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  1. #1
    Rolling Along TNFSolitude's Avatar
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    Diesel engine oil filler cap

    I need an opinion on driving without the cap on the oil fill neck of my F250 diesel. My last oil change was mid-December. Since then I've driven approx 2200 miles, of which was 1200 miles pulling our Solitude to Florida. Lately I've been smelling exhaust or oil while idling at a light. I popped the hood and find my oil fill cap missing and much oil splattered on the various components under the hood. Fortunately I find the cap resting in a nook by one of the resovoirs. My question is; what harm if any has happened to my engine while driving and towing? Thanks for any of the mechanics and learned friends out there that know something here.
    Tom & Nancy
    Newport, MI
    369RL, #302

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  2. #2
    Long Hauler LCBoyer's Avatar
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    Unless some bugs crawled in the only real damage is the mess. You didn't say what year your 250 is, but it probably has positive crankcase ventilation
    2018 Freedom Elite 24FE, 2 Yorkies, and my wife MARILYN, HAM call K0LCB. Traveling around this great country, making friends and seeing lot of beautiful and interesting places

  3. #3
    Seasoned Camper Likes to tow's Avatar
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    I did this once on my F250 (460 gas) and no harm came to the engine. This truck was not a daily driver though and only used for a few short RV and boating trips. I changed the oil again and kept this truck for another 5 years. Was your oil level down on the dipstick?????

  4. #4
    Rolling Along TNFSolitude's Avatar
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    the truck's a 2013 and no the oil level wasn't low on the dipstick. Thanks for your responses.
    Tom & Nancy
    Newport, MI
    369RL, #302

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  5. #5
    Site Sponsor
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    Kerrville, TX RV parks through April 2020
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    One saving grace on Ford diesels is that the injectors need oil pressure to send fuel into the engine, (not sure on the 6.7). If oil pressure is not there, the engine will not run!
    AKA Steve and Lynne
    Storm the Black Lab
    Reflection 337 RLS vin 573FR3628E3300393
    2008 Dodge Ram 2500 Quad Cab Longbox
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  6. #6
    Big Traveler
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    I think that was the 6.0 engine that uses oil pressure to fire the injectors.
    Jim & Georgianne
    N. California
    2016 Reflection 29RS
    2008 Ford F-250 Super Duty PSD
    B&W Companion hitch
    Rubber turtle with no name

  7. #7
    Long Hauler
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    7.3's used oil pressure. You'll probably be okay if your oil level's fine.

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