aaronj

I finished a head swap about two weeks ago on a 03 z06 ls6. When i did the swap i replaced the valve seals on the heads being that the heads were used and not new. When the cars starts up there is no smoke and the only time i see smoke is when i get on it or after it is warm and has been idling. Its really not much at idle just barely visible. I have done a compression test and all the cylinders check out. I also have capped off the pcv inlets on the intake to rule that out. Im not really getting a lot of blow by. All the plugs look the same they are not soaked in oil but more of a ashy light gray color. The car runs strong it put down 456 to the wheels with a ms3 cam and 200c terminator heads, ls6 intake and lg pros. I cant for the life of me figure what is causing it. To me it seems like valve seals and i am about ready to replace them all again. I haven't figured out how much it is using per mile but it is noticeable probably a quart every 500-1000 miles. I guess my main question is what else should i check and if there is any other ways to tell what might be causing this.

1lejohn

iTrader: (9)

Did you put the correct seals on the correct valves. There are two different type of seals. One for the ex, and another for the intake. Do you have a catch can on the PCV system?

aaronj

I thought the two different seals (brown&black) were for the stock springs i am using seals that i got from afr they are AFR-6612 designed for dual springs.

allbaugh_04

iTrader: (6)

My new seals were all the same. Perhaps that's an option, replace the seals again? making sure they are secure. Just a thought.

aaronj

Is there anyway to tell if its the seals besides seeing smoke at high rpm?

allbaugh_04

iTrader: (6)

Not to my knowledge, but i'm not very knowledgeable on the subject to be honest.

Here's another thread that could help https://ls1tech.com/forums/generatio...king-blow.html

aaronj

I also thought it was the rocker bolts being that they go into the intake port, so i used thread sealant on them but no such luck.

aaronj

UPDATE!!! well i pulled the passenger side valve cover and after closer inspection i notice a valve seal spring next to the back head bolt in the oil so now i will see which one it came off. This makes me wonder what would cause that to happen? Guess i will have to start pulling springs to find out, anyone had or heard of this happening before?

allbaugh_04

iTrader: (6)

Good job, just make sure they are on there tight.