someone911

i have a lt1 with a valve cover breather. is it normal to have blue smoke come out of it when you take it off.

NataSS Inc

iTrader: (9)

It is just oil that is getting hot going over the valve springs etc. The breather is just allowing it to vent into the atmosphere. Unless it is ALOT of smoke I wouldnt worry about it.

2xLS1

iTrader: (25)

Does the car still have the PCV system installed? Is it does, then there is more blow-by getting past the rings than it can evacuate. If the PCV system was removed when you installed the breather, then that blow-by will just vent through any opening it can find. It is also doing a good job contaminating the oil.