Last oil I ran was Delo 15w-40 at the last oil change, but switched to the Liqui Moly. The valve stem seals were definitely put on correctly. I rechecked them recently and double checked them before I installed them since I had the entire engine out. I would like to do this compression test and see what it shows. Before that, I'd like to know about this "chemical soak" on the rings. I'm not really sure what that entails, but I'm guessing you mean to flood the cylinder the some sort of cleaning agent and then extract it out?? Maybe through the spark plug holes with vacuum and then change out the oil?

__________________

1990 190E 3.0L