A friend of mine owns a 4x4 cosworth, the engine has been built by a reputable tuner and has covered approx 10k miles also his T34 turbo has covered approx 4k miles.

Now hes noticed that when he backs off throttle and then accelerates there is quite a large amount of blue smoke. this is worse some days more than others and sometimes doesnt happen at all.

His engine spec is greys etc and has a breather system.


Anyone have an idea what the problem couldbe?



john