Are these high idle temperatures normal?

[Steel City 06]

The Explorer 11-blade fan and HD clutch is probably the most powerful cooling option that is bolt-on, way more powerful than the higher fan blade options and HD clutches sold for the TJ. That said it is a huge power suck when it is engaged, and will heavily impact your fuel economy. There are diminishing returns with increasingly powerful fans as well.

The Camaro fan is very powerful as well and way easier to control, since you can run it at only the speed you need at the moment, and also have a very high upper limit of airflow. At engine idle RPM, the Camaro fan can put more air through your radiator than any clutch fan could since the clutch fans are limited to around ~90-120% of engine RPM when engaged, but the Camaro fan can run anywhere from 20-100% speed independent of engine RPM.

 

[bohuggabee]

2002 TJ, I put on a new fan clutch, thermostat and housing, new radiator with a flush and new coolant. Jeep runs perfectly fine when driving but when idle for about 15-20 min it will go to about 225. In the summer in Arizona where temps are 110f+ will this cause my jeep to overheat? Pic shows 215 but it goes up to about 225. Thanks

View attachment 590144

Oil pressure will go up and down... but my 99 tj heat soaks on hot days if i idle too long. My thermostat never goes above 210 though. The heat soak is an issue with my injectors and seals. . It stays dead on. So this could be the beginning of an issue. One simple red neck trick is to use a higher water ratio to your coolant and bleed the cooling system to see if the temperature drops. You would create a small leak in the cooling system. If it doesnt drop. Then it could be a clog in the system flow or a bad sensor. It wont harm the jeep to try this. But you will need to flush it after and refill with 50/50. But higher water is a great steam that wont poison you.

 

[TallGuy]

Nothing to really add here, but pretty much my same journey right now with my '02. Couple weeks back I overheated with the AC on. Check Gauges lit up and temp was pegged into the red, so I pulled over and sat for awhile.

Replaced a bunch of components and did a major flush. Seemed to help quite a bit since my rad was pretty gunked up. We've been seeing triple digit temps here in the valley and my gauge is hovering a few ticks abive 210 with "AC" on.

I just replaced the condenser as it was leaking and did a full evac and recharge. Now I'm watching that temp gauge like a hawk.

Some great info on this thread. I'll look into changing out the clutch soon bc I think it's original. Looked fine when I pulled it to do the water pump. Guess it wouldn't hurt to upgrade. I was looking at the 2771. I can't seem to find a 6 blade fan tho.