Slant 6- Idle and Running

50/50 of old ATF and kerosene is a really good penetrant for frozen parts, thin enough to really get in there.I found if you spray it daily and tap the valve shaft lightly in either direction a few times and force rotate it a little more each day, it will eventually free right up. I freed a frozen block like that over the course of about a month. Even saved the bores from an overbore.