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Exhaust Manifold Damper 304 V8

Discussion in 'Intermediate CJ-5/6/7/8' started by hepman, Oct 21, 2021.

  1. Oct 21, 2021
    hepman

    hepman New Member

    Germany
    Joined:
    Aug 10, 2016
    Messages:
    10
    Dear All, ist it worth to remove the Exhaust manifold damper on a 304 V8, is their an adapter for it. When I bought it it was fixed to the open possition. Does the always open position improve the V8 or is therer no change with or without?
     
  2. Oct 21, 2021
    sterlclan

    sterlclan Member 2021 Sponsor

    exploring the...
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    Feb 21, 2009
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    3,658
    it helps with warming in the winter.
     
  3. Oct 22, 2021
    hepman

    hepman New Member

    Germany
    Joined:
    Aug 10, 2016
    Messages:
    10
    but if it is almost summer, never below 50°F? But it does not hurt, am I right?
     
  4. Oct 22, 2021
    timgr

    timgr We stand on the shoulders of giants. 2021 Sponsor 2020 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    Yes, you are right.

    It's only important in very cold weather, and only for the first several minutes of driving.

    The closed klappe sends exhaust gas through a passage in the intake manifold, to the opposite side. This heats the intake manifold, which prevents fuel from condensing on the inside of the cold manifold. This improves fuel delivery to the cylinders ... but only when it's very cold, and for the first several minutes. Once the engine warms up, the flap opens and stays open.
     
    Last edited: Oct 22, 2021
    masscj2a and Ol Fogie like this.
  5. Oct 31, 2021
    jeepdaddy2000

    jeepdaddy2000 Member

    Eagle Point oregon
    Joined:
    Jun 24, 2004
    Messages:
    596
    The flap uses a bi metal strip, much like the one in your choke, to open and close. Over time, especially if the rig sits for long periods, they tend to rust and stick, usually in the closed position. If you are unwilling to check/lube it periodically, and don't live in super cold climates, then removing the strip (which should drop the weighted valve in the open position) or the entire unit would probably be a better long term answer.
     
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