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Isuzu — Also, you should always re-apply the liquid gasket

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

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Procedure

  1. 4. Make sure that there are no gaps when reinstalling
  2. the liquid gasket parts to each other. If there are
  3. gaps between the two parts, re-apply the liquid
  4. gasket. Some parts, especially the oil pan, use the
  5. same size studs as a guide to eliminate the need
  6. for knock pin positioning etc.

Source: manual:SM-JCB-Isuzu-Engine-AU-4LE2-BV-4LE2-2.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.