I have a b17 i recently built that starts up with a cloud of blue smoke. The smoke only happens during inital acceleration at a stop light and start up. I came to the conclusion of it being valve stem seals but those and the guides were changed with supertech parts. Btw the head is a 99 si head and the motor has about 1200 miles on it. Here is the build below with compression and leakdown numbers. All thought and opinons will be appreciated.

Compression 220 230 230 230

Leakdown 20% 15% 15% 15% and can be heard through the intake manifold when t/b is opened

-B17a with pr3 pistons .50 over
-Skunk2 manifold (old style) ported runners. Still runing pcv
-itr cams with dual inner springs on exhaust side
-stock valves and retainers with supertech valve seals and guides
-comptech header
-2 1/4 piping with hollowed cat with magnaflow muffler

 

Sound like the seals, interesting

 

First thing Id do is run some sort of crankcase ventilation system. Let the crankcase breathe so your not forcing oil into your intake via the factory pvc system...

Have you inspected your valveguide seals yet? Just a visual?
Oil pooling inside your intake manifold?
Your leakdown numbers are a little higher than desired too..

 

I was thinking the guides were'nt intalled right and are causing the seals to mess up also causing higher leakdown numbers. I will take a look into the manifold to see if i am getting oil in it. Thanks for your imput

 

Any others? I was hoping cc or master would be able to chime in.

 

take your header out and look at your exhaust porting.Look where the oil come from....

 

Update : took off the head and checked the valvestem seals and looked like they didn't install them all the way down on the exhaust side changed them out with oems and no more smoke.

 

id be pissed if they messed up what they tried to install but ohwell go figure, atleast you got in narrowed down and fixed man. Have you done a leakdown since?