 @ 4.88, SOA lift with 2.5" OME HD springs and front Bilstein/rear Rancho shocks ...Normally when the fan comes on after a few seconds/minutes of starting. There is either air in the coolant lines, or a stuck thermostat. There is a bleeder valve on the top of the thermostat. You may have to remove the air intake to get at it, then use a screw driver to turn the bleeder valve to release the air until the cooler starts spitting out.My 2017 jku Sahara unlimited is still running hot after i changed the radiator cap, thermostat, properly burped the system. My dial is in the middle at...It’s essential to be aware of the symptoms and causes in order to prevent any long-term harm. Transmission overheating may be caused by circumstances such as high temperatures, worn-out gears, or valves sticking to the valve body. Over time, this can lead to expanding gears that bind and create shifting delays. Water Pump Failure: A leaking water pump will result in a drop in the coolant level. but when it actually causes your Jeep Wrangler Overheating, it is more likely to be due to a failure of the water pump. The pump is driven by the timing belt which means when there is a problem with one of them, you are likely to have problems with the other one. ….

Aug 12, 2023 · GreenRubi2015. 1109 posts · Joined 2011. #5 · Aug 14, 2023 (Edited) You still have air in your cooling system if your coolant temps are no longer running between 203F-210F operating temperature after opening up the cooling system to replace those parts. The factory service manual requires the use of an Airlift 550000 vacuum coolant filler on ... 3 posts · Joined 2019. #7 · Mar 25, 2021. Take the cover off the engine, and check the oil cooler. Sits right in the middle of the engine. Mine was starting to leak, and liquid was living in the valley of the engine. This is how I found out mine was leaking:Just got my new to me 2012 JK 2 days ago. Had it shipped it from Cali from a forum member I bought it off of. It has a Bully Dog GT tuner on it. Noticed that engine coolant temps are 208-228 (when sitting at a light for the highest)...avg of 210-215 while driving. However, its only 78 degrees outside here in Ft. Worth, TX.In this video, we're showing you how to install DRL LED running lights on a Jeep JK! The stock JK comes with amber front running lights and amber turn signal...4 posts · Joined 2015. #1 · Jun 29, 2015 (Edited) I have a 2012 wrangler sport 28K miles. I noticed the other day while driving that the radiator fan was on. It seems to be on full blast too. The jeep isn't running hot at all. The temp needle never gets past half or even up to half way. When I start the jeep the fan is not on.Automatic transmission fluid level should be as follows, @ fluid temperature: Top "COLD" mark @ 70°F. Halfway between "HOT" & "COLD" @ 116°F. Bottom "HOT" mark @ 165°F. Near top "HOT" mark @ 200°F. If you get variable readings on the dip stick, it's most likely due to reading it at different temperatures.Overheating & Heater blowing cold air. Driving home yesterday I noticed my temperate gauge go almost into the red (highway going about 60mph). After pulling over and turning the motor off I turned on my heater and could only get cold air. The day before it started overheating I had working heat and the temperature gauge stay at 210 when …The JK is still over heating. Coolant is Genuine Mopar Coolant, also. It is NOT consuming any coolant at all, it has not gone down since the last flush. There is coolant pressurizing the hoses and in the radiator. The heater works fine. However, temps are still reaching 240.#1 · Dec 15, 2017. My 2007 Jeep JK with 204,000 miles won't start when hot. Cold starting is fine. After the Jeep runs to full temperature, is turned off and then sits for 30 minutes, it …If the temp gauge reading is accurate, this reads about 105 C (220 F). This is how it got last weekend on a 10 mile climb at 10% grade. Key Facts: Temp rises only during hard/uphill driving. After climbing a hill, once the grade flattens, the temp will return to normal in a minute or two. Jeep jk running hot, jlaudio_jeep. 252 posts · Joined 2009. #10 · Mar 31, 2012. Remove both lines from the heater core on the engine side. Use one of the lines you removed to run it in a loop and bypass the heater core. If this solves the overheating problem then there is a block in the heater core. Like., Apr 6, 2017 · The reason they did this is they wanted the oil to be hotter and the exhaust gas temps to be lower. By having lower exhaust gas temps they were able to run 20% exhaust gas in the cylinder on the compression stroke rather than the normal 10%. Believe it or not, this actually increased fuel economy by 5 to 6%. , Moved to Arizona last year, and when it gets hot outside (105+), Air Conditioning running, and especially on the freeway (about 3K @ 80MPH), the temp gauge will make its way over to the 3/4 mark. It won't make it any further than that, but runs up in that area every day. It's usually after the first 5 minutes or so on the freeway, and stays ..., Feb 6, 2024 · 1. Park your Jeep with the nose at an incline. 