Cylinder Liners
Hartech Replacement Porsche 911 Cylinders / Hartech Replacement Porsche Cayman S Liners
To maximise the durability of all our customers engines we replace all 6 cylinders with a full set of our closed deck Nikasil plated aerospace alloy liners with matched forged CNC machined pistons. The cylinders convert the blocks from open to closed deck to increase the strength of the blocks.
We machine out the original Porsche Lokasil cast in liner preform and replace it with an aluminum alloy cylinder plated with Nikasil as used in the hugely successful 911 3.2 Carrera, 964, 993, 996 Turbo, 996 GT3, 997 Turbo cylinders. 
Like most leading engine designers/producers we discounted cast iron/steel liners many years ago which, whilst cheaper, don’t have the same expansion rates (leading to potential head gasket sealing issues & slipping/spinning), inferior heat transfer properties & poor long term wear rates, (and have replaced many previously repaired this way after further failures).
