Posted by Janicholson on October 13, 2007 at 07:17:36 from (66.173.50.71):
In Reply to: Piston Sleeves posted by slowfolk on October 13, 2007 at 06:25:00:
The choice is often made as to which to use by the designer. There are reasons to choose. Dry sleeves are less bulky and take up less of the length of an engine. This allows a designer to shorten the block (maybe 1n inch or more on a 4 cyl). This shortens the crank making it stiffer and stronger while reducing weight. The engine is still rebuildable with little cost compared to machining a bore and fitting new pistons. Sleeve pullers are used on dry sleeves. A hockey puck shaped disk with a step in the outer diameter is placed in the bottom and a threaded rod (or hydraulic drawbar) is used to pull the sleeve into daylight. Wet sleeves are used when the easier replacement and little concern for compactness are the case. Many manufacturers have used both (and neither, putting pistons in the block casting), for the various models and uses. JimN
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