Gdetrailer wrote:Kpackpackkelley wrote:
Yes sir that’s a iron engine, the Onan microlite is aluminum and not made to last like that engine.
You DO realize that ALL "aluminum" engine cylinders ARE iron sleeved, right?
Onan is no exception to sleaving.
HERE is just one sample of an Onan gen engine which does state..
Engine
Engine Brand Cummins Onan
Starting System 12-Volt Button Start
HP 7 HP
Consumer Engine Warranty 2 Years
Engine RPM 3600 RPM
Cast Iron Sleeve Yes"
Basically in a nutshell, there IS a IRON cylinder sleeve that was either installed by pushing a sleeve in or using the iron sleeve as part of the aluminum molding process.
The outside of the cylinder is aluminum and finned for best heat dissipation for air cooling and less weight. Sleeved engines are used exclusively by even the automotive world in any aluminum or aluminum alloy block.
The sleeving is done so well that it is impossible to see any difference between the aluminum and the iron sleeve.
Some engines the sleeve is called a liner and is removable and replaceable, find that in big diesel engines.
The next air cooled engine you tear apart, take a magnet to the cylinder sleeve.. Bet the magnet will stick..
