18 hours ago, ApertureS said:

Not at all. The mit silikat bag is the old part number and it supersedes to a new one without the silikat bag. That in no way voids any warranty.

The person above is being taken for a ride by the dealer that doesnt know what theyre talking about (no surprise there)

All of which may be so, but having had my turbo fail a few months earlier on my previous vRS, of which a fault in the cooling system may have very well been a factor, I chose not to give VW any additional wriggle room on the manufacturers warranty and left the bag in place, on their say so, until said warranty expired.

 

Gaz

 

 

Edited 25 November, 20232 yr by Gaz
Typo

20 hours ago, BillyParker said:

Having heard of the horrors stories about these bags bursting, I replaced my header tank with a new one, with no bag. I have paid for a 2 year warranty, recovery, 2 services and MOTs. Could they refuse to honour this because I changed the header tank.

 

I agree with @ApertureS and wouldn't expect your warranty to be affected.  The header tank could have been changed at any point.  My case was a little different, in that my car was, at the time, still under the three year Manufacturer's warranty.  Having had a particularly bad experience previously with my vRS, when the VW main dealer, who was servicing and looking after my GTI (and would have been my first point of contact  with any warranty claims) told me not to remove the silikat bag, I decided to err on the side of caution and heed their advice.

 

Gaz

On 22/11/2023 at 11:17, J.R. said:

But do the double walled ones need replacing at all?
 

I thought the whole purpose of them was so that the crystals could never make their way into the main coolant circuit, there being a sort of sieve screen as the partition and the crystals being loose and not in a bag.

 

I cant work out what my, vehicle has, it does not have Mit Silkat marked on it I cant work out if it is double wall but its very opaque, there is no tea bag visible, however I mistakenly run the vehicle for 18 months with just tap water as coolant, at the end it came out clear enough to drink so I believe the system has Silkat in it as that is its raison d'être, to protect against corrosion if correct coolant is absent.

Yes… but it was only just starting to show the tiniest bit of damage at over 100k miles and 5 years old.

Could you please expand on that?

 

It doesn't leave me any the wiser, what was the damage and what was the reason for replacing?

 

The first question probably answers the second one.

 

Thanks in advance!