4.7HO operating temp - JeepForum.com
 
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post #1 of 11 Old 06-05-2020, 04:34 PM Thread Starter
smokeyyank
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4.7HO operating temp

So quick question. My dad has been driving my Jeep around till I get down the hill to snag it. Earlier he said that the temp gauge on the dash was only reading 210 but the traildash hooked up to the OBD II was showing 224. So my question is what is the "normal" temp and is 220 in traffic going uphill on a 90+ day unreasonable? I know these do not like heat so just want to make sure I'm not creeping towards another issue. From what I've gathered up to 230 is consider within spec but want to double check.


04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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post #2 of 11 Old 06-05-2020, 09:59 PM
bbacus
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I have the 4.7 in my 2000. Sits right at 210 no matter what I’m doing...in AZ with many 100+ days
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post #3 of 11 Old 06-05-2020, 10:59 PM
speednjay
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Temps on my wj ho typically sit under the 210 mark and never go past 210. Even on the hottest Bakersfield days 110-115 degrees sitting in city traffic the engine temps hold steady.
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post #4 of 11 Old 06-06-2020, 06:14 AM Thread Starter
smokeyyank
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So I guess the other question is other than your dash gauge have you verified it is actually 210? My dash shows 210 but the traildash show different.

04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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post #5 of 11 Old 06-06-2020, 08:21 AM
Bigrigr
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I do believe that 220-230 is within spec, I have had mine that hot before, and my son has had His that hot recently, but both of us were pulling over and figuring a solution to cool it down when 230 was met. We were not happy with 230, but neither of us seem to have any ill effects from a short term jaunt there. The electric fan on ours doesnt even kick in till 220, so i think its fine once in a while. That being said......I recently replaced my radiator,Thermostat, fan clutch and fan assembly(ranger upgrade), at different times, for different reasons. My Jeep never gets above 200 degrees now unless on a long hard pull uphill and offroad. 210 is the highest I see now. Seems the fan clutch is the first to go, but it is such a long slow walk out, that you dont notice at first, then by the time your running hotter, you find its shot and barely working. My original radiator was horribly plugged up with dust and dirt on my first excursion with high temps, and it made a huge difference to spray it out at the carwash as well. My money is on a slightly plugged radiator(exterior or interior) and a barely working fan clutch that keeps you dancing with the heat devil.

'00LMTD-4.7l,242hd,D30,D44A,3.73's,True-trac front,Spartan rear,4" short arm lift,JK'sW/32's
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post #6 of 11 Old 06-06-2020, 10:54 AM Thread Starter
smokeyyank
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All the cooling stuff was replaced. Most times it's fine and last year a few times going over the passes it would get up around 220 in the summer months but cooled back down. Going to take a infrared thermometer to make sure its reading right.

04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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post #7 of 11 Old 06-06-2020, 11:32 AM
Bigrigr
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Wise, could even have a bad sending unit for the gauge...You do have some serious mountains to climb over there, and that just the freeway! ha ha

'00LMTD-4.7l,242hd,D30,D44A,3.73's,True-trac front,Spartan rear,4" short arm lift,JK'sW/32's
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post #8 of 11 Old 06-06-2020, 02:25 PM Thread Starter
smokeyyank
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Oh yeah my dad is about 9000 ft and in the 10 mile drive from the highway its 3k elevation gain.

04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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post #9 of 11 Old 06-07-2020, 07:26 AM Thread Starter
smokeyyank
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So just to close this out. Coolant was low so topped that off. Drove the jeep back to my place last night which is over Vail pass etc. So lots of hill climbing. Temp got to 215 on the traildash but never higher. Didnt get a chance to do the infrared thermometer.

04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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post #10 of 11 Old 06-07-2020, 04:16 PM
Bigrigr
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I would make sure you dont have a leak somewhere, just to be safe, but glad it was something easy.

'00LMTD-4.7l,242hd,D30,D44A,3.73's,True-trac front,Spartan rear,4" short arm lift,JK'sW/32's
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post #11 of 11 Old 06-07-2020, 04:54 PM Thread Starter
smokeyyank
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Will do, so far only thing leaking is the damn tranny lines. Going to by pass the rad and run all new lines to a remote cooler.

04 WJ, 4.7HO
3" IRO lift, fastman TB, 32s, lunchbox rear 242HD, 3" exhaust
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