Galaxy 1.9 Tdi Mk2 115bhp Where Is The Thermostat?

[richardman101]

i have spent ages looking at posts on here trying to find one relating to where the thermostat is on this galaxy tdi, its an x reg early mk2, tdi (pd) 115.

 

the mk1 galaxy tdi i owned previously had the stat on the front lower left side of the engine, with a plastic housing containing the stat, which joined to the rad bottom hose. this one must be somewhere different.

 

could anyone point me in the right direction please? thankyou very much! :wacko:

[chrispb123456]

The way you are decribing it is exactly where it is.

[richardman101]

The way you are decribing it is exactly where it is.

i think i had better have another look! perhaps it is hidden somehow. thanks for the reply, appreciated!

[SilverBeast]

The way you are decribing it is exactly where it is.

i think i had better have another look! perhaps it is hidden somehow. thanks for the reply, appreciated!

 

It is well hidden, you can't see it from the front of the car without removing several components. I managed to reach it just by removing the tray above the engine, beneath the wiper assembly.

 

Here is another picture of it on my 2005 MkII TDI 130. This is taken 'blind' until I got a good shot, from the bulkhead looking towards the front of the car with the Fuel Filter and tray under the wiper assembly removed. It is beneath the hose that goes straight into the back of the fitting fastened to the righthand side of the cylinder head

 

 

and with the plug disconnected

 

 

And here is how I worked on it

 

 

The camera is attached to a laptop so I can see what I'm doing on the Webcam.

 

 

The black thing behind the camera is a torch for illumination. Just above the camera is the run on pump.

[richardman101]

thankyou for that - i do indeed need to change the temperature sensor in the galaxy as i have the 'over revving' at cold startup, your pictures make it look far easier than i had expected it to be! my original post though, was enquiring as to the whereabouts of the thermostat!! ;-)

[SilverBeast]

thankyou for that - i do indeed need to change the temperature sensor in the galaxy as i have the 'over revving' at cold startup, your pictures make it look far easier than i had expected it to be! my original post though, was enquiring as to the whereabouts of the thermostat!! ;-)

 

So you did. How embarassing :wacko: Must be old age, and the fact that mine isn't heating up fully so I suspect my thermostat but am also trying to figure out if my Temp Sensor fault in VAG-COM is because of the Temp sensor (which I didn't change despite the photos, as it is a lot harder to get at than it looks from the photos) or the wiring. Another thread, in the FAQ's I believe, suggests removing the engine tray and working from below for this.

 

Try again.

 

From the TIS CD

 

1. Drain the cooling system.

 

2. Remove the engine cover.

 

3. Remove the Thermostat housing retaining bolts, allowing the coolant to drain into a suitable container

 

 

4. Detach the Thermostat Housing from the retaining clip

 

 

6. Rotate the thermostat counterclockwise and remove the thermostat

 

 

Replace the O ring seal when refitting

[chrispb123456]

thankyou for that - i do indeed need to change the temperature sensor in the galaxy as i have the 'over revving' at cold startup, your pictures make it look far easier than i had expected it to be! my original post though, was enquiring as to the whereabouts of the thermostat!! ;-)

The pictures above for the temp sensor are for the 130 engine which will be quite different to your 115 your sensor is fitted straight in the cylinder head.

 

The TIS pics for the stat housing gives you the area just below left of the vacuum reservoir, 2 bolts hold it in, iirc the left one is a bit fiddly.

[richardman101]

thanks chrispb - is it located on the front lower left of the engine, looking from the front, which is where i found the stat on my old mk1?

[richardman101]

thankyou again silverbeast for taking the time to look up this info, i dont think the 130 has the stat in the same place as the 115 but all knowledge is valuable so i am grateful just the same - you never know i may be able to afford a 130 one of these days! good luck with your temp sensor if you choose to change it, i found the instructions for doing this from under the car in the forum, it appears it will be a bit of a pig whichever way it is attempted but the rewards will hopefully make it worth the damaged knuckles etc!! :wacko:

[SilverBeast]

thankyou again silverbeast for taking the time to look up this info, i dont think the 130 has the stat in the same place as the 115 but all knowledge is valuable so i am grateful just the same - you never know i may be able to afford a 130 one of these days! good luck with your temp sensor if you choose to change it, i found the instructions for doing this from under the car in the forum, it appears it will be a bit of a pig whichever way it is attempted but the rewards will hopefully make it worth the damaged knuckles etc!! :unsure:

 

Taken from TIS disassmbly of 115PS engine

 

 

Is this the correct one Chris?

[chrispb123456]

thankyou again silverbeast for taking the time to look up this info, i dont think the 130 has the stat in the same place as the 115 but all knowledge is valuable so i am grateful just the same - you never know i may be able to afford a 130 one of these days! good luck with your temp sensor if you choose to change it, i found the instructions for doing this from under the car in the forum, it appears it will be a bit of a pig whichever way it is attempted but the rewards will hopefully make it worth the damaged knuckles etc!! :unsure:

 

Taken from TIS disassmbly of 115PS engine

 

 

Is this the correct one Chris?

Hi Silverbeast

 

Yes that looks about right but when the alternator and aircon pump are in place makes removal of the left lower bolt more difficult

[james2038]

Richardman,

I'll be interested to hear how you get on with the thermostat replacement and whether you need to remove the alternator to get access to the bolts (it looked that way to me).

 

I planned to change my thermostat last weekend but decided to postpone after seeing the tight access to the bolts.

 

It didn't help that I initially made a wrong assumption that the 'stat was located in the housing where the top radiator hose attaches to the cylinder head (RHS as looking at engine). After removing the housing I found it was empty :unsure: Still, with the housing off, it made the coolant temp sensor change much easier :)

 

BTW, this is my first post so thanks to all contributors to this great forum - I've been a reader for some time but having now purchased an '02 115BHP Ghia I expect to become a more active member.

[chrispb123456]

You need a quarter drive socket set with universal joint and a 10mm socket to fit the bolts that way you don't need to touch the alternator.

[richardman101]

hopefully i will have a go at it within the next week or two so will post my findings on difficulty on here - the one i changed last year on my mk1 tdi wasnt too bad, i think it was all done inside an hour, but there were two parts to the plastic stat housing, one with the stat in which attached to the engine block, and the other attached to the rad pipe and it leaked continually from the push-together union between the two plastic parts afterwards despite both housings being replaced with new ones. ended up having to add a bottle of miracle cure (k-seal) to the coolant to stop the leak. you were not too far wrong looking in the pipe unions at the top of the engine for the thermostat, the 2.3 petrol models have theirs in there, nice and easy to get too but you have to buy the whole plastic housing with the stat built in, i couldnt find one available seperately when i changed one in my 2.3 si a few years ago, and i had to buy it from ford. the tdi stat is available on its own but i thought it best to change the housing aswell as it has the seal built in to it, didnt fancy doing the job twice if it didnt seal onto the block properly!