Sandy , 190 may be fine . Too many variables to say xxx is just right. One thought , put on a low pressure cap, like 5 psi ; it would vent at well over 212 still, but avoid really high pressure in the cooling system caused by 15psi or more caps. . If it vents , something not right but chances are it will not ever vent . If it does not , you are in good shape , no matter what gauge says. The problem in this : , the real one, is high pressure cap and real overheating can blow out core plugs on block or head .., or hoses . The core plugs Chrysler uses are extremely dependent on skill of installer . They blow out easily if not set exactly right . Better to add a few quarts of water if low pressure cap opens than deal with core plug blow out on a highway due to high pressure cap . If a real Problem. That being said the gauges are not very accurate . If it stays under a real 212 you have no pressure , all is ok . It may go up after shutoff, ignore that . My .02 John
Sent from my iPhone
Hi all,
good comments so far.
Question.
Is the 190 degree reading my mechanic got with infrared reading normal?
What temp should an engine be running at. ( usually)
thanks
Steve Beard
Steve et al,
The best tool I've found for diagnosing engine temp issues like this is an infrared thermometer:
http://www.harborfreight.com/non-contact-infrared-thermometer-with-laser-targeting-60725.html
I have one and use it for many more purposes than I would have expected when I bought it.
Automotive uses like diagnosing the problem described here, exhaust manifolds, reading temps of swimming pools, roofs, furnace ducts, deck surfaces, refrigerator/freezers etc.
Wouldn't be without one.
Good day to all 300 ites,
Getting ready to drive the F to the spring meet in NY which at this time is probably not going to happen.
quick rundown-
put 5000 miles on the car last year- no cooling problems. needle stayed on middle of temp. gauge.
put 800 miles on the car this spring, still no problems.Pulled radiator a month ago and had it tested. It was Ok.
Last week went out for 200 mile run, no problem, next day 100 miles and gauge moved to close to Hot.
took it in to the mechanic Monday, infrared reading showed 190ish. at both hoses
New water pump, thermostat, all new hoses.
Flushed engine 2 times .
Picked up the car yesterday and on the 5 mile drive home temp gauge went to below hot?
rebuilt motor 30 years ago but less then 200 miles on the motor till last year.
thanks in advance for input
Steve Beard
300F in Delaware, ohio.
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