1985 Subaru XT GL-10, AutomaticFACTORY OEM SERVICE PROCEDURE

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. Install unit using a new gasket.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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