2. Remove the radiator cap. 3. Once the operating temperature is reached, squeeze the main upper water hose to force out any air bubbles in the system. 4. Repeat steps 1-6 multiple times and allow the engine to cool down completely in between. 5. , So we know the 2012+ JKs certainly CAN run cooler if they need to. Yet they were designed to run at the temps they run. Must have been a reason. I was just reading in a car magazine that some new car, forget which one, actually has a split cooling system. The heads run at 195 degrees and the block runs at 220 degrees., Ok, while I was at the Easter Jeep Safari this year my engine started to randomly idle roughly. My engine normally idles around 675 rpm +/- about 25 rpm. I noticed that the rpm would pick up to about 720 then it suddenly drops off to about 500 rpm and when it does it shakes the whole jeep. this only happens when I'm stopped at stop lights/ …, , The thermostat opens at around 195°F, and when the Jeep is moving, the temp will stay there. When not moving, the engine temp will rise to 215°F, and the fan will come on to cool things back down to 195°F, where it, (the fan), will shut off. During the cycling up and down between 195°F and 215°F, The gauge will not move, because everything ..., 30818 posts · Joined 2002. #2 · Jul 2, 2012. It sounds like you are describing some sensor issues that occur when the the Jeep switches to closed loop operation. Test the O2 sensors, they can get old and slow to react. Typical O2 sensor service life is about 100,000-150,000 miles. Replace the coolant temperature sensor on the thermostat housing., Afterward it was running slightly hot, but only about 212-215 so nothing terribly alarming. My girlfriend took the jeep the next day and it overheated on her way to work. ... 2016 JK Rubicon Hard Rock Auto Trans 2008 Jeep Liberty Auto Trans 1988 E-150 4.9L 5 Speed Stick God Bless Our Troops., Radiator Exhaust Gas Test Kit: https://amzn.to/3CThqIBRadiator Funnel Burp Kit: https://amzn.to/3TCKhXAJeep JK Thermostat: https://amzn.to/3TCKTwmIf my video..., yeah, the middle is a bit high for the 3.6L especially if you are driving. But like you, normal temps for my 3.6 is just slightly above the 1/4 line. The only time when I see the temp gauge move is up to slightly below the 1/2 mark, and that us when im driving in a parking lot for like 20 minutes at low speed. The the fan kicks in and the temps ..., 2013 jk running hot above 3000 rpm. I can’t find any leaks in the system. I did try bleeding it today and no luck. Coolant is full an so is the reservoir is just below max. Never had any issues till I was towing the jet skis back from havasu a few weeks ago. Got to 3/4 on temp gauge. And now it likes to go above to 3/4 when I’m not babying it., A built in timer/relay causes the system to go Closed Loop after a few minutes of the engine running. Closed Loop just means that the O2 sensors are being monitored as an additional input to the fuel management system. Fault Codes about coolant temps & Closed Loop - dont mean that a specific temp is required to go Closed Loop ..., Jun 14, 2021 · Joined forum today, trying to figure out issues before spending money replacing parts. My 2016 jk recently noticed cooling fan running high speed more often and temp higher than normal. Upon more attention I noticed it was only running hot at slower speeds and idle, but when rpms are higher, engine cools and high speed fan stops. Thoughts? , My 2017 jku Sahara unlimited is still running hot after i changed the radiator cap, thermostat, properly burped the system. My dial is in the middle at..., 10 posts · Joined 2014. #1 · Dec 20, 2018. Good evening from Florida. Over the last year I have had issues with my Jeep overheating and losing coolant. It is a 2012 JK Sport. It is currently out of warranty. Last year the Jeep overheated pretty good, starting off as a little higher than normal and then over a few months