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Thread: Sinister delete leaking coolant

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    Basic Member dhernb's Avatar

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    Sinister delete leaking coolant

    My first Cummins sprung a little leak! I chased it around a bit but ended up narrowing it down to the coolant bypass hose connection. The o-ring was shot! NAPA had a #210 o-ring for .63 cents and 30 minutes later, it was all sealed up. I used chapstick to make the connector go together easier.


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    InlineSix.7's Avatar

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    Re: Sinister delete leaking coolant

    Yup this is very common. Good problem solving and glad you’re back in action. Happened to me on a camping trip last year. Gotta love it when your buddy (of course with a powerstroke) notices your truck is taking a leak.


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    2012 Ram 2500 Laramie 4x4 Crew Cab 6.7 Cummins. RevMax built 68RFE "550" transmission w/ billet flexplate/low stall triple disc TC/direct oiling billet input shaft. 35"x12.50" Toyo Open Country AT2 tires on OEM 20" wheels, Thuren soft ride front springs, Thuren track bar, Thuren upper and lower control arms, Hellbent steering box brace, King 2.0 steering damper, Redhead steering box, Fox 2.0 shocks, Carli ball joints, Caterpillar fuel filter/Donaldson water separator, ARP 425 head studs, Viair onboard air compressor, airlift 5k# rear airbags, V4 LED headlights, Kenwood head unit

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