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Author Topic: Coolant Temp  (Read 5151 times)

Offline Ranbeer Singh

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Coolant Temp
« on: December 20, 2013, 04:39:18 pm »
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
« Last Edit: December 20, 2013, 05:09:53 pm by Ranbeer Singh »
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Offline Llew

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Re: Oil Temp
« Reply #1 on: December 20, 2013, 04:50:23 pm »
Oil or coolant?
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Offline edd666999

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Re: Oil Temp
« Reply #2 on: December 20, 2013, 04:51:30 pm »
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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Offline Llew

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Re: Oil Temp
« Reply #3 on: December 20, 2013, 04:54:55 pm »
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Offline Ranbeer Singh

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Re: Oil Temp
« Reply #4 on: December 20, 2013, 05:09:34 pm »
Sorry its the coolant temperature next to the petrol gauge.
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Offline Human Joist

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Re: Coolant Temp
« Reply #5 on: December 20, 2013, 07:07:12 pm »
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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Offline Ranbeer Singh

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Re: Coolant Temp
« Reply #6 on: December 20, 2013, 08:20:47 pm »
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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Offline Human Joist

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Re: Coolant Temp
« Reply #7 on: December 20, 2013, 11:03:53 pm »
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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Offline vag12

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Re: Coolant Temp
« Reply #8 on: December 20, 2013, 11:07:07 pm »
Change thermostat job done i know this fault very well
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Offline Chris01

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Re: Coolant Temp
« Reply #9 on: December 21, 2013, 10:56:52 pm »
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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Offline jamma

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Re: Coolant Temp
« Reply #10 on: December 27, 2013, 07:42:31 am »
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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Offline Itguy

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Re: Coolant Temp
« Reply #11 on: December 27, 2013, 07:58:56 am »
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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Offline Wolf Burger

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Re: Coolant Temp
« Reply #12 on: December 27, 2013, 06:47:24 pm »
Whats the part number for the main thermostat?

06F121111F ??
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Offline Human Joist

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Re: Coolant Temp
« Reply #13 on: December 27, 2013, 07:24:58 pm »
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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Offline kylelnsn

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Re: Coolant Temp
« Reply #14 on: December 27, 2013, 07:30:01 pm »
Quote from: Ranbeer Singh on December 20, 2013, 08:20:47 pm
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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