I have a case 1175 that has me frustrated. I paid 800 for it and it had a busted sleve and piston (from sitting 1I years) after a new turbo and a Piston and sleve put her together and she ran great except for smoke coming from intake vent what Gets me is it hasent used oil or water and doesn't appear to skip sometimes it's hard to crank poors black smoke from exhaust pipe but won't crank other times u touch the key it fires right up I wonder f valves can cause this thanks ben