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Home›Repair guides›Doosan›Tightening cylinder head bolts

Doosan GE12TIC — Tightening cylinder head bolts

Maintenance

For the Doosan GE12TIC, from the Doosan service manual.

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Before you start

  • Excessive torque may damage cylinder head gaskets, liner flanges, and bolts

Procedure

  1. Coat head bolts with engine oil.
  2. Tighten bolts in proper sequence to 6 kg.m.
  3. Tighten additional 90°.
  4. Tighten additional 90°.
  5. Tighten additional 45°.
  6. Tighten additional 45°.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • Head bolt M14×1.5×150
  • Torque: 1st 6 kg.m; 2nd 90°; 3rd 90°; 4th 45°; 5th 45° (angle torque)

Source: Doosan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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