Kohler — Cylinder Head Deposit Cleaning

Maintenance

From a Kohler service manual covering: 4CFKM, 4CKM, 5CKM, 5CKM/SCKMR, ACKM/4CKMR. Check it applies to your exact model before use.

Applies to: Kohler 4CFKM, Kohler 4CKM, Kohler 5CKM, Kohler M18 / M20 engine, Kohler M18 engine

Procedure

1. Remove carbon deposits from combustion chamber in head.
2. Scrape carbon with sharp piece of wood or plastic to avoid scratching aluminum.
3. Always replace cylinder head gaskets.
4. Tighten head bolts in sequence to 15-20 ft. lbs. (20-27 Nm).

Full service-parts list: Kohler 4CFKM →, Kohler 4CKM →, Kohler 5CKM →

Source: Kohler 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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