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Old 27-07-17, 02:21 PM   #1
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Default Header Tank \ Overflow tank - K Seal


I need to pour k-Seal into the Radiator or Overflow tank in my 307

Can somebody confirm ifthe Overflow tank is same as where you pour the coolant, sorry im useless with cars

ie the tank with this symbol on it.


.see attachment
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Old 27-07-17, 07:41 PM   #2
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Why are you trying to put that rubbish into your cooling system? All it will do is block everything up and cause more issues than it is worth...
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Old 27-07-17, 10:48 PM   #3
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Pros and Cons. Read the "Automotive Repair" paragraph here.

Yes, it is the correct place, if your care to risk it. I suggest you drain the system (at least partially), then add the leak stopper, then top up with coolant, to get the stuff to the heat as quickly as possible - it only works when it gets to the hot metal, so just pouring it into the reservoir isn't going to do much.
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Old 07-08-17, 07:28 PM   #4
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K-seal doesn't block things up - I've used it successfully before - the older radiator sealants used to contain large particles that would sometimes lodge where they shouldn't - it's definitely not the case now.

I'd also recommend Holts Radweld - I've used this to seal up some fairly large holes in a radiator.

I believe that VW recommend adding in a radiator sealant as part of their servicing regime.
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