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Home >> Geo >> 1994 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.6L 4-CYL - VIN [6] & 1.8L 4-CYL - VIN [8] >> Overhaul >> Seat Correction Angles

Seat Correction Angles

To lower valve seat surface on valve, cut seat at 30 degrees and 45 degrees. To raise valve seat surface on valve, cut seat at 60 degrees and 45 degrees.