Temp gauge acting up or T'stat sticking
#1
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Temp gauge acting up or T'stat sticking
Replaced the thermostat and the engine coolant temp sensor.
I did the ECT first. After it was done, the temp guage started acting like the t'stat was sticking, so I just got finished replacing the t'stat.
Bleed the system of air and took it for a spirited run. The temp gauge rose to the "12 o'clock" position just like it used to, but after a couple of minutes of unobstructed airflow, it dropped down to just below the second notch.
I did the ECT first. After it was done, the temp guage started acting like the t'stat was sticking, so I just got finished replacing the t'stat.
Bleed the system of air and took it for a spirited run. The temp gauge rose to the "12 o'clock" position just like it used to, but after a couple of minutes of unobstructed airflow, it dropped down to just below the second notch.
#2
likely the T-stat, but may also be the temprature sensor
I have had a similar problem. I have replaced the T-stat first. The problem was fixed. But it began once again a month or two later, and I have replaced the temperature sensor. The problem never come back since.
I would suggest you to drive a few weeks before doing anything. If the temperature needle rarely arrive at the 12 o'clock position, and stably remain at a lower position, replace the T-stat first. If the temperature needle arrives at the 12 o'clock positioon and then (maybe after a few hours, maybe after a few minutes, not predictable) drop to almost 9 o'clock, replace the temperature sensor first.
If the temperature is lower on high way than local driving, it's most likely a problem of the T-stat.
I would suggest you to drive a few weeks before doing anything. If the temperature needle rarely arrive at the 12 o'clock position, and stably remain at a lower position, replace the T-stat first. If the temperature needle arrives at the 12 o'clock positioon and then (maybe after a few hours, maybe after a few minutes, not predictable) drop to almost 9 o'clock, replace the temperature sensor first.
If the temperature is lower on high way than local driving, it's most likely a problem of the T-stat.
#4
is there a procedure for changing the stat?
ie part number and what other parts are needed ie the gasket or oring or whatever.
I have been told that the stat is on the lower portion of the hoses.
ie part number and what other parts are needed ie the gasket or oring or whatever.
I have been told that the stat is on the lower portion of the hoses.
#6
I was havign some similar problems and it turned out to be dirty contacts on the temperature sensor on the radiator. This sensor is located (on the 1.8t) on the drivers side about 4" from the bottom of the radiator.
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