This was taken couple weeks ago. Should I be worried?

 

That app sucks. And your 2 separate pictures one is Fahrenheit the other is Celcius.

EDIT: The acceptable range for an engine to run at sits between 195 degrees and 220 degrees Fahrenheit. This assumes a person is running a 50/50 mix of antifreeze and water.

 

190s is perfect and where it should be.

 

185 is fine.

Does the corolla use a 180 degree fahrenheit thermostat to open? What temp does the fan turn on?

 

BTW 85C is 185F and that pictire like your guage are in sync. Mininum proper temp warmed up is at least 180F so the engine can flow properly. I donf recall seeing a thermostat opening any lower than that. There could be some weird one but I highly doubt it.

 

Speaking of thermostats do they finally make them better or is it the coolant that easier on them now? Seems whem I was young they were like changing oil. Stick open or stick close. I changed only 1 in iover 20 years anout 10 years ago and NO it was not stuck open! Only rhing a throttle kick in park did was heat up even faster. In traffic to boot saw my guage start flying up to red zone. Managed to get off the road in time just before the bridge ramp in traffic hour. and pull over before my poor Elantra blew a head gasket. And 2-3 minutes from home. The stiff gets how damn fast but biy does it take a long time to get to a cold enough temp to risk the drove home. Pulled over. Took a nap and made it home later. No engine damage just the sweet smell of the overflow tank boiling out.

 

Good to know 180ish is normal thanks!

 

Cooling system

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1 - water inlet with thermostat, 2 - water pump, 3 - throttle body, 4 - EGR valve, 5 - EGR cooler, 6 - water by-pass outlet, 7 - flow shutting valve (heater), 8 - flow shutting valve (ATF), 9 - oil cooler. a - from radiator, b - to radiator, c - from heater, d - to heater, e - from transmission oil cooler, f - to transmission oil cooler.​

A fundamentally new cooling system for Toyota - with an electric pump, electric thermostat and shut-off valves.

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1 - radiator, 2 - reserve tank, 3 - water inlet with thermostat, 4 - water pump, 5 - cylinder block, 6 - cylinder head, 7 - EGR cooler, 8 - EGR valve, 9 - throttle body, 10 - flow shutting valve (heater), 11 - heater radiator, 12 - transmission oil cooler, 13 - flow shutting valve (ATF), 14 - oil cooler. a - upper water jacket, b - lower water jacket, c - sub-jacket, d - passage​

The electric pump allows you to adjust the coolant flow at the discretion of ECM.

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1 - water pump. b - stator, c - rotor, d - shaft​

The accelerated warm-up function provides the fastest reaching of economical operation modes and is performed by two shut-off valves that can exclude the heater and the transmission oil cooler from the circulation.

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1 - engine, 2 - flow shutting valve (heater) (closed), 3 - flow shutting valve (ATF) (closed), 4 - heater radiator, 5 - transmission oil cooler, 6 - water pump, 7 - water inlet with thermostat, 8 - radiator, 9 - flow shutting valve (heater) (open), 10 - flow shutting valve (ATF) (open). a - early warm-up, b - heater priority, c - output enhancement, d - max cool, e - when current is not applied to the thermostat with heater, coolant flow volume is increased, thus output is enhanced. additionally, applying current to the thermostat with heater decreases thermostat opening temperature, ensuring cooler efficiency, f - this discontinues coolant flow of the heater radiator unit sub-assembly, ensuring cooler efficiency, g - EGR cooler.​

When the current is applied, the valve is held in the closed position. If the current is not applied and the pump is running, the valve opens under the force of the coolant flow and remains open until the flow stops.

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1 - housing, 2 - spring, 3 - valve, 4 - core, 5 - coil, 6 - yoke​

The nominal temperature of the thermostat opening is 80-84°C (176-183.2°F)

The current supply to the thermostat heater allows to increase its opening under significant load conditions, lowering the temperature in advance and providing higher power output without the risk of detonation.

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1 - heater, 2 - wax​

The engines are equipped with separate fan motor control unit, which allows to adjust fan speed depending on the coolant temperature, refrigerant pressure, vehicle speed and engine speed. The fan - single, large diameter.

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1 - radiator cap, 2 - fan shroud, 3 - cooling fan motor, 4 - fan, 5 - drain plug​

Integrated control of the thermostat, water pump, valves and fan motor provides improved warm-up, reduced friction losses and better fuel economy.

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a - no circulation (starting calibration), b - restricted flow rate, c - normal flow rate, d - combustion chamber wall temperature control, e - flow rate for minimum piston slap, f - flow rate (10° temperature difference between engine inlet and outlet), g - normal flow rate (after thermostat open depending on the load), h - cooling fan ON temperature varies (depending on the driving conditions)​

Toyota engines - A25·M20 - Dynamic Force series (R4) (toyota-club.net)

 

What do you think is wrong from 20 years 180°F to 195° has been the norm. The higher temp is for emissions. They want to run the heads hotter than in the past for emissions.

 

Keep in mind too that the system is under pressure most systems are 13lbs. to 18lbs. systems today so that greatly increases boiling temp as well. If it is getting to 195°F than staying there all is fine! If it was going much higher under non-towing, non-mountain, non-desert driving I would be concerned. If it was swinging all over the place I would be concerned but all sounds good.

 

Using Veepeak OBDCheck with car scanner app. Is this a normal reading? Temp Gauge on Dash is in the normal area.
View attachment 333192 View attachment 333193

Arizona, eh? Do you run on 0W-20 engine oil?

Is your AC on? Why is blower motor speed at level 8? It's also about 100 degrees ambient there, so yeah she may run a tad hotter.

Open your windows, turn AC off, and run the heater at maximum (HI) temperature and full blower speed while keeping an eye on your coolant temperature... See what happens. 😅

 

Arizona, eh? Do you run on 0W-20 engine oil?

Is your AC on? Why is blower motor speed at level 8? It's also about 100 degrees ambient there, so yeah she may run a tad hotter.

Open your windows, turn AC off, and run the heater at maximum temperature and full blower speed while keeping an eye on your coolant temperature... See what happens. 😅

Gotcha makes sense. Yes AZ, no running 0W-16, just started car with AC and blower automatically ramps to high