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Exhaust break

Discussion in '1982-Present GM Diesel' started by schlechto, Jul 2, 2002.

  1. schlechto

    schlechto Registered Member

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    I am in process of replacing the head gaskets on my 1987 GNC Jimmy and I noticed some kind of exhaust brake on the driver's side exhaust manifold. Is this a stock item? Is it neccessary, or can I remove it without getting into trouble?
     
  2. Tybee

    Tybee 1/2 ton status

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    I believe what your refering to has something to do with the emissions.
     
  3. René

    René 1/2 ton status

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    That is a back pressure flap, with is closed at an cold engine. Thus it warms up faster. If this flap wedges, you have a massive power loss.
     
  4. josephn

    josephn 1/2 ton status

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    It is called an epr (exhaust pressure regulator).
    At idle your egr valve is open and your epr is partially closed to increase back-pressure for the egr.
    I have removed mine as well as capping my egr port seems to run alot better. The j code engines run with neither.
     
  5. schlechto

    schlechto Registered Member

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    Thanks for the info guys /forums/images/icons/grin.gif I have decided to do away with all of the EGR crap so I guess that it will go into the trash bin as well.
     

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