Here is a pic
of the inside of the top timing chain cover off of a 104 engine that was getting oil droplets into the coolant and was not leaking internally. Notice the amount of sealant that was used - wow. Thank goodness it was Loctite 5900 or it could have broken off and done all kinds of damage in the oil passages. I mean this stuff is on there hard. Also, to the techs that have sealed one of these back up - is that some type of adhesive I see in the "o-ring". I figured something was used there to hold the o-ring into place. Actually looks like 3M weatherstrip adhesive. In addition, there is another colored sealant, same color as Ultra Copper, at the very back edge corners of the top front cover to the head/block interface.