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Thread: Does the 3116 have a CDR valve?

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    Colonel Reworked LMTV's Avatar
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    Default Does the 3116 have a CDR valve?

    Hi Guys, Does the 3116 have a CDR valve?
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    4 Star General coachgeo's Avatar
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    thanks for the push to learn something new today....
    Quote Originally Posted by What is a CDR

    Crankcase Depression Regulator Valve
    or CDR Valve / Diesels. This valve is similar in function to a PCV valve in a gas engine. On a diesel, the CDR valve regulates the amount of pressure or blowby from the crankcase back to the intake thru the turbo.
    Last edited by coachgeo; 06-13-2019 at 11:55.
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    And the answer would be no...

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    DSCN9274.jpg

    I believe that the crankcase fumes are handled by the thing on top of the secondary fuel filter housing. Not sure how though. I'd like to see how it functions.
    1998 M1078A0
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    1992 M101CDN(sold)
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    Not much to it. The filter base bolts to the side of the head over a port that connects in where the pushrods rise from lower block/camshaft. The filter base is hollow and the blowby gasses pass thru it up into the cap and hose and exit thru the hose. You can see these parts on pages 22-1 and 33-1 in the 24P manual...

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    Huh...looked them up.
    Odd combination of functions, but basically a rain hat for a hole in the block. For some reason it looks more involved than it is.
    1998 M1078A0
    1993 M998
    1986 M1009(sold)
    1992 M101CDN(sold)
    "Non Vi Sed, Arte"

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    So no valve or diaphragm?
    Before you pick up one more wrench to fix your military vehicle, pick up your pen or use your computer to FIGHT anti-military vehicle legislation like what just happened in Colorado. Monitor legislation in your state. Your Dream can be gone in a second of legislation. No drive rights = no military vehicle for politician's parade.

    Remember that tiny cut you forgot about? Brake cleaner remembers.....

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    Not according to the parts breakdown. Gasket where it connects to the head and o-ring where the top cap connects to the filter base...

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    Pg6 of PDF below appears to be the crank case vent style we have
    Attached Files Attached Files
    One does not get troubles in life... just character building opportunities. Build on with a smile

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    Daily driver- 99 VW TDI or 2002 KLR DIESEL w/cvt... weather permitting
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    Yep, non-ingestive...

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