Normal operating tempature???
#1
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Normal operating tempature???
What is the normal operating temperature for the RX-8 coolant system. The shop manual said the Thermostat initially opens at between 176 to 183 degree (F) and is fully open at 203. Now when the car is running and warmed up what is normal.
As we know the temp. gauge is worthless in the RX but I just received a ScanGaugeII and can now monitor my car's temp. After a short drive I noticed the temp level out at 164 (F) this is in 32 degree weather.
What bothers me is that this is leveling out before the thermostat is even suppose to be open.
As we know the temp. gauge is worthless in the RX but I just received a ScanGaugeII and can now monitor my car's temp. After a short drive I noticed the temp level out at 164 (F) this is in 32 degree weather.
What bothers me is that this is leveling out before the thermostat is even suppose to be open.
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Judderman (03-26-2022)
#6
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Now that the daytime temps are in the 50°s, my running temps are about 180°F.
When I stop, I see 203°F.
In the 100°+ Summer, its not unusual for me to see 225°F or higher (at which time I take severe countermeasures).
The thermostat "cracks" at 176°F. Its not supposed to be completely open until 203°F or so. Full fan temp is 215°F.
Nominal maximum operating temp is considered to be 220°F, which I think is too hot.
When I stop, I see 203°F.
In the 100°+ Summer, its not unusual for me to see 225°F or higher (at which time I take severe countermeasures).
The thermostat "cracks" at 176°F. Its not supposed to be completely open until 203°F or so. Full fan temp is 215°F.
Nominal maximum operating temp is considered to be 220°F, which I think is too hot.
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hufflepuff (03-08-2019)
#7
Out of NYC
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I dont have scangauge, or any computer program (I do have Scanlyser, but their program dont work on my Laptop .... and Last beta I heard was the one Swoope gave me ... *sigh)
but I do have Water temp gauge installed. when it first open, the temp will go about 82 Celsius. in Summer, I've seen About 100 Celsius.
but I do have Water temp gauge installed. when it first open, the temp will go about 82 Celsius. in Summer, I've seen About 100 Celsius.
#8
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Thanks guys, my first couple of drives were short so more observation is necessary but the temp did stop climbing. If the gauge is stuck or not working properly it would help explain two issues I have been having. Low fuel mileage and a long warm up time to get good heat in the car. Both of which I had told Mazda about several times with no resolution.
Again thanks.
Again thanks.
#9
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If you think your thermostat is stuck open, replace it very soon. I had a stuck-open thermostat in my Accord. Didn't replace it right away. It finally failed closed, which led to a fairly tense limp home.
I never expected stuck-open to evolve into stuck-closed, but when I took the thing out and examined it, it became clear that this was a reasonable sequence. I was pretty lucky to not have damaged the engine.
Ken
I never expected stuck-open to evolve into stuck-closed, but when I took the thing out and examined it, it became clear that this was a reasonable sequence. I was pretty lucky to not have damaged the engine.
Ken
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binsinLOL (08-07-2020)
#10
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i would only worry if it climbs over 212f and stays up there. i've seen 212 and then it drops slowly keeping the same freeway speeds as the thermo opens.
but then again, now that the weather is cooler, i see it even out around 180-190 on both oil and water.
but then again, now that the weather is cooler, i see it even out around 180-190 on both oil and water.
#14
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OK. I've had several days to monitor now and the car runs pretty regularly at 178 degrees. Doesn't matter if it is city or highway. I guess my initial results were wishful thinking for trying to find a solution for the poor gas mileage. Coming to the realization that their is nothing wrong with my car, the MPG just plain and simply suck.
On a side note the Scan Gauge is pretty cool and simple to use. Provides a lot of the instrumntation Mazda should have included. Not an end all but for the money and portability pretty cool.
On a side note the Scan Gauge is pretty cool and simple to use. Provides a lot of the instrumntation Mazda should have included. Not an end all but for the money and portability pretty cool.
#18
Extraordinary Engineering
#19
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We are in the running between 32 to 5 degrees over the last several days.
#20
What pointy ears?
Normal coolant temps for me are 179-180F at ambient temps below 60F or so, at highway speeds.
More graphs from my little engine temps project can be found here, https://www.rx8club.com/series-i-tech-garage-22/engine-temps-115456/
More graphs from my little engine temps project can be found here, https://www.rx8club.com/series-i-tech-garage-22/engine-temps-115456/
#21
recently my gauges started to read 185-205F during normal street traffic when its 50F outside when it use to stay around 170ish .... should i start to worry, car temp reaches those numbers fairly quickly now even though its cold outside.... i dont think i ever saw it go that high before when its cold out, oil temp doesnt seem to be affected... is something wrong?
#23
what scares me is that i dont hear my coolant alarm until heavy traffic and when its in the 90's outside , but i hear it now when its normal driving in mid 50-60temp outside..
#25
haha oh no, i meant my prosport gauges have that feature, to do that annoying beep when your preset temps go past a certain point