[M1kk0]

Ademaxx:
In finnish Volkswagen forum, people have said that correct amount of viscous fluid in syncro T2/T3 is about 260-275 grams, and that viscous coupling is about 315-330 millilitres, which means that coupling is about 86% full of oil. If you put over 90% of oil, it jams, if you put less than 84% it doesn’t activate at all. I have also heard that reason why you need to leave about 10-16% of air in coupling, is that when it warms up, it can expand. Few people have topped up the whole coupling and when it has warmed up, it has cracked in pieces. Also they have said that every Syncro viscous should be samekind, but from that i am not sure.

[M1kk0]

I’m not sure is this right, but vagcat says it’s part number is: 02A301115A. Btw that plug is where you see when the crank is in TDC. There is mark on flywheel.

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