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Re: 4.0 operating temp
[Re: bigblock340power]
#1651786
07/28/14 04:14 AM
07/28/14 04:14 AM
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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
master
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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200-210* is normal, ping doesn't happen until 220*...I have a stroker and its compression was running about 215 psi, I started to have overheating problems with my warn winch. Aluminum radiator helped but it was not enough...I had to drop the compression and put in a 180 stat to get it under control. My wifes 4.0 never has a problem, even with the AC on and 100* temps, only gets to 215*. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: 4.0 operating temp
[Re: gch]
#1651787
07/28/14 03:59 PM
07/28/14 03:59 PM
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Joined: Apr 2010
Posts: 10,570 Sunny South Florida
Golden-Arm
I Live Here
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I Live Here
Joined: Apr 2010
Posts: 10,570
Sunny South Florida
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that's not really hot. the 195 number is where it opens, not what temp you'll run at. 10 degrees hotter than the stat, isn't anything to sweat. running a cooler stat won't necessarily make you run cooler. it will just open sooner. it regulates temp to a point, but the engine is going to run at a temp, it's going to run. use a high flow stat, if you want. remember to put a "burp" hole in the disc, if it doesn't have one already to prevent air pocket.
"When Tyranny Becomes Law, Rebellion Becomes Duty"
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Re: 4.0 operating temp
[Re: Golden-Arm]
#1651788
07/28/14 06:21 PM
07/28/14 06:21 PM
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Joined: Dec 2005
Posts: 1,157 Cruising!
QuickDodge
super stock
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super stock
Joined: Dec 2005
Posts: 1,157
Cruising!
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My 4.0 Cherokee used to run at an indicated 210 degrees. I was never concerned about it. Back in the days when 160 and 180 degree thermostats were common, 210 degrees would have been considered hot. Since the car manufacturers switched to 195 degree thermostats, most vehicles run at temperatures over 200 degrees. A hotter engine means better gas mileage and lower exhaust emissions.
Some folks say the cooling system on the Cherokees is marginal. I never had any trouble out of mine, but my Cherokee had an easy life.
Last edited by QuickDodge; 07/28/14 06:28 PM.
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