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Home >> Geo >> 1990 >> Metro Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (1.0L 3-CYL - VIN [5] & 1.0L 3-CYL Turbo - VIN [2]) >> Removal & Installation >> Valve Seats Service

Valve Seats Service

WARNING: This page is about a different car, the 1988 Chevrolet Sprint. However, it is still accessible from the selected car via links, so may be relevant.
  1. Exhaust valve seats require the use of 3 cutters. To prepare the valve seat for final machining, 15 degree and 75 degree cutters are used. The third cutter or grinding wheel is used to produce the desired seat width at a 45 degree angle.
  2. Intake valve seats use the same sequence as exhaust valve seats, except the second cut is at a 60 degree angle. Lap valves on seats in 2 steps.
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