what is normal engine temp?

[yellowjip]

hello good day guys..ive noticed that most temperature inquries were based on analog temperature gauges..What is the normal engine temp? I have a mechanical guage in my pinoy wrangler since i have no thermostat in my engine my normal city driving temp is about 150 F, long idle 160F, highspeed running is about 190 F on hot days can go up to 200 F all with AC on.it takes awhile for my engine to warm up..Ive read on how things work.com is normal operating temp is about 200 F and sometimes can go up to 230 F.it said that the internal combustion engine runs most efficient at about 200 F.I also want to add that it also said that thermostat usually fully opens at 180 F.Is this correct?i hope someone can enlighten me..

[oj88]

Generally, that's pretty much correct. Although, different engines from different manufacturers will have slightly different optimal engine temps.

The temperature at which the thermostat opens up kinda gives you an idea about how engine temp varies from one engine model to another. The specs below were taken from the shop manual for the Civic FD 2.0L and 1.8L engines.

Honda K20Z thermostat:
Starts Opening: 80-84 °C (176-183 °F)
Fully Open: 95 °C (203 °F)

Honda R18A thermostat:
Starts Opening: 76-80 °C (169-176 °F)
Fully Open: 90 °C (194 °F)

[mark_t]

hello good day guys..ive noticed that most temperature inquries were based on analog temperature gauges..What is the normal engine temp? I have a mechanical guage in my pinoy wrangler since i have no thermostat in my engine my normal city driving temp is about 150 F, long idle 160F, highspeed running is about 190 F on hot days can go up to 200 F all with AC on.it takes awhile for my engine to warm up..Ive read on how things work.com is normal operating temp is about 200 F and sometimes can go up to 230 F.it said that the internal combustion engine runs most efficient at about 200 F.I also want to add that it also said that thermostat usually fully opens at 180 F.Is this correct?i hope someone can enlighten me..

]

Your cooling system was designed to operate with a thermostat, why don't
you replace the missing thermostat?

It is really pointless to concern yourself with the required normal temperature
without a properly maintained cooling system.

As you have said it takes a while for your engine to warm up.
So you have to fix that because that is where your cooling system is
experiencing a failure or inefficiency.

And with a proper coolant medium you will attain the normal engine temperature.

Check a service manual specific to your engine type.