GTI running too cool?

[h100vw]

Hi Gav, yes I am still running the Pink coolant. Sorry for the noob question, what's the VCDS and how do I compare the ECU input on the dash?

Should the car sit at the optimal 90C even when it's cold outside or is it normal that it's sitting at 70C given the fact that the air would be a contributing factor?

Thanks mate

LOL you need to get with the program! VCDS is the one thing you need in your life after buying a VW.

It's a diagnostic lead and software that allows you to look at the fault codes in controllers in your car. So you can look at live data in the ECU and the instruments and see if they agree or not.

The needle movement is damped to a degree so that it shows 90 unless there's a big drama coming. Once to temp, either airflow from driving or the fans will keep the temp steady.

Outside temps on a cold day would mean the thermostat would restrict flow a little to get more heat in the coolant and open up more on a hot day to increase flow.

Gavin

[Swainey32]

Sounds like I have the same issue as well, I just assumed cold weather meant cold everything haha
Where should I buy a thermostat for my mk4 Gav?

[nat225]

Answers (well almost) to all modern VW Audi cars

Ross-Tech: Home

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[h100vw]

Sounds like I have the same issue as well, I just assumed cold weather meant cold everything haha
Where should I buy a thermostat for my mk4 Gav?

The stat should regulate the temp all year round, the gauge shouldn't move unless something is broken.

So if you aren't getting to temp then it's likely a problem. If it's over heating, a broken water pump would be on my investigation list.

Gavin

Ref your PM, I had forgotten too #airhead

[Swainey32]

The stat should regulate the temp all year round, the gauge shouldn't move unless something is broken.

So if you aren't getting to temp then it's likely a problem. If it's over heating, a broken water pump would be on my investigation list.

Gavin

Ref your PM, I had forgotten too #airhead

Ok definitely need one, it never gets to 90 anymore, max 70ish. Will track one down.

Haha ok good, that makes me less worried, I was thinking oh no I hope he isnt waiting and getting angry with me haha

[louis19]

Can anyone recommend a good place to buy one and what sort of price I'm looking at for a replacment. Just to clarify, on a cold night or morning (around 10-12 celcius) the car should still be sitting at 90C? It seems like sitting on 70C when driving with the air temps being that low and passing thought the engine bay and cooling the engine would be normal or am I way off?

[Swainey32]

found heaps on ebay from uk for cheap

[h100vw]

Can anyone recommend a good place to buy one and what sort of price I'm looking at for a replacment. Just to clarify, on a cold night or morning (around 10-12 celcius) the car should still be sitting at 90C? It seems like sitting on 70C when driving with the air temps being that low and passing thought the engine bay and cooling the engine would be normal or am I way off?

Should always be 90 degrees. The stat regulates the flow to make this happen. If the water gets hot, it opens prompting flow through the radiator and getting it cooled more and vice versa.

Gavin

[louis19]

Should always be 90 degrees. The stat regulates the flow to make this happen. If the water gets hot, it opens prompting flow through the radiator and getting it cooled more and vice versa.

Gavin

Awesome thanks for the info mate! Looks like its time to replace the stat then. Anyone know where I can find a DIY tutorial to do this? Would VW stock the thermostat?

[h100vw]

Awesome thanks for the info mate! Looks like its time to replace the stat then. Anyone know where I can find a DIY tutorial to do this? Would VW stock the thermostat?

They would, be pricey from there though. Have a look around the internet first.

Gavin

[louis19]

Is one like this suitable? Or is there a particular make or brand that is good to try and go for.
Other then the thermostat itself is the only other thing I will need is coolant mixture?

Facet Thermostat Volkswagen Polo 1 8 GTI 2001 2009 | eBay

Thanks!

[h100vw]

Is one like this suitable? Or is there a particular make or brand that is good to try and go for.
Other then the thermostat itself is the only other thing I will need is coolant mixture?

Facet Thermostat Volkswagen Polo 1 8 GTI 2001 2009 | eBay

Thanks!

I consider that pricey but it is the right one. Note what I said to Stuwey early on about the plastic housing it sits behind.

Gavin

[louis19]

What would you consider a good price? Searching everywhere I can find, and the one I linked above is about the standard price on eBay, there's others cheaper internationally but are charging the remaining difference in postage so it's effectively the same price. On top of the thermostat I'm going to need new coolant correct? And if possible, an extra plastic casing? Any ideas what the casing is actually called so I can try and find one?


Thanks!

[h100vw]

What would you consider a good price? Searching everywhere I can find, and the one I linked above is about the standard price on eBay, there's others cheaper internationally but are charging the remaining difference in postage so it's effectively the same price. On top of the thermostat I'm going to need new coolant correct? And if possible, an extra plastic casing? Any ideas what the casing is actually called so I can try and find one?


Thanks!

FOR Audi VW Jetta 4 Cylinder 1 8 2 0 Thermostat Housing Cover Water Outlet Pipe | eBay

I have one at home. Just when you are battling with it, there's a slight danger of breaking it. Usually on a Saturday afternoon. No need to buy one every time, if you break yours, you can have mine and replace it.

Thermostat 87C VW Golf Beetle Jetta Passat Audi A4 TT | eBay

vw golf thermostat | eBay

You could reuse the coolant and just top up what you lose. I find the problem with old coolant is how to dispose of it.

Warm the engine and drop it out of the radiator drain on the passenger side. Use some G12.

Gavin

[louis19]

FOR Audi VW Jetta 4 Cylinder 1 8 2 0 Thermostat Housing Cover Water Outlet Pipe | eBay

I have one at home. Just when you are battling with it, there's a slight danger of breaking it. Usually on a Saturday afternoon. No need to buy one every time, if you break yours, you can have mine and replace it.

Thermostat 87C VW Golf Beetle Jetta Passat Audi A4 TT | eBay

vw golf thermostat | eBay

You could reuse the coolant and just top up what you lose. I find the problem with old coolant is how to dispose of it.

Warm the engine and drop it out of the radiator drain on the passenger side. Use some G12.

Gavin

Awesome thanks for the links and info Gav!