Replacing valve stem seals in 305 H.O. small block chevy from 1986 Monte Carlo SS
I'm putting the original 305HO back in the Monte after taking the ZZ3 out for my Iroc project. This is mainly to make the car mobile but it may end up tagged with this engine for a while. Previous owner reported that this 305 has over 100k miles on it and has been out of the car since 1997. He said it smoked during startup and sure enough the valve stem seals were worn out. Hopefully this will fix the issue.
Chevy 305 burning oil? [solved]
[[UPDATE: It was a $0 problem. I assumed it was bad valve stem seals, but i had never taken off the right side valve cover to fully investigate and bought the seals anyway. I took off the valve cover to find the rear oil drain hole (theres one in the front and back of the head) was clogged with what i think it fiber from a 10 year old air filter i had been using..Basically the valve cover would fill with oil forcing oil to find its way down into the cylindars. So after i unplugged it, no more smoke! Easy as that! ]] I knew it couldn't possibly be something as serious as piston rings..it only had 53,000 miles on it at the time.
Knew I was 100% right,bad valve seals..
Been doing this long enough and knew I 100% was right about everything..
Valve seal Replacement
Leaking valve seals cause your engine to smoke when you first start it up, and then it usually runs the rest of the day with no smoke. Usually replacing the valve seals will fix the problem. Here's how to do it. Of course other engines may vary to some degree but the basics are the same.