how hot is too hot
07-14-2011, 05:12 PM
#16
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
If it just goes the one notch past 210 and never higher then you are fine.
07-14-2011, 05:14 PM
#17
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
I never worry about mine unless it is in the red. You will know if you have a problem because these engines run so hot, it will shoot straight from normal temp. to the red if you have a cooling system issue.
07-14-2011, 07:38 PM
#20
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
I beg to differ....first hand experience. My brothers 93 wrangler ran bout 225°(highway) and the ONLY thing he did was swap tstats and it runs bout 215(highway)...and he changef it between two 100°+ days.have you actually tried it or are you going off what you were told or read.
07-14-2011, 07:54 PM
#21
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Mine NEVER goes above 210. EVER! The boiling point of water is 212, so I think anything over 210 is too hot. Try changing out your coolant and put some nice, new, clean stuff in her.
07-14-2011, 08:03 PM
#22
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07-14-2011, 08:32 PM
#24
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Year: 1992
Model: Comanche
Engine: 4.0
Originally Posted by bigvig
Mine NEVER goes above 210. EVER! The boiling point of water is 212, so I think anything over 210 is too hot. Try changing out your coolant and put some nice, new, clean stuff in her.
Sent from my Droid using Cherokee Forum
07-14-2011, 08:41 PM
#25
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Actually, I lie. Last week I blew the heater core and she went to 215-220 a couple times when I had to run errands around town during 90+ degree weather. Started blowing steam pretty fierce and used up almost all of the reserve tank. Other than that, never above the 210 mark.
07-14-2011, 08:48 PM
#26
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Year: 2000
Model: Grand Cherokee
Engine: 4.7
Originally Posted by bigvig
Mine NEVER goes above 210. EVER! The boiling point of water is 212, so I think anything over 210 is too hot. Try changing out your coolant and put some nice, new, clean stuff in her.
Sent from my Garminfone while fighting off ninjas
07-14-2011, 09:12 PM
#28
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Year: 2004 4WD
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Engine: 4.0 All Factory
Last edited by Roadmister; 07-14-2011 at 09:14 PM.
07-14-2011, 09:15 PM
#29
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
Blew the heater core, steam pretty fierce, in 90 degree weather, used all the bottle and only hit 215-220.....I still think your gauge is wacked.
07-14-2011, 09:20 PM
#30
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Year: 1994
Model: Cherokee
Engine: 4.0 HO
How hot is too hot?..........ECU turns efan on at 218F so my guess is that's where the engineers wanted things to start cooling down. If coolant temps are actually north of 222.5, a 180 t-stat would have no advantage over a 195 t-stat.....they're both wide open at 220+ and a properly functioning t-stat only controls MINIMUM coolant temp.
How old are cooling system components? The XJ rad is really dinky, everything must be in top notch condition.
How old are cooling system components? The XJ rad is really dinky, everything must be in top notch condition.
how hot is too hot though? my old one with a split plastic tank didn't go over 230ish according to the gauge.