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      01-08-2013, 03:14 PM   #29
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Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Wichita, KS

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Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
Originally Posted by VCMpower
LOL, and I do not speak Latin! Alusil blocks contain about 20% silicon particles. When you bore and then hone Alusil(a very unique procedure) you expose tiny silicon beads that create the surface that the rings ride on(they do not touch Aluminum). The valleys between the beads get filled in with oil and ring material(during break in) creating a near perfect, frictionless seal. This is why the break in procedure is important as to how it is carried out. Hope this helps

Originally Posted by bigjae1976 View Post
Not questioning you're knowledge but Alusil sounds Latin. What's the difference?
Awesome! So how does overheating affect Alusil vs an aluminum block like the M54?
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red