MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Ranbeer Singh on December 20, 2013, 04:39:18 pm
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Hi All,
My oil temp doesnt seem to be hitting 90 as it used to. I appreciate the weather is cold but normally it would hit 90 in 5/10 mins of driving... currently at the end of my journey to work which is about 20 mins, it is hovering around the 80 mark. Im guessing the thermostat might need changing?? Also is this damaging to the car... any advice would be most welcome.
Thanks in advance.
Rick
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Oil or coolant?
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There have been some big threads on the thermostat in the past month.
Do a search there's loads of info on exactly your issue.
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http://www.mk5golfgti.co.uk/forum/index.php/topic,35900.0.html
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Sorry its the coolant temperature next to the petrol gauge.
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You have described the common diagnosis of the main thermostat failing mate. Also if it is the main thermostat they tend to get nearly to temp when stationary at a set of lights or traffic etc and then when you drive off the temp drops.
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This is why I love this forum ! :happy2:
Good solid advice!
Will this cause damage to the car if not replaced straight away?
Rick
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Not directly. However the engine is more prone to wear whilst cold which is why you should never thrash it while cold and yours will take longer to get warm also mpg is worse when cold. There are 2 other minor thermostats on a dsg and 1 on a manual. They fail and stick open and the symptom is the car just takes ages to get warm but holds the 90 when it's there. I have this fault and will be replacing it next month.
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Change thermostat job done i know this fault very well
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Just to confirm this, a friend has had the exact same issue. At traffic lights the idle revs were higher than usual to compensate for the "cold" engine. MPG went south. It was all good after changing the thermostat.
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Hi . I have the same problem , mine sticks at 70 degrees , any idea how much part is and how long to fit ? Cheers
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Part is about £35 (if it is actually the main thermostat housing you need, rather than any of the other thermostats your car may have).
Changing main thermostat is about a 3-4hr job DIY depending on how good you are with the spanners and if you have all the right kit.
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Whats the part number for the main thermostat?
06F121111F ??
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On an early gti. 2005 model. Do I have to drain the coolant in order to change the main thermostat. I know I do for the smaller ones. Just wanted to confirm for the main
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This is why I love this forum ! :happy2:
Good solid advice!
Will this cause damage to the car if not replaced straight away?
Rick
Here Here! :drinking:
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On an early gti. 2005 model. Do I have to drain the coolant in order to change the main thermostat. I know I do for the smaller ones. Just wanted to confirm for the main
Yes you do
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Cheers bud
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It's obvious when you get in there but the thermostat is on the side of the engine block about half way down, probably in the worst position possible for DIY!
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Am hoping I don't need to change that one. My car holds 90 when it gets there but it takes nearly 10 miles to do so. I was thinking it's the two smaller thermostats that have failed.
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Part is about £35 (if it is actually the main thermostat housing you need, rather than any of the other thermostats your car may have).
Changing main thermostat is about a 3-4hr job DIY depending on how good you are with the spanners and if you have all the right kit.
Cheers , I need the cambelt done too, so cambelt, water pump and thermostat is 480 quid so will get it all done at once.
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Update.
Changed the main thermostat and car is back to normal :driver:
Thanks chaps
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Update.
Changed the main thermostat and car is back to normal :driver:
Thanks chaps
Mine being done in the next couple of weeks.
How long and how much mate?
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VW Book Time is 3hrs.
DIY time seems to be 3-4hrs depending on skill, access etc - there is probably someone out there who has done it quicker though!
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Mine being done in the next couple of weeks.
How long and how much mate?
HI Mate,
Got my mechanic to do it.
3hrs work
£80.00 labour
£30.00 thermostat
£5.00 coolant
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£115.00 all in
cheers
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Right update. Drained the coolant and found a good place to do so of a link On here by removing a pipe on a low point and letting it all come out neatly. Did not bother with any proper drainage points. Then replaced both smaller thermostats. Both were completely knackered and I could not even move them with pliars. The only trouble I had was the clips were the wrong way round so could not get straight on to the spring part. Sorted filled back up and back on the road. Just want a cold star to check it's sorted.