A c190? isuzu diesel engine installed on a tamaraw i just bought..the problem is when i started the engine and popped up the hood black smoke coming out of the uncapped radiator (cap is missing, typical here in the far east lol) is this a sign of a blow by? or something with the head gasket?..it doesnt emit white smoke just the normal belching lol...please help, thanks.

George, September 2009