Four stroke cylinder heads are small and commonly manufactured from cast iron. DMI Dubai’s reconditioning process involves detailed inspection to address all critical areas of the cylinder head. Before any repair is carried out, we conduct a pressure test to identify any leakages. Typical engines that we recondition are Sulzer, Wartsila, Daihatsu, MAK, MAN B&W, Yanmar and SEMT Pielstick.
Common failure characteristics observed in four stroke cylinder heads include:
The reconditioning process for cylinder heads includes:
Due to extensive corrosion on exhaust side pockets, they may have to be machined out to the next available oversize. Additionally, ovality of exhaust valve pocket must be identified and removed. Since cylinder heads are made of cast iron, any welding, should it be required, will be done by fusion welding. Over the years we have observed that the use of fusion welding for crack repair on cylinder heads has achieved better metallurgical and machining properties than those of parent materials.