Question about Volkswagen Polo
A new "G12" coolant additive, recognized by its red color, has been introduced during m.y. 1997, replacing the "G11" used previously.
The "G11" and "G12" coolant additives are NOT interchangeable, and must NEVER be mixed. Use only water or "G12" coolant additive G 012 A8D A1 to top up cooling systems filled with "G12" = GLYSANTIN Alu Protect/G30 silikatfrei
Once coolants stabilize and provided the system remains sealed and airtight (has not overheated where it vented) then the system should not require any flushing or changing of the coolant (specific to HOAT/G12 type coolants).
G12 after about 5,000-10,000 miles reaches that point of stability where the coolant has neutralized any reactions that may occur. As long as that stability is not thrown off, leave it alone.
In the case of the TDI the water pump requires replacement, this should be the only time that the cooling system is drained and flushed and the system refilled. sticking with G12 insures that the original balance of chemicals are maintained as close as possible to the stabilization point to eliminate any risk of system contamination or corrosion.
It's really simple, G12 out, G12 in, to insure system protection and integrity.
Posted on May 21, 2011
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Posted on Jan 02, 2017
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