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Home >> Subaru >> 1984 >> Brat Standard >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing >> Component Testing >> EGR Valve
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EGR Valve

  1. Look through opening in EGR valve body. With engine at normal operating temperature, check that valve shaft moves when engine reaches 3000-3500 RPM under no-load condition.
    NOTE: On 2WD Federal models, engine must have been running 8 minutes or more before performing this test.
  2. If shaft does not move as specified, remove valve and manually check valve movement. If valve appears okay, check vacuum lines for leaks. If valve does not operate, clean or replace.
    NOTE: When cleaning EGR valve, DO NOT wash in solvent or degreaser or permanent damage to the valve diaphragm will result.
  3. While holding valve assembly by hand, lightly tap on sides and end of valve with plastic hammer to remove exhaust deposits from the valve seat. DO NOT place unit in a vise.
  4. Using wire wheel, buff the exhaust deposits from around the mounting surface and valve. Depress the valve diaphragm, look through valve outlet and inspect valve seat area for cleanliness. Repeat cleaning operation if not completely clean.
  5. Inspect valve outlet for deposits and clean as necessary. Blow clean with compressed air. Recheck valve operation by applying 7.87 in. Hg vacuum with a hand pump. Reassemble unit using a new gasket.
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