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471 smoke

  1. C

    471 Detroit Diesel

    I have a 1968 471 and it was rebuilt around 4000 hrs ago. The machine ran great until today. I wanted to install a inline heater core in the bottom of the rad hose. That went fine. I refilled the rad with coolant and let it idle for 30 mins with the cap off to get out any air... I thought I was...
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