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Mk3 dsg VRs boiling coolant Help!!!

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Hi there I’m new to Briskoda and also fairly new owening a Skoda ( starting to regret ) since owning my car I have had a few problems

Dpf blocked

Now a big coolant issue

cars on 150000 miles

Car was fine untill I had a pipe fail behind drivers side front wheel since this day the car can’t seem to keep coolant in the system. Car has been bled threw by a Skoda Audi specialist had a water pump changed as I was told this was causing this and now also a heater matrix again the problem is coming back is there anyone who knows these cars inside out who can help. I’m loosing my mind trying to get answers

Hello, welcome to the forum.

Please can you be more specific on what (I assume coolant) pipe caused the original issue?

Is your vehicle Left or Right hand drive?

I'm not aware of any coolant piping out in the wheel arches.

  • Author

Hi there ofcorse. There is a small right elbow pipe with a one way valve in and it’s a Uk spec right hand drive

Can you post a picture of pipe showing its location?

Has a test been done on the coolant for possible head gasket leak?

  • Author

hi there I will do and the garage it’s in have said it’s not the head gasket as passed all tests

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  • Author

Update the garage ( Audi vw Skoda ) specialist still can’t seem to find issue

Hi Tankessex,

Welcome to the forum and hopefully some of the people on here can help guide you, there's a wealth of experience on here.

Is the car a diesel or petrol and what size engine and hp ? How long have you had the car and has it been properly serviced ?

The VW engines around the time yours were built have a know issue with the coolant system where there is a small bag of silica crystals in the header tank to slowly release silicates into the coolant but they have a habit of splitting and clogging up the heater matrix. The header tank has the dreaded words "mit silikat" printed on it and there is chance that that may have split. To check, you tend to lose heating on the passenger side first due to a blocked matrix so often shows up in winter when hearing is used.

As for losing coolant, there are various hoses which can leak as well as the water pump. Another thing to check is the header tank and cap... if these are not sealed then the system is not under pressure and means the coolant boils at a lower temp than it should . A new tank ( without a silica bag along with a new cap is around £60 as a genuine part , or less as a copy part).

Hope you get it sorted and im sure someone will be along soon with an encyclopedia knowledge of the coolant sytem once they know the engine type you have.

Out of interest was it a vw main dealer or an independent you took it too ?

Cheers

Edited by 3rdoctavia

  • Author

Hi there

It’s had a replacement bottle bag not split

It’s also been flushed

New water pump

New heater matrix

It’s a 2.0 VRs tdi believe the cun engine

It has gone to a independent specialist

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