ryan_89_mustang

When I rev the engine by hand from the TB I can see blue smoke pouring out on revs only I cannot see any at idle. This looks to be from the very back of the head. looks like its comming from the header but not sure what else it could be.

Tony71502

Exhaust leaking from exhaust manifold to header flange. Nothing else it really could be. If you have aftermarket headers chances are you didnt tighten the back bolt down all the way, its a pain in the ***. Hopefully your manifolds allow the use of a socket on that back bolt, I had to use an open end tiny *** wrench.

ryan_89_mustang

There is alot of oil around the back of the head like it is soaked on both sides and the top of the header flanges are stained with oil is is possible my valve covers are leaking enough to cause smoke. The manafolds are stock aswell and I haven't had them off, I can also hear a ticking from the opposite side aswell.

stang8689

Sounds like the oil is burning on the header, most likely valve cover like you said

ryan_89_mustang

Theres a hard tube coming from the back of the head that is soaked in oil as well does that contain any kind of exhaust fumes?or oil?

Tony71502

If oil was burning on the header it would smoke at idle as well as higher rpms, which is not the case. But yea I would say replace that valve cover gasket regardless if its the problem or not, which it probably is, and then go from there.

camaroeater

Have you deleted the steel line that connects both heads? If so, did you plug it with something other than a bolt and it came unplugged?

ryan_89_mustang

my emissions are not deleted the only part that is not there is the tube does not connect to the h pipe but I don't think that matters.