These bronze liners from Goodson retains lubrication while reducing wear.
Dry sleeves and wet liners have long been used to repair and restore cracked or worn engine cylinders, but they are also used to reinforce aluminum blocks that are being built for serious performance applications.
Manufacturers who produce “linerless” hypereutectic aluminum blocks today include Audi, BMW, Honda, Mercedes, Porsche, Volkswagen, Volvo, and Yamaha. Most late-model engines have aluminum blocks to save weight, including most of the familiar domestic V8s such as Chevy LS, Ford 4.6L modular and 5.0L Coyote, and Chrysler 5.7L and 6.1L Hemi. Yet these have iron sleeves.
Sleeves are certainly not new technology and experts say that, for the most part, engine builders and machine shops understand the use and functionality well. But is a liner and a sleeve the same thing? Is a hole just a hole? Publisher/Editor Doug Kaufman takes a deeper dive.
Whether their purpose is going to be repairing an OE application or to go all out in the restructuring of the engine block, liners and sleeves have to be able to perform a number of tasks. Here are some tips to help you with their installation: