3046 Engine for Caterpillar Built Machines Valve Depth - Inspect Caterpillar

Introduction

This procedure is intended to give information on inspecting valve depth.

Required Tools

Check Procedure

Illustration 1	g00323908
8T-0455 Liner Projection Tool Group (1) Dial indicator (2) Gauge body (3) Gauge block

1. Use Tooling (A) in order to check the depths of the inlet valves and the exhaust valves below the face of the cylinder head. Use gauge block (3) to zero dial indicator (1).
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   Illustration 2	g00323909
   Measurement of the valve depth (1) Dial indicator (2) Gauge body

2. Position gauge body (2) and dial indicator (1) in order to measure the valve depth. Measure the depth of the inlet valve and the exhaust valve before the valve springs are removed.

   Refer to Specifications, "Cylinder Head Valves" for the minimum, the maximum, and the service wear limits for the valve depth below the cylinder head face.

   If the valve depth below the cylinder head face exceeds the service limit, use a new valve to check the valve depth. If the valve depth still exceeds the service limit, renew the cylinder head. If the valve depth is within the service limit, renew the valves.

3. Inspect the valves for cracks and other damage. Check that the valve stems for wear. Check that the valve springs are the correct length under the test force. Refer to Specifications, "Cylinder Head Valves" for the dimensions and tolerances of the valves and valve springs.