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Coolant temp sensor location

24629 Views 44 Replies 9 Participants Last post by  amcmullan4444
Hi all

Looking for a kind soul to provide a picture of the locations of the 2 temp sensors on an R 5, which I propose to change as the fans stay on when the vehicle is switched on but not running - which I understand from reading around the subject is likely caused by duff sensors. If anyone knows whether changing both is necessary, and how to, that would also be appreciated.

Many thanks in advance.

Bassist
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Hi Bassist, and welcome to myTreg.com

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Hi and welcome Bassist,

I'm sure an R5 owner will be along shortly and you could well be right with your diagnosis but a quick check with VCDS could confirm or negate this if a fault code shows up. VW dealers have them, but so do some VW specialists and some friendly forum members if you post your location or have a look here:

http://www.mytreg.com/index.php?/topic/9599-vcds-vag-com-member-locator/
Hi and welcome Bassist,

I'm sure an R5 owner will be along shortly and you could well be right with your diagnosis but a quick check with VCDS could confirm or negate this if a fault code shows up. VW dealers have them, but so do some VW specialists and some friendly forum members if you post your location or have a look here:

http://www.mytreg.com/index.php?/topic/9599-vcds-vag-com-member-locator/
Hi guys - thanks for the friendly welcome, much appreciated. I will post further details on the car - which I love and is a relatively standard spec R5 - auto, jet black and c 80 k.. The issue and solution has been searched for exhaustively, by me, and, if I am able, will document the fix once I have located the sensors, at least one of which does not appear on the charts, I am told..
The coolant temperature sensor G62 is located under the inlet manifold behind the oil filter housing. The other coolant temperature sensor G83 is in the radiator outlet hose, lower drivers side.
@ Bassist - what did I tell you on CT?! Chaser's The Man!
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It seems that Mr Grumpy intervened on the CT forum - members can be a tad aggressive sometimes over the pond - I like to think we are somewhat more tolerant and helpful here


Hope you got your question answered
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Many thanks all 3. If a photo of the one on the engine is available, great. If not, bring on the yanks! -2 of you know what I mean.. All the best

Edit - sorry missed your post. Weird attitude I was going to offer a therapist this side of the pond, but resisted. Nooby directed me to civilisation.

Btw - is that guy a serial mauler, or was I his long awaited foe?
Wow a tad grumpy.. Mind you, if you think that s aggressive, just try posting a question in the Vagcom forum on the vortex without including a full scan and inside leg measurement , you get your head blown off..
Wow a tad grumpy.. Mind you, if you think that s aggressive, just try posting a question in the Vagcom forum on the vortex without including a full scan and inside leg measurement , you get your head blown off..
I was really tempted to respond in kind but day job consists of too much of that. And i figured he wasprobably like Walter from the Big Lebowski. That said, great potential source of Little Britain material ...
Btw - is that guy a serial mauler, or was I his long awaited foe?
No!

He's had a pop at several folk including me - maybe sometimes needs to take more water with whatever he's imbibing!
You did indeed - unfortunately someone was having a pop on the thread so I PM'd Bassist to join us over here.
Wow a tad grumpy.. Mind you, if you think that s aggressive, just try posting a question in the Vagcom forum on the vortex without including a full scan and inside leg measurement , you get your head blown off..
Just been on that site. See what you mean!
You did indeed - unfortunately someone was having a pop on the thread so I PM'd Bassist to join us over here.
Was after a photo hence further attempt here - as I said above, I will document the as yet undocumented fix thereafter. Hey ho.
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I'll repeat my answer here as per CT with pictures I just took for you

It uses two sensors.

Stand in front of the car looking into the engine bay. Look to the left and down towards the bottom radiator outlet. The L-shape bend that comes out has a sensor. Sensor G83
Motor vehicle Hood Automotive tire Automotive design Vehicle


Then if you look on the right between the oil cooler (heat exchanger) and the intake manifold there is a wire that comes from the head where another sensor sits. Sensor G62
Automotive lighting Light Automotive tire Hood Motor vehicle

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I'll repeat my answer here as per CT with pictures I just took for you

It uses two sensors.

Stand in front of the car looking into the engine bay. Look to the left and down towards the bottom radiator outlet. The L-shape bend that comes out has a sensor. Sensor G83
View attachment 2418

Then if you look on the right between the oil cooler (heat exchanger) and the intake manifold there is a wire that comes from the head where another sensor sits. Sensor G62
View attachment 2417
You are a gentleman. I will document the fix if I have balls to do it. Thank you.
Pics don't really help much you'll just have to search with a mirror as it's well hidden....

Both sensors supply signals to the engine ecu for comparison and can influence fan operation under certain conditions. The ecu will generally use the G62 signals for gauge reading and fan operation and the G83 for control of the electric coolant pump.









Very fiddly job. I am now qualified to put ships in bottles!
Pics don't really help much you'll just have to search with a mirror as it's well hidden....

Both sensors supply signals to the engine ecu for comparison and can influence fan operation under certain conditions. The ecu will generally use the G62 signals for gauge reading and fan operation and the G83 for control of the electric coolant pump.
Thank you also chaser. I think I have located it and it looks as if the removal of the bracket supporting the various lines will need to be necessary per your pics, following which the sensor can just about be got at - though as you say v fiddly still..... Is that right/ all that is necessary? Or is it also necessary to remove the inlet manifold?
No there's no need to remove the inlet manifold. You may want to remove that coolant pipe though.
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