We've had a few problems with our 2014 Touareg TDI.
-Water pump has been replaced
-EGR Cooler leak (this is not yet been fixed, but scheduled)
-Coolant is very dirty (hoping this is the EGR Cooler leak??)
Coolant was tough to get into the vehicle after the water pump was replaced (had to vacuum fill it).
In spite of the above, it seems to be running OK... except:
My wife drove the vehicle from cold about 5 minutes yesterday, and all of a sudden, the engine temp guage pinned to the right, and the coolant light came on.
It was a hot day, and the AC was on. (though that's not unusual for the summer)
She pulled over, opened the coolant reservoir, which started overflowing with boiling coolant. Then called me.
I drove to her, found the coolant level was a tiny bit low (due to the boil off). I let it cool, and since we were close to home I turned off the AC, turned the heater on max and drove home. The engine temp was fine the whole way home, but there was one issue: The heater did not work properly (blowing cold air), and the heater fan kept turning on and off.
So I'm assuming there was no coolant in the heater block for some reason (maybe it boiled off when it overheated? is that possible?)
I don't think it's just a bad coolant temp sensor (since coolant was actually boiling)
When I got home, I ran it for a while and finally the heater started working again. I've driven it since and it seemed to be ok. I monitored coolant temp with the scanner, and everything seemed to be ok.
No codes were tripped.
I'm thinking:
The thermostat in this vehicle seems to be a pain to replace, normally I might just replace it to see what happens, but it's a bit of a pain plus more expensive than other thermostats (surprise surprise).
Is there anything that I'm missing?
-Water pump has been replaced
-EGR Cooler leak (this is not yet been fixed, but scheduled)
-Coolant is very dirty (hoping this is the EGR Cooler leak??)
Coolant was tough to get into the vehicle after the water pump was replaced (had to vacuum fill it).
In spite of the above, it seems to be running OK... except:
My wife drove the vehicle from cold about 5 minutes yesterday, and all of a sudden, the engine temp guage pinned to the right, and the coolant light came on.
It was a hot day, and the AC was on. (though that's not unusual for the summer)
She pulled over, opened the coolant reservoir, which started overflowing with boiling coolant. Then called me.
I drove to her, found the coolant level was a tiny bit low (due to the boil off). I let it cool, and since we were close to home I turned off the AC, turned the heater on max and drove home. The engine temp was fine the whole way home, but there was one issue: The heater did not work properly (blowing cold air), and the heater fan kept turning on and off.
So I'm assuming there was no coolant in the heater block for some reason (maybe it boiled off when it overheated? is that possible?)
I don't think it's just a bad coolant temp sensor (since coolant was actually boiling)
When I got home, I ran it for a while and finally the heater started working again. I've driven it since and it seemed to be ok. I monitored coolant temp with the scanner, and everything seemed to be ok.
No codes were tripped.
I'm thinking:
- Cruddy coolant plugged something up or messed up the thermostat
- AC compressor is bad or AC plugged and causing overheating issues
- Coolant still not completely filling it and air pockets are there (though I don't know how I would check this?)
The thermostat in this vehicle seems to be a pain to replace, normally I might just replace it to see what happens, but it's a bit of a pain plus more expensive than other thermostats (surprise surprise).
Is there anything that I'm missing?
