Hi.
I rebuilt the thermostat housing and removed the bypass valve and replaced it with a freez plug. I then let the engine warm up in the stand until it was up to temperature. There is coolant in the cylinder head. But when I open or even remove the petcock on the side of the block, no coolant comes out. I have tried to clean and scrape out the hole mechanically but without success. Perhaps someone has an idea what I can do. I have discovered the product evaporust thermocure, but unfortunately it is not available in Luxembourg. Here is a video of the running engine. engine run