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WALKER® EXHAUST SYSTEMS: Mechanical Condition
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WALKER® EXHAUST SYSTEMS: Mechanical Condition
High-mileage engines can have many mechanical problems that contribute to high emissions.
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  • If the vehicle is so equipped, the EGR valve and passages should be inspected for proper operation, and cleaned, if necessary.
  • Perform a compression check to identify the condition of the piston rings, valve train and combustion chambers.
  • Check the camshaft lobes and the timing belt or chain for wear. Verify cam and ignition timing.
WALKER® EXHAUST SYSTEMS: Mechanical Condition