N14 Cummins blowby
 

hi there. I am willing to by KW T2000 year 2003 with N14 celect plus. km..cant veryfaid previous owner chenge the ECM I guess because it's showing 657000 km . overall quality is good new rubber ec...But when u open the oil filling cap it blows lots of smoke. nothing from top cam breather . please help me I won't to know what's wrong with it. he asking 15000 Canadian dollars. as he going back to his country. thanks in advance.

You may be getting water in the oil. If that is the case the head gasket could be blown or head cracked.