How long should I wait to refill with coolant and run after putting sealant on the outlet covrr for the upper rad hose? Going to take the timing cover off the 3vze for visual inspection...
Ultra grey is just one of many types of silicon RTV that permatec makes. They make some designed to be in contact with oil, some that are designed to be in contact with coolant. All are similar and good quality. Never had a RTV gasket I made go bad. On the back it will clearly tell you the cure time. While you probably don't need to wait that long, why not?
I had to take that piece off this weekend. I waited a whole 5 min before putting coolant in it (thats how long it took me to hook up the rest of the hoses)
And since you posted this yesterday... You should deff be good by now. haha.