I have used Hylomar on the paper gaskets that fit on the ends of some of the coolant flanges on the heads. In my case it failed after only a year. I use the orange phosphate free coolant in my vans and perhaps this is the reason it failed. I now use the silicone head gasket sealant on these paper ones and so far no leaks. My 2 cents. Rick Koller '90 syncro '91' autos |
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