[Zeke]

I read all the results on a search under "coolant," where I found this thread. The consensus is to not use anything but Porsche coolant at 50-60% with DISTILLED water.

I put about a half pint of Shellzone antifreeze with another half pint of tap water in my system to top it off 2 weeks ago. Now I have the dreaded tank and/or cap problem. Probably not related, but I guess I need to replace some items.

My question is should I completely drain all the coolant and start over? It's 32,000 old. Which VW/Audi formulation is OK and is it significantly cheaper, or should I just bite it and buy the P-car stuff? How many qts?


BTW, shell says it's low silicate-ethylene glycol. I assume that this is relatively safe as silicates must be the compound that gels. Will a flush rid any gelling?

TIA, AF and TP. We appreciate your help. Others too, of course.