All Things Mk5 > How to Guides / Troubleshooting
Coolant temp
chris s:
Well, finally got around to changing the Coolant Temp Sensor [OEM from VW] yesterday and I was watching the temp gauge like a hawk during my 30min drive into the office this morning. The main difference I noticed was that that it took much longer to warm up and actually only got to 90 degrees when stuck in traffic in after about 20miles. For the majority of the drive it hovered between 75 and 85 degrees. From having read as much as Google will provide it does look like its the Thermostat at fault and not the sensor. Bit a pain as the sensor, O-Ring and Coolant set me back about £55.
Does anyone have any experience of changing the Thermostat, I believe its not a job for the faint hearted so would prefer to get a garage to do the job... and I was wondering how much it costs?
v4rley:
I had coolant tempature issues, have you checked / know about the inline thermostats? I change these first but made little difference so changed the main one, think it was roughly £35 for the part from vw.
I managed to change myself, it's just a bit fiddly and time consuming. I just took my time and wasn't to bad. Fixed my problem and always feel great at the end of a successful DIY! There are a few thread about on here with great in-depth info
chris s:
Cheers - I'm more than happy to try DIY, but it's the thought of taking my car our of action, and with a young family and having a 40m commute I'd be knackered if I messed it up.
I've read about the inline stats as well and could try them, but it seems they are not the problem if the temp fluctuates, they are usually the cause of a slow rising temperature
v4rley:
Yeah that's the only issue with DIY'ing. I'm fortunate that I got a spare car and worst case 1/2mile from vw dealship :laugh:
Best going with the main stat then you know it's sorted and eliminated from the diagnostic process!
chris s:
Well after my disappointment with the temp sensor I've scanned my car this evening and no faults came up, so does this mean I can discount the main thermostat as being faulty?
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