coolant overflowing expansion tank
11-26-2017, 05:41 AM
#1
coolant overflowing expansion tank
03 S2000 213,000 miles, I removed and cleaned the throttle body, installed a new gasket all lines are connected correctly, now at driving speeds, does not do it just idling, coolant is leaking from the expansion tank, did not do it until I installed a new gasket
11-26-2017, 10:40 AM
#2
Any signs of the engine overheating?
Thanks!
Thanks!
11-26-2017, 11:06 AM
#4
Yup. Keep in mind that they need to be modified if you have a Koyo (sand down the portion that goes through the inside of the coolant neck on I think it's the B fitting). I love that funnel.
11-26-2017, 12:41 PM
#5
no overheating was not aware of bleeding the cooling system have driven the car some and have added coolant but temp guage never above normal will sit an idle for an hour and not do any thing wrong
11-27-2017, 08:02 AM
#6
I wouldn't drive the car until the system is bled...air pockets will give you a false on the temp gauge
11-27-2017, 09:43 AM
#7
This. The temp gauge reads coolant temp. If there is not enough coolant, the temp sensor isn't fully immersed in coolant, so it doesn't get a good reading.
Imagine the scenario where coolant is very low, and therefore its way hotter than it should be. Since its low the temp sensor is not touching the boiling hot coolant. Instead its just reading the heat of the metal where its installed, however much of that heat permeates through the thread sealant on the sensor.
In this scenario engine is overheating badly, yet temp reads normal or even reads low.
Here is an easy way to sanity check temp sensor. Turn heat up full blast. How hot is the air coming out of vents? (When temp gauge reads engine is warmwd up) If its not so hot its almost hurting your fingers, then its not giving you a good reading. Shut down engine immediately.
Imagine the scenario where coolant is very low, and therefore its way hotter than it should be. Since its low the temp sensor is not touching the boiling hot coolant. Instead its just reading the heat of the metal where its installed, however much of that heat permeates through the thread sealant on the sensor.
In this scenario engine is overheating badly, yet temp reads normal or even reads low.
Here is an easy way to sanity check temp sensor. Turn heat up full blast. How hot is the air coming out of vents? (When temp gauge reads engine is warmwd up) If its not so hot its almost hurting your fingers, then its not giving you a good reading. Shut down engine immediately.
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11-27-2017, 10:14 AM
#8
This. The temp gauge reads coolant temp. If there is not enough coolant, the temp sensor isn't fully immersed in coolant, so it doesn't get a good reading.
Imagine the scenario where coolant is very low, and therefore its way hotter than it should be. Since its low the temp sensor is not touching the boiling hot coolant. Instead its just reading the heat of the metal where its installed, however much of that heat permeates through the thread sealant on the sensor.
In this scenario engine is overheating badly, yet temp reads normal or even reads low.
Here is an easy way to sanity check temp sensor. Turn heat up full blast. How hot is the air coming out of vents? (When temp gauge reads engine is warmwd up) If its not so hot its almost hurting your fingers, then its not giving you a good reading. Shut down engine immediately.
Imagine the scenario where coolant is very low, and therefore its way hotter than it should be. Since its low the temp sensor is not touching the boiling hot coolant. Instead its just reading the heat of the metal where its installed, however much of that heat permeates through the thread sealant on the sensor.
In this scenario engine is overheating badly, yet temp reads normal or even reads low.
Here is an easy way to sanity check temp sensor. Turn heat up full blast. How hot is the air coming out of vents? (When temp gauge reads engine is warmwd up) If its not so hot its almost hurting your fingers, then its not giving you a good reading. Shut down engine immediately.
Good luck!
11-27-2017, 10:32 AM
#10
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