going to 3/4 temp., If the temp gauge reading is accurate, this reads about 105 C (220 F). This is how it got last weekend on a 10 mile climb at 10% grade. Key Facts: Temp rises only during hard/uphill driving. After climbing a hill, once the grade flattens, the temp will return to normal in a minute or two., 2017 Jeep GC SRT, 2021 Jeep Wrangler 392, 2023 Tesla, Model Y Performance, 2021 BMW M340i XDrive, 2018 Mini Cooper S "7" ... Modern engines run hot. If you believe what the experts say there are a few reasons. First is fuel economy. ... on my JK. It helps A LOT in city and low speed driving, especially when the A/C is on. The …, The pentastar does run on the hot side for better efficiency. Also keep in mind that the coolant temperature sensor is located at the left (driver) side engine head. Coolant is pushed by the pump through the engine block (around the cylinders) then through the heads and on to the oil heat exchanger, heater core and radiator via the thermostat., Are you a proud owner of a Jeep? If so, you know that Jeeps are built for adventure and off-road capabilities. To keep your Jeep running at its best, it’s important to invest in hi..., Heat not working properly. msgntsu. Oct 10, 2022. 1. 2. Next. M. msgntsu. New Member. Joined. Oct 10, 2022. Messages. 15. Location. MD. Oct 10, 2022. #1. New …, Jeep Wrangler temp gauge keeps fluxing up and down. Then the fan likes to run loud for no reason sometimes... Then the heat stopped working. All with no ch..., xbeatles4x. 13 posts · Joined 2012. #3 · Dec 8, 2012. The purpose of a thermostat is to let the car get up to operating temperature and then open up to not let it get any hotter. It is the optimal temperature for the car. If you run without a thermostat it would not let the car get up to operating temperature for a long while., A couple of weeks ago the electric radiator fan came on during a 2 hour drive and was very loud. After that day, that fan now comes on at full speed whenever driving more than about 10 miles on the highway. At full speed, its loud! I took it into the dealer and they replaced the TIPM computer and said it was fixed., In Stock. $237.99 $394.95. Westin HDX Drop Nerf Steps for 07-18 Jeep Wrangler JK. In Stock. $483.99. AMP Research PowerStep XL for 07-18 Jeep Wrangler JK Unlimited 4-Door. In Stock. $2,299.99. Go Rhino E-BOARD E1 Electric Running Board Kit for 07-18 Jeep Wrangler JK 2-Door., 3050 posts · Joined 2013. #2 · Aug 16, 2014. Could be whatever they use to clean the fluids off the top of the engine, or old coolant. If your temp gauge is showing that it is not over-heating, I wouldn't worry too much about it. Sent from my iPad using Electrons., RHD 2013 wrangler after 1 1/2 hours radiator fan runs super loud and doesn’t shut off until engine is turned off, on mail route. Any ideas. Usually if the rad is low and the temp sensor senses the engine is getting to hot it will switch the fan into a higher speed to try and cool things. Sounds like a plane taking off., The fan will run with the A/C on or off. It seems that there are more complaints from owners with 12 plus 3.6 JK's running hot, but in most instances it's normal. The variable speed fan is a better set up than prior year JK's. Beginning in 2012 with the 3.6 Chrysler went to a variable speed fan, basically low-med-high. A 3.6 will usually run at ..., May 17, 2015 · The engine has been running this high for 3 years now. There's no mass accounts of overheating penastars in the JK. I think people are trying to find a issue where it does not exist. If it was a aluminum block and iron heads I could see a issue. Since they're the same material they should in theory expand all at the same rates ect. , 10 posts · Joined 2017. #1 · Apr 11, 2021. My 2013 JK (114,000k) is having issues overheating. Thermostat is not that old (about a year) so I replaced the PCV valve which was toast (and quite a pain in the arse). At idle or even low speeds (45-50) it’s fine. But as speed increases the temp goes up., GreenRubi2015. 1109 posts · Joined 2011. #5 · Aug 14, 2023 (Edited) You still have air in your cooling system if your coolant temps are no longer running between 203F-210F operating temperature after opening up the cooling system to replace those parts. The factory service manual requires the use of an Airlift 550000 vacuum coolant …, Stellantis brand Jeep descended on Moab, Utah for its annual off-roading and roadshow and showcased seven concept vehicles. When Stellantis brand Jeep descended on Moab, Utah this ...