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350 Cummins small cam excessive whit smoke and running rough
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NTM Farms
Posted 2/11/2024 18:06 (#10619149)
Subject: 350 Cummins small cam excessive whit smoke and running rough


Bloomfield MO
Freshly overhauled 290 small cam built to 350 specs. Timing was changed at the cam and cam followers. Rebuilt injectors, injection pump, in frame kit, pulse manifold from a big cam 2 and new N14 turbo. Heads were also reconditioned, small Jakes added with big cam 1 rocker boxes and water to air cooler added. Started truck and noticed a lot of white smoke, ran it down the road and it’s making a popping sound between 1600 and 1800 rpm. Brought it back to the shop and noticed fuel or oil coming from the front of the 3 piece exhaust manifold. New it was coming from either 1 or 2 cylinder. Removed the Jakes rocker box and everything looked good. Removed the manifold and turbo and noticed number 2 exhaust port was extremely wet. Popped number 2 injector and o rings were good and injector tip looked good. Pulled head and head gasket looked good. Could there be something wrong with the head? I took it back to the machine shop to have it checked again but haven’t heard anything yet.



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