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Home›Repair guides›Valve Guide Replacement

John Deere — Valve Guide Replacement

A John Deere service procedure — check it applies to your exact model before use.

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Before you start

  • Do not touch the cooled valve guide with bare hands to avoid skin damage.

Procedure

  1. Use a valve guide extraction tool and extract the valve guide from the cylinder head.
  2. Put liquid nitrogen or ether (or alcohol) with dry ice added in a container and put the valve guide for replacement in it for cooling. Then insert it with a valve guide inserting tool.
  3. Check the inside diameter and finish to the standard inside diameter as required with a reamer.
  4. Check the projection from the cylinder head.

Tools required

  • Valve guide extraction tool (12.1-1)
  • Valve guide inserting tool (No.2 of 4.1.2)
  • Reamer

Specs & torque values

  • Valve guide projection above cylinder head (by model): 3TNV82A 11.7-12.0mm
  • 3TNV84(T)/4TNV84/88 14.7-15.0mm
  • 4TNV84T 8.2-8.5mm
  • 4TNV94L/98(T) 9.7-10.mm
  • 4TNE106(T) 13.4-13.6mm

Source: manual:W484_Tier2+_Yanmar_3TNV_4TNV_series.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.