At Fiennes Engineering our team has several decades of experience in the precision machining and repair of cylinder heads with expertise in all aspects of the process including welding and aqua-sealing, skimming, valve guide replacement, valve and valve seat re-facing, thread repair, re-shimming and unleaded conversions. We also offer a cylinder head skimming service – a process we highly recommend when the head gasket is replaced. This ensures a perfect surface for the head gasket to seal.