4MG 3406B PCV valve

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mile marker 27, Feb 11, 2022.

  1. mile marker 27

    mile marker 27 Medium Load Member

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    Looking for a part number for a pcv valve, from peterbilt.
     
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  3. SmokinCAT

    SmokinCAT Road Train Member

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    Are you just needing the filtered breather attachment?

    PCV valves are for gas engines
     
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  4. mile marker 27

    mile marker 27 Medium Load Member

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    Yes sir.
     
    Oxbow Thanks this.
  5. SmokinCAT

    SmokinCAT Road Train Member

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    Hillsboro, OH./ Adrian, MI
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    upload_2022-2-11_10-29-57.png

    This what you are looking for?
     
    Oxbow, mile marker 27 and BoxCarKidd Thank this.
  6. BoxCarKidd

    BoxCarKidd Road Train Member

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    Once when I had that problem it happened again about two weeks later. Blowing the dipstick out, oil everywhere and such.
    Ended up it had an exhaust valve guide with excessive clearance. Maybe 3/16" with the spring still on it. Soot from the exhaust was passing into the crankcase. Reconditioned head had only been on about 6 weeks.
    Hope that is not your problem, just sharing.
     
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