The advantages of aluminum include the protection of its high stiffness, provided that the thickness of the aluminum crankcase protection for at least 5 mm. Due to the fact that aluminum is lighter than steel, such protection weighs as much as a steel, but it is very thick. Protection of housing Stainless steel is largely identical to the aluminum. At a cost may be higher, but due to their appearance, are a great decorative element, especially for an SUV. In order to make the best choice, you need to know what should be the right crankcase. The defense has its crankcase main purpose – to protect the engine blows.
Therefore, the most important quality reliable protection crankcase – rigidity. If the crankcase protection sufficient rigidity, it will bend on impact. And you know what can happen in this case? Protection will give a blow on crack! Therefore there is no sense to put the protection of the crankcase, if she is not tough. It's like that to go without it. Traveled from the parking lot METRO – all covered with snow.
Speed of 20 km / h, taxi, do not notice the snow dusted the curb and come on to him. Stopped – nothing everything is OK. I came home looking under car spot, rode – blah, oil! Outcome: cracked sump (defense bent and just hit the corner of the pan). Gave in Avignon (the others all were employed), arranged for welding base (crack brew argon) + something to do, since all the same Oil and filter change.