47 minutes ago, varaderoguy said:

I know folk may not keep their cars for more than 5 years from when they do the tank change - but it is important to tell the dealer/trader that you sell your car to - that the coolant silica bag has been removed.  VW/Skoda's records will still have lifetime coolant in it.  The alternative is to ask your local Skoda Dealer or VW Specialist to put a note into your car VIN's details - that coolant will need to be changed after 5 years.

 

It is also a good point for new owners to check whether the bag is physically present in any MIT SILICA tank.

@NikTheGeek This is a good point - whether VW Group have continued their installing the Silica Teabags in new Skodas (from 2020 onwards).  Agreed that all owners of MK3 Octavias also need to check too.

But if you have a tdi, and follow the much debated cambelt and water pump interval at every five years from first date of registration the coolant gets drained in that procedure. So it should not matter. That does I suppose mean the next owner needs to know if the cambelt was done at the correct age. Just a thought. 

Edited 8 February, 20215 yr by paulski

just wondering if vag have changed things, photos below of the coolant tank in my caddy van 2019, there's no tea bag but there's 2 cylinders in there.

 

 

 

Its a "New variant" 

On 08/12/2020 at 19:47, James@RRG_Skoda_Rochdale said:

I'm not condoning the removal of the silicate bag on your Skodas but the first thing I did when I got my Leon was remove it.

 

That's speaking as someone who deals with the consequences of them failing on a fairly regular basis.

has the silicate bag been replaced with the 2 cylinders like in the photo i posted above, if so, maybe vag will sell you the cylinders. coolant would then  still be for life and not every 5 years.

43 minutes ago, 310golfr said:

just wondering if vag have changed things, photos below of the coolant tank in my caddy van 2019, there's no tea bag but there's 2 cylinders in there.

 

 

 

That was used in a tt I think and they can be replaced too. You could buy the parts to change the two cylinders.

 

It’s not new, but old, possibly the original design.

Edited 25 February, 20215 yr by cheezemonkhai

20 minutes ago, cheezemonkhai said:

That was used in a tt I think and they can be replaced too. You could buy the parts to change the two cylinders.

 

It’s not new, but old, possibly the original design.

a bit strange , the cylinders being replaced by a teabag, seems like a backward step to me ,bags are more likely to burst, like we are seeing

49 minutes ago, 310golfr said:

a bit strange , the cylinders being replaced by a teabag, seems like a backward step to me ,bags are more likely to burst, like we are seeing

your view on that will probably depend on if you’re an engineer or accountant...

Only just seen this thread. I had my timing belt done yesterday by a local VAG specialist as well as doing the usual they suggested changing the water bottle because of the bag, so it's obviously a known thing.

10 hours ago, 310golfr said:

just wondering if vag have changed things, photos below of the coolant tank in my caddy van 2019, there's no tea bag but there's 2 cylinders in there.

 

 

 

 

 

What's the (full) part number of that expansion tank? Looks like it's moulded into the plastic of the outside of the bottom, so may take a phonecam picture to see.

Can see 1K0 121 407 backwards through the plastic in your first photo (I think), but not what letter follows the 7.

And is there a part number on the cylinders (assuming they come out as easily as it appears)?

 

I would've thought that a cooling system with any type of containers of 'future blockage creator' material was a backward step, but they must be having to counteract some other 'new' problem that's been designed in, I reckon.

Edited 26 February, 20215 yr by Wino

The oldest design I saw had two cylinders which pressed into clips on the bottom of the tank.
 

Come some defined point or if they ran out they could be removed and replaced with new ones.

 

Odd that that tank pictures states g12 not g12+/++ etc though.

Scooting through erwin yesterday - I noticed there is a TPI associated with the TDI engines that I have - and what to do if your matrix gets blocked.  It didn't mention any warranty reclaims, but did show the technician how to clean out the system.

I went onto erwin this AM, but suprisingly, they are doing an outage for 48hrs, so my scheduled fee for access would have run out by then :-(

48 minutes ago, cheezemonkhai said:

The oldest design

From when, approx?

It was a tank from the most powerful engine in a mk1 or the earliest mk 2 tt I think.

 

I remember coming across the diagrams when investigating mine, looking at the tank as an option and being told by a dealer it wasn’t worth it. They showed one in an old tt.

 

At a guess I would say between 2008 and 2014, but I sadly can’t remember exact dates.

 

 

Edited 26 February, 20215 yr by cheezemonkhai

2 hours ago, Wino said:

 

 

What's the (full) part number of that expansion tank? Looks like it's moulded into the plastic of the outside of the bottom, so may take a phonecam picture to see.

Can see 1K0 121 407 backwards through the plastic in your first photo (I think), but not what letter follows the 7.

And is there a part number on the cylinders (assuming they come out as easily as it appears)?

 

I would've thought that a cooling system with any type of containers of 'future blockage creator' material was a backward step, but they must be having to counteract some other 'new' problem that's been designed in, I reckon.

1ko 121 407 A is the tank number

done a bit of googling and the part no for the cylinders is  4eo 121 176  they call them silicate cartridges, about £12 - £14 at the stealers.

 

^ Good man, thanks. 

That third character of the cartridges must be a zero rather than a letter O I think, same with tank part number. 

Are cars coming from the factory with a revised tank... no bag or cartridges? Do they get an altered service schedule to include a coolant change?

53 minutes ago, Alan_P said:

Are cars coming from the factory with a revised tank... no bag or cartridges? Do they get an altered service schedule to include a coolant change?

 

Yes, there is no bag in the latest tank model and most of the cars produced 2019 and later have that tank model.

The service schedule is the same - every 5 years or 120/150k miles depending on the country, but the coolant type is different. Before when the bag exists in the tank the coolant was G13, after that it’s G12Evo.

8 minutes ago, fr1nklyn said:

Yes, there is no bag in the latest tank model and most of the cars produced 2019 and later have that tank model.

The service schedule is the same - every 5 years or 120/150k miles depending on the country, but the coolant type is different. Before when the bag exists in the tank the coolant was G13, after that it’s G12Evo.

From what I read, coolant change is not on the service schedule... in the UK anyway. It’s a lifetime item because of the bag/cartridge.

G12evo doesn’t appear to have lifetime silica either so I just wonder if it’s an oversight or the schedule includes a coolant change now.

@Alan_P That’s what my local dealer told me. I guess that each of them has it’s own opinion.. I wanted to buy G13 when I changed my tank with the one without a bag and they said no more G13 is sold because it was replaced with G12Evo due to the lag of silica bag in the new tanks.

I’m not sure where I read that the coolant has to be changed every 5 years. Or maybe that was just a recommendation? 

On 01/03/2021 at 17:42, fr1nklyn said:

I’m not sure where I read that the coolant has to be changed every 5 years. Or maybe that was just a recommendation? 

So - along the lines of the fact that the Silicia teabags have been removed, you need to renew the silica in the coolant for pump and engine coolant lubrication.  That's why the coolant needs to be changed every 5 years or 60,000 miles.  This is taken from an old spec pre 2012 when they started using G12.

Hi all, 

not sure about new tanks And silica bags however I’ve just fell foul to the silica bag issue. 
66 plate 1.6 tdi diesel with 43 k on the clock . 
my issue are the crazy prices to fix a technical design fault .  £650 to £850 I’ve been quoted for just have the system flushed! I’ve mentioned my cam belt and water are due soon so can I save any bringing in that forward . Nope, that’s another £600. 
now the egr valve might need changing . This is my first and at present last Skoda I’ll buy. 

 

Just went to have a look at the expansion tank in my 2016 VRS, and sure enough, the tea bag is present.

I've tried to fish it out, but had no joy; does anyone have any tips?

56 minutes ago, Noms said:

Just went to have a look at the expansion tank in my 2016 VRS, and sure enough, the tea bag is present.

I've tried to fish it out, but had no joy; does anyone have any tips?

Sorry I’m no help., I’ve noticed a few forums on this site talking about it. I didn’t know about the bag until the cost to flush was mentioned on my last service . I thought they had the decimal point in the wrong